Yes, ⁶³₂₉Cu are more atoms them⁶⁵₂₉Cu.
There are more atoms of ⁶³₂₉Cu in a sample of copper because the mass number of copper, which is 63.55 amu is closer to the mass number of an isotope present in the highest percentage.
Copper has two isotopes: Cu-63 = x% and Cu-65 = (100 – x)%
Average mass = (Atomic mass of Cu-63 x %Cu-63) + (Atomic mass of Cu-65 x %Cu-65)
63.55 = (63 x (x%)) + (65 x (100 – x)%
63.55 = 0.63x + 65 – 0.65x
0.02x = 65 – 63.55
0.02x = 1.45
x = 1.45/0.02
x = 72.5
Abundance of Cu-63 = 72.5%
Abundance of Cu-65 = (100 – 72.5)% = 27.5%
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The Stoneville Pedigree Seed Company is developing cotton seeds that produce toxins making the plants resistant to pests. How can the production of these new plant strains negatively impact the growth of cotton?
Ecological imbalance, Resistance development, Toxicity to non-target species, Market rejection and Regulatory issues are the factors that the production of new cotton plant strains with toxin-producing abilities could negatively impact the growth of cotton.
What are the effects of toxin production?
Toxin production in plants can have various effects on different species, including both beneficial and harmful impacts.
Non-target species: Toxins produced by plants can be harmful to non-target species, such as beneficial insects, birds, and mammals, that play important roles in maintaining a healthy ecosystem. For example, toxins produced by cotton plants could potentially harm beneficial insects that pollinate the cotton flowers, leading to reduced pollination and lower cotton yields.
Pest species: Toxins produced by plants can be effective in controlling pest populations, as they are designed to be toxic to specific pests. This can help to reduce damage to crops, increase yields, and reduce the need for chemical pesticides.
Humans and livestock: Toxins produced by plants can also have potential health risks to humans and livestock that come into contact with the plant or consume products made from the plant.
Therefore, it's important to carefully evaluate the safety of toxin-producing plants before they are introduced into the market.
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to prepare a nutrient solution, a nurse dilutes 1.0 l of 0.30 m by adding 4.0 l of water. the nurse then adds 100. ml of the diluted solution to an intravenous (iv) bag. how many moles of carbon atoms will the iv bag contain? solve this exercise without using a calculator.
The IV bag will contain 0.036 moles of carbon atoms. We can start by calculating the number of moles of C₆H₁₂O₆ in 100 ml of the diluted solution.
Calculate the moles of C₆H₁₂O₆ in 1 L of the original solution (0.30 M):
moles = concentration x volume = 0.30 M x 1.0 L = 0.30 moles
Calculate the volume of the diluted solution:
volume = original volume + added volume = 1.0 L + 4.0 L = 5.0 L
Calculate the concentration of C₆H₁₂O₆ in the diluted solution:
concentration = moles of solute / volume of solution = 0.30 moles / 5.0 L = 0.06 M
Calculate the moles of C₆H₁₂O₆ in 100 ml of the diluted solution:
moles = concentration x volume = 0.06 M x (100 ml / 1000 ml/L) = 0.006 moles
Calculate the number of moles of carbon atoms in 0.006 moles of C₆H₁₂O₆:
Each molecule of C₆H₁₂O₆ contains 6 carbon atoms, so the number of moles of carbon atoms in 0.006 moles of C₆H₁₂O₆ is:
moles of carbon atoms = 0.006 moles x 6 atoms of carbon / 1 molecule of C₆H₁₂O₆ = 0.036 moles of carbon atoms
Therefore, the IV bag will contain 0.036 moles of carbon atoms.
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Complete question:
To prepare a nutrient solution, a nurse dilutes 1.0L of 0.30 M C6H12O6(aq) by adding 4.0L of water. The nurse then adds 100. ml of the diluted solution to an intravenous bag. How many moles of carbon atoms will the IV bag contain?
elements with standard reduction potentials lower (more negative) than water are susceptible to corrosion in aqueous environments, even when not in contact with another metal. true / false: elements with standard reduction potentials lower (more negative) than water are susceptible to corrosion in aqueous environments, even when not in contact with another metal. true false
The statement is True, because, Elements with standard reduction potentials lower (more negative) than water are susceptible to corrosion in aqueous environments, even when not in contact with another metal.
This is because the oxide layers that form on the surface of the metal are more easily corroded in water than in air. Additionally, the corrosion rate is accelerated by the presence of other ions in the water, such as chloride ions, which can break down the oxide layers and lead to corrosion.
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molecules of a liquid can pass into the vapor phase only if the question 17 options: a) temperature of the liquid is near its boiling point. b) molecules have sufficient kinetic energy to overcome the intermolecular forces in the liquid. c) liquid has little surface tension. d) vapor pressure of the liquid is high.
Molecules have sufficient kinetic energy to overcome the intermolecular forces in the liquid. So option B is correct.
Molecules of a liquid can pass into the vapor phase provided that the molecules have adequate kinetic energy to beat the intermolecular powers in the fluid.
This happens when the temperature of the fluid is close to its edge of boiling point, and the vapor tension of the fluid is high. The surface pressure of the fluid affects the vaporization cycle.
So, the correct option is b) "molecules have sufficient kinetic energy to overcome the intermolecular forces in the liquid."
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If we reduce the volume in the vessel and the new pressure is measured to be 40 atm, what would the new volume be?
The new volume of the gas will be equal to 2.5 L at a pressure of 40 atm.
The final pressure of the gas = 40 atm
The initial volume of the gas = 10 L
According to Boyle's law, a gas's pressure is inversely proportional to its volume when the gas is a certain mass and is operating at a fixed temperature. So long as the temperature is constant, the relationship between the pressure and volume is inverse.
Calculating the pressure -
P ∝ 1/V or P₁V₁ = P₂V₂
Substituting the values of volume and pressure -
= 10 × 10 = 40 × V₂
V₂ = 100/4
V₂ = 2.5 L
Complete question:
We are studying the properties of a 10 L vessel of an ideal gas at 300 K and 10 atm of pressure inside. We can fix the volume or the pressure of the vessel as we like. If we reduce the volume in the vessel and the new pressure is measured to be 40 atm, what would the new volume be?
(A) 10 L
(B) 5 L
(C) 3.33 L
(D) 2.5 L
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how much energy is required to vaporize 500 grams of water? the molar mass of water is 18.02 g/mol. the heat of vaporization of water is 40.67 kj/mol. group of answer choices 1128 kj 1280 kj 156.7 kj none of them
The amount of energy required to vaporize 500 grams of water is 1128 KJ. when the heat of vaporization of water is 40.67 kj/mol.
The process of turning a liquid at its boiling point into a gas involves the absorption of energy. The temperature of a boiling liquid stays constant, just like with a solid's melting point, and energy must be added to cause the state to change. The heat that one mole of a substance absorbs during the transition from a liquid to a gas is known as the molar heat of vaporisation (Hvap).
The given data is
amount of water = 500 grams
molar mass of water = 18.02 g/mol
heat of vaporization of water [tex]H_{vap\\}[/tex] = 40.67 kj/mol
The vaporization's molar heat,[tex]H_{vap\\}[/tex]
The molar enthalpy of vaporisation, measures the amount of energy required to vaporise one mole of a given substance at its boiling point.
In the example of water, a molar heat of vaporisation of 40.67 kJ /mol 1 indicates that 40.67 kJ/mol of heat must be applied in order to bring 1 mole of water to a boil at its typical boiling point of 100 C.
So,
for calculating the mass of water to moles by using its molar mass:-
500*[tex]\frac{1}{18.02}[/tex] = 27.74
So, the energy requires is :
27.74*[tex]\frac{40.67}{1}[/tex] = 1128 KJ
Hence, the energy required to vaporize 500 grams of water is 1128 KJ.
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Two graduated cylinders, one filled with water to 17 milliliters and one with water and a key filled to 25 milliliters.
Calculate the volume of this irregular solid to the nearest cubic centimeter.
What is the volume of the key?
Here, assume that the two cylinders are initially filled with 17 ml of water. But the water level in the second beaker raised to 25 m/ Then the difference in water level is the volume of the substance that is, volume of the key is 8 ml or 8 cm³.
What is Archimedes principal ?Archimedes principal states that, when an object is submerged in a fluid, the volume of displaced from the fluid is equal to the volume of the submerged object.
Objects with a density less than water will float on it. Whereas, objects denser than water will sink on it. Certain volume of water will replace or rises above by equal volume of the object.
Here, initially the water level was up to 17 ml. The water level raise up to 25 ml. Thus 8 ml of water is replaced by the key. Therefore, the volume of the key is 8 ml.
1 ml = 1 cm³
then volume of the key is 8 cm³.
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The melting point of gold is 1947°F. Express this temperature in degrees Celsius
and in kelvins
The melting point of gold is 1947°F. This temperature in degrees Celsius 1063.889°C and in kelvin is 1337.039K.
What is temperature ?Temperature is a physical quantity that quantifies our feelings of hotness and coldness. A thermometer is used to measure temperature.
According to the International System of Units, the SI unit of temperature is Kelvin, which is represented by the symbol K. In the fields of science and engineering, the Kelvin scale is widely accepted or used. However, in most parts of the world, temperature is measured using the Celsius or Fahrenheit scale.
Thus, The melting point of gold is 1947°F. This temperature in degrees Celsius 1063.889°C and in kelvin is 1337.039K.
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determine the molality of a solution of water dissolved in methanol for which the mole fraction of water is 0.228.
The molality of a solution of water dissolved in methanol for which the mole fraction of water is 0.228 is 9.45*10-3 M.
Mole fraction = 0.228 = moles water/total moles
Let total moles = 1
0.228 = x/1
X =0.228
Molality = moles of solute/mass of solvent
M = 0.228/(1-0.228)*32= 9.45*10-3 M
Molality (m), or molal awareness, is the amount of a substance dissolved in a sure mass of solvent. it's far defined because of the moles of a solute in step with kilograms of a solvent. The molality of a solution is identical to the moles of solute divided via the mass of solvent in kilograms, at the same time as the molarity of an answer is equal to the moles of solute divided by way of the extent of solution in liters.
Molality is a measure of the range of moles of solute in an answer corresponding to 1 kg or a thousand g of solvent. This contrasts with the definition of molarity that's based totally on a precise quantity of solution. A normally used unit for molality in chemistry is mol/kg. The image for molarity is M or moles/liter. Chemists also use square brackets to signify a reference to the molarity of a substance.
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8.97 dm^3 of hydrogen gas is collected at 38.8 degrees celsius. Find the volume of the gas will occupy at -39.9 degrees celcius if the pressure remains constant
The final volume can be determined using Charles's law. The volume of gas at -39.9 degree Celsius will be 6.7 dm³.
What is Charles's law of gases ?
According to Charles's law, at constant pressure, the volume of a gas is directly proportional to the temperature.
Hence, V/T = constant.
Let, V1 and T1 be the initial volume and temperature and V2, T2 be the final quantities.
then, V1/T1 = V2/T2.
V2 = V1 T2/ T1
Given, V1 = 8.9 dm³
T1 = 38.8 °C = 311.8 K
T2 = -39.9 °C = 233.1 K
Then, V2 = 8.9 dm³ × 233.1 K /311.8 K = 6.7 dm³
Therefore, the volume of the gas reduces to 6.7 dm³
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the mass in grams of 7.5 moles of AI(OH)3
The mass (in grams) of 7.5 moles of aluminum hydroxide, Al(OH)₃ is 585 grams
How do I determine the mass of Al(OH)₃We'll begin by obtaining the molar mass of Al(OH)₃. Details below:
Molar mass of Al = 27 g/molMolar mass of O = 16 g/molMolar mass of H = 1 g/molMolar mass of Al(OH)₃ =?Molar mass of Al(OH)₃ = 27 + 3[16 + 1]
Molar mass of Al(OH)₃ = 27 + 3[17]
Molar mass of Al(OH)₃ = 27 + 51
Molar mass of Al(OH)₃ = 78 g/mol
Finally, we shall determine the mass of 7.5 moles of Al(OH)₃. Details below:
Mole of Al(OH)₃ = 7.5 moles Molar mass of Al(OH)₃ = 78 g/molMass of Al(OH)₃ =?Mole = mass / molar mass
Cross multiply
Mass = Mole × molar mass
Mass of Al(OH)₃ = 7.5 × 78
Mass of Al(OH)₃ = 585 g
Thus, we can conclude that the mass of Al(OH)₃ is 585 g
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compound a exhibits two singlets in its 1h nmr spectrum at 2.64 and 3.69 ppm and the ratio of the absorbing signals is 2:3. compound b exhibits two singlets in its 1h nmr spectrum at 2.09 and 4.27 ppm and the ratio of the absorbing signals is 3:2. which compound corresponds to dimethyl succinate and which compound corresponds to ethylene diacetate?
Compound A corresponds to dimethyl succinate, while compound B corresponds to ethylene diacetate.
To determine the assignment, we can use the chemical shift values and the signal intensity ratios.
For dimethyl succinate (compound A), the signals at 2.64 ppm and 3.69 ppm correspond to the methyl groups on the succinic acid moiety. The 2:3 ratio of these signals is consistent with the coupling between the two methyl groups (J = 6 Hz) and indicates that they are present in a trans configuration.
For ethylene diacetate (compound B), the signals at 2.09 ppm and 4.27 ppm correspond to the acetyl protons on the ethylene moiety. The 3:2 ratio of these signals is consistent with the coupling between the two acetyl groups (J = 9 Hz) and indicates that they are present in a trans configuration.
So, based on the above information, compound A corresponds to dimethyl succinate and compound B corresponds to ethylene diacetate.
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what are examples of solutions in your every day life? select one or more: pure water vinegar rubbing alcohol table salt mouthwash tea
The option (d) is correct i.e. All of the above, are the examples of solutions in our everyday life.
Examples of solutions in everyday life include:
1. Pure water - Water is considered a pure substance because it consists of only one type of molecule (H2O). However, it can also function as a solvent in solutions. For example, water can dissolve salts, sugars, and other dissolved solids, making it a common ingredient in many beverages, foods, and cleaning products.
2. Vinegar - Vinegar is an aqueous solution of acetic acid that is commonly used in cooking, cleaning, and as a condiment. It is a homogeneous mixture of acetic acid and water that is transparent and has a distinct sour taste.
3. Rubbing alcohol - Rubbing alcohol is a solution of isopropyl alcohol and water that is used as a topical antiseptic and for cleaning surfaces. It is a clear, colorless liquid with a distinct, somewhat medicinal odor.
4. Table salt - Table salt is a solution of sodium chloride in water that is used as a seasoning and food preservative. It is a homogeneous mixture of sodium and chloride ions in a crystalline form that dissolves readily in water.
5. Mouthwash - Mouthwash is a solution of various active ingredients in water that is used to freshen breath, kill germs, and clean the mouth. It is a homogeneous mixture of ingredients that is typically used after brushing and flossing.
6. Tea - Tea is a solution of various soluble compounds in water that is made by steeping tea leaves in boiling water. It is a homogeneous mixture of soluble compounds, including caffeine, tannins, and other flavonoids, that is widely consumed for its flavor and health benefits.
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Question - what are examples of solutions in your every day life? select one or more:
(a) pure water & vinegar
(b) rubbing alcohol
(c) table salt, mouthwash and tea
(d) All of the above
what mineral is the hardest known substance in nature? group of answer choices silicate diamond muscovite native gold
Diamond mineral is the hardest known substance in nature, its resistance to scratching and is measured using the Mohs scale
The hardness of a mineral is defined as its resistance to scratching and is measured using the Mohs scale, a relative scale that ranges from 1 (softest) to 10 (hardest). Diamond has a hardness of 10, the highest rating on the Mohs scale, making it the hardest substance known to exist in nature. This hardness gives diamond its exceptional durability, making it ideal for use in jewelry and other applications where scratch resistance is important. The hardness of diamond also makes it difficult to cut, shape, and polish, which has led to the development of specialized cutting and polishing techniques to work with this unique mineral.
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If you have 1.0 mol of each of the following compounds, which will have the greatest
mass?
H3PO4NI3
FeCl3
KCI
It implies that the massiest component is 1.0mole of NI3. The correct reaction is A.
How are samples and compounds?A substance comprised of two or so more elements is known as a compound. Table salt, water, and co2 are a few instances of compounds.
So because number of moles of a mixture is the mass from one gram of that compound, finding the molarity of each compound and contrasting them to determine which one is the highest would provide the answer to this problem.
NI3 seems to have a molar mass of 394.72g/mol.
H3PO4 does have a molar mass of 97.99 g/mol.
KCl seems to have a molar mass of 74.55g/mol.
FeCl3 seems to have a molar mass of 162.2 g/mol.
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which mass law(s) is/are demonstrated by the observation that a sample of potassium chloride from chile contains the same percent by mass of potassium as one from poland?
The observation that a sample of potassium chloride from Chile contains the same percent by mass of potassium as one from Poland demonstrates the Law of Definite Proportions, also known as Proust's Law.
Proust's Law, also known as the Law of Definite Proportions, states that a chemical compound always contains the same elements in the same proportions by mass, regardless of its source. This law was first stated by French chemist Joseph Louis Proust in 1799. The law is a fundamental principle of chemistry and provides the basis for the idea of atomic theory. It demonstrates that the elements in a chemical compound are combined in a fixed ratio and that this ratio is characteristic of the compound. The law applies to all chemical compounds, whether they are naturally occurring or synthesized in the laboratory. This observation is key to the understanding of the behavior of chemical substances and the development of the science of chemistry.
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the normal boiling point occurs when the question 8 options: a) intermolecular forces within the liquid phase are broken. b) vapor pressure of the liquid equals the external pressure. c) temperature of the pure liquid equals the external temperature. d) vapor pressure of a pure liquid equals an external pressure of one atmosphere.
The normal boiling point of a liquid occurs when the vapor pressure of the liquid equals the external pressure, which is typically one atmosphere (760 torr). Correct answer: letter C.
This means that the vapor pressure of the liquid must equal the atmospheric pressure in order for the liquid to boil. The temperature at which this occurs is known as the normal boiling point.
As the temperature continues to rise, the vapor pressure of the liquid continues to increase, and eventually surpasses the atmospheric pressure. At this point, the liquid will enter a state of rapid evaporation, usually referred to as boiling.
Boiling is a process where liquid molecules evaporate from the surface of the liquid, forming a gas. The temperature of the liquid at which this occurs is referred to as the boiling point. The boiling point of a liquid is determined by the vapor pressure of the liquid, which is affected by factors such as the intermolecular forces within the liquid, the temperature, and the external pressure.
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What is the wavelength of a light wave with a frequency of 2.5 x 10¹4 Hz?
Answer:
[tex]\huge\boxed{\sf \lambda = 1.2 \times 10^{-6} \ m}[/tex]
Explanation:
Given data:Frequency = f = 2.5 × 10¹⁴ Hz
Speed of light = c = 3 × 10⁸ m/s
Required:Wavelength = λ = ?
Formula:[tex]\displaystyle \lambda = \frac{c}{f}[/tex]
Solution:Put the given data in the above formula.
[tex]\displaystyle \lambda = \frac{3 \times 10^8}{2.5 \times 10^{14}} \\\\\lambda = 1.2 \times 10^{8-14}\\\\\lambda = 1.2 \times 10^{-6} \ m\\\\\rule[225]{225}{2}[/tex]
if the system has more than one solution, then so does the homogeneous system group of answer choices true false
The Trivial Solution is what we refer to as. A homogeneous system can never be inconsistent since it always has a solution (the simple solution). As a result, a homogeneous system of equations always has either a singular solution.
True or false: Is it possible for a system to have multiple solutions?A system of linear equations typically has a single solution, although it is occasionally possible for there to be no solution (parallel lines) or infinitely many solutions (same line).
What characteristics distinguish a homogeneous system?When all of the constant terms in a system of linear equations are equal to zero, the system is said to be homogeneous. A homogeneous system always has at least one solution, which is the zero vector. A homogeneous system that has undergone a row operation remains homogenous after the operation.
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what type of reaction combines a carbon-hydrogen compound with oxygen to form carbon dioxide and water?
A hydrocarbon (a substance containing carbon, hydrogen, and potentially oxygen) always combines with oxygen to generate both water and carbon dioxide in a combustion process.
What are the uses of oxygen?The energy-producing process that powers the metabolic functions of most living organisms, respiration, depends heavily on oxygen. All living creatures, including people, are reliant on air to survive.
What is the oxygen's source?According to scientists, the oceans produce almost percent of the oxygen that is used by humans. The primary source of this synthesis is oceanic plankton, which comprises floating flowers, algae, and some bacteria that may photosynthesize. It belongs to a particular species and is the smallest photosynthetic organism on Earth.
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aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . suppose 6.6 g of hydrochloric acid is mixed with 10.2 g of sodium hydroxide. calculate the maximum mass of sodium chloride that could be produced by the chemical reaction. round your answer to significant digits.
The balanced chemical equation for the reaction between hydrochloric acid and sodium hydroxide is: HCl(aq) + NaOH(s) → NaCl(aq) + H2O(l).
The maximum mass of sodium chloride that can be produced from the reaction depends on the limiting reagent, which is the reactant that runs out first and limits the amount of product that can be formed. To determine the limiting reagent, we need to calculate the number of moles of each reactant.
Given 6.6 g of hydrochloric acid, we can calculate its number of moles:
n = m / M
= 6.6 g / 36.5 g/mol
= 0.18 mol
Similarly, for 10.2 g of sodium hydroxide, we can calculate its number of moles:
n = m / M
= 10.2 g / 40 g/mol
= 0.255 mol
Since the number of moles of sodium hydroxide is greater than the number of moles of hydrochloric acid, hydrochloric acid is the limiting reagent. Hence, the maximum amount of sodium chloride that can be produced by the reaction is 0.18 mol, or:
m = n x M
= 0.18 mol x 58.5 g/mol
= 10.5 g
Therefore, the maximum mass of sodium chloride that could be produced by the reaction is 10.5 g.
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what is the molality of a solution containing 5.0 moles of kcl and 75.0 moles of h2o? your answer should have two significant figures.
The molality of a solution containing 5.0 moles of kcl and 75.0 moles of H₂O is 3.7mol/ kg
The number of moles of solute in a solution equal to 1 kg or 1000 g of solvent is referred to as its molality. The definition of molarity, on the other hand, is based on a certain volume of solution. Mol/kg is a standard measurement for molality in chemistry.
KCI has moles of nKCI=1.12mol.
H₂O hasmoles of nH2O = 16.0mol.
Let's determine the given solution's molality.
We must ascertain the solvent's mass.
Water's molar mass is
MH₂O=2⋅MH+1⋅MO
=2⋅1.008g/mol+1⋅16g/mol
=18.016g/mol
The solvent has a mass of
nH₂o=mass H₂0/MH₂O
mass H₂O=nH₂O⋅MH₂O
=75.0mol⋅18.016g/mol
=1,351.2g⋅ 1kg/1000g
=1.3512kg
We can now determine the molality of a certain solution.
Molality is moles devide by mass solvent
Molecularity = n KCl/mass H₂O
= 5mol/ 1.3512kg
= 3.7mol/ kg
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when phosphorus-30 loses a positron (undergoes positron emission) what is the product of this radioactive decay?
When phosphorus-30 loses a positron (undergoes positron emission) the result is sulphur-30.
Radioactive decay is also defined as the nuclear decay refers to the process where a new element, which is relatively more stable than its parent nucleus and is formed when an unstable atomic nucleus releases out energy in the form of radiation. Radioactive decay can be classified into various types, which are alpha decay, beta decay, gamma decay, positron emissions, and electron capture, these types can be distinguished from one another in terms of the particle they emit forming the type of product.
Sulphur-30 is made from sulphur springs that is suitable for skin ailments such as pain, redness, burning, and inflammation. It belongs to the mineral kingdom. Sulphur-30 is also beneficial in the treatment of stomach disorders like acidity and gastric issues.
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hing
Math
Assessment
m/science
Analytics
Language arts
m grade F.5 Compare physical and chemical changes PPU
Science
What do these two changes have in common?
photosynthesis
a penny tarnishing
Select all that apply.
Both are only physical changes.
Both are caused by heating.
Submit
Social studies
Both are chemical changes.
Both are caused by cooling.
Work it out
Re-
Photosynthesis and penny tarnishing is both are chemical changes.
Photosynthesis is a chemical change. The process of photosynthesis is the process of making energy in plants that utilize sunlight, air and carbon dioxide into energy.
Tarnishing is considered a chemical change. A change in color indicates that a new chemical has been created. The copper on the surface of the coin combines with oxygen in the air to form another substance, copper oxide.
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the liquid and __ states are called the __ states of matter because their particles are very close together.
The liquid and Solid states are called the Condensed states of matter because their particles are very close together.
In the bodily sciences, a particle (or corpuscle in older texts) is a small localized item that can be defined with the aid of numerous physical or chemical residences, consisting of extent, density, or mass. they range greatly in size or amount, from subatomic debris just like the electron, to microscopic debris like atoms and molecules, to macroscopic particles like powders and other granular materials. debris also can be used to create clinical fashions of even larger items depending on their density, which includes people shifting in a crowd or celestial bodies in motion.
The term particle is rather fashionable in meaning and is refined as needed with the aid of numerous clinical fields. whatever is composed of particles may be referred to as being particulate. but, the noun particulate is maximum frequently used to consult pollutants within the Earth's surroundings, which are a suspension of unconnected particles, as opposed to connected particle aggregation.
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what is the oxide thickness if dry oxidation is performed on bare silicon at 1000oc for 1 hour in dry oxygen?
The oxide thickness if dry oxidation is performed on bare silicon at 1000oc for 1 hour in dry oxygen is 0.069470392 [tex]\mu \mathrm {m}$[/tex]
Oxide thickness is determined by quantification of total amount of oxygen and assuming an oxygen atom density. It increases with increasing oxidation time and temperature.
Using the formula t(ox)^2+A(tOx)=b(t+ζ)
The oxide thickness after a dry thickness at 1000 degrees Celsius needs to be calculated.
A=0.165 [tex]\mu \mathrm{m}[/tex]
B=0.117 [tex]\mu \mathrm{m}^2 / hr[/tex]
ζ=0.37
Substituting the values, we get
t(ox)^2+0.165 t(ox)=0.117(1+0.37)
t(ox)^2+0.165 t(ox)-0.016029=0
t(ox)^2+0.165 t(ox)-0.016029=0
Now using the quadratic formula, it can be written as follows;
[tex]t_{o x}=\frac{-0.165 \pm \sqrt{(0.165)}-4 \times 1 \times(-0.01004)}{2}[/tex]
[tex]t_ox=\frac{-0.165 \pm \sqrt{0.027225+0.06516}}{2}[/tex]
[tex]t_ox=\frac{-0.165 \pm \sqrt{0.092385}}{2}[/tex]
[tex]t_ox=\frac{-0.165 \pm 0.303940784}{2}[/tex]
[tex]t_ox=0.069470392 \mu \mathrm{m}[/tex](ignoring the negative value as thickness can't be negative)
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which mineral reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas? which mineral reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas? calcite gypsum quartz plagioclase
Calcite reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of CO2 gas.
The reaction can be represented by the equation: CaCO3 + 2 HCl → CaCl2 + H2O + CO2. This reaction occurs because the hydrochloric acid reacts with the calcium carbonate in the calcite to form calcium chloride, water, and carbon dioxide gas. The gas bubbles are visible evidence of the reaction.
Calcite is a mineral that reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of carbon dioxide (CO2) gas. This reaction occurs because the hydrochloric acid reacts with the calcium carbonate in the calcite to form calcium chloride, water, and CO2 gas, which can be represented by the following chemical equation: CaCO3 + 2 HCl → CaCl2 + H2O + CO2. The release of CO2 gas in the form of bubbles is a visible indication that the reaction has taken place. The other minerals listed (gypsum, quartz, and plagioclase) do not react with dilute hydrochloric acid in this way.
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if a stock solution has a concentration of 1.58 m, how much volume in ml of the concentrated stock will you need to use to prepare a diluted 0.16 m solution with 474 ml total volume?
we require 50,9 ml of concentrated stock solution to prepare diluted 0.16 m solution with 474 ml total volume..
How is a 100 ml stock solution made?Pipetting 10 ml of stocks 10% sucrose into the a 100-milliliter volumetric flask and adding 100 ml of water would provide 100 ml diluted 1% sucrose.Simply said, diluting stock solutions is a more practical way to create different sampling method involves then weighing out chemical individually.
What is a 2.00 M stocks solution's volume?100 mL, or 0.1 L, of the standard solutions is all that is required.Use the dilution formula M1V1 = M2V2, where M is the solution's concentration in mol/L, V is the volume in litres, and 1 and 2 are the concentrated and diluted conditions, respectively.
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boiling point of a solution containing n5.35 g of a nonvolatile hydrocarbon in 102.2 g of aceotne is 56.6 what is the molecular weight of the hydrocarbon?
The molecular weight of the hydrocarbon is approximately 82 g/mol.. To determine the molecular weight of the hydrocarbon, we need to use the boiling point elevation formula.
The boiling point elevation, ΔTb, of a solution is given by ΔTb = Kb * molality, where Kb is the molal boiling point constant for the solvent (1.71 °C/m for acetone) and molality is the concentration of solute in the solution (moles of solute per kilogram of solvent).
The molality of the solution can be calculated as follows:
molality = (5.35 g of hydrocarbon) / (molecular weight of hydrocarbon)
The boiling point elevation can then be calculated as:
ΔTb = Kb * molality
Rearranging the equation and substituting the known values, we can solve for the molecular weight of the hydrocarbon:
molality = (56.60°C - 55.95°C) / Kb
molality = 0.065 mol/kg
molecular weight of hydrocarbon = (5.35 g) / (0.065 mol/kg)
The molecular weight of the hydrocarbon is approximately 82 g/mol.
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if the following elements were to form ions, they would attain the same number of electrons as which noble gas? drag the appropriate elements to their respective bins
The appropriate elements to their respective bins Li----------- He, O,Mg ----------- Ne, S, K ------------Ar,Rb, ------------- Kr
The Li+ ion has 2 electrons, just like He. The ions Mg2+ and O2− each have 10 electrons like Ne. The S2− and K+ each have 18 electrons like Ar. The ions As3− and Rb+ each have 36 electrons like Kr.
What other ions contain as many electrons as a noble gas?
As an illustration, oxygen in Group 16 forms O2 to have the same number of electrons as neon, barium in Group 2 forms Ba2+ to have the same number of electrons as its nearest noble gas, xenon, cesium in Group 1 forms Cs+ to have the same number of electrons as xenon.
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Complete question is here:
If the following elements were to form ions, they would attain the same number of electrons as which noble gas Whose the appropriate elements to their respective bins.
As,Li,O,S,k,Mg,Rb
a)He
B)Ne
C)Ar
D)Kr