The heat that is required to increase the temperature of 2.10 mol of an ideal gas by 60.0 k near room temperature if the gas is held at constant volume and is diatomic is 2618.91 J.
n = no. of mol= 2.10 mol
T = Temperature = 60.0 K
Q = nCv × ∆T .........eqn(1)
Where CV = molar heat capacity =5/2R for diatomic particle ,such as H₂
CV = molar heat capacity = 3/2R for diatomic, such as H
R = gas constant = 8.314 J/mol × K
Q = heat energy
For a diatomic molecules
Q = n Cv × T
But
Cv = molar heat capacity = 5/2R = 5/2(8.314) = 20.785
CV = 20.785
∆T= Temperature= 60.0 K
Then substitute the values into the eqn(1)
Q = 2.10 × 5/2(8.314) × 60
Q = 2.10 × 20.785 × 60
⇒ Q = 2618.91 J
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which of the following in each pair is likely to be more soluble in carbon tetrachloride, ccl4? benzene (c6h6) or kcl: benzene formic acid (hcooh) or butanol (ch3ch2ch2ch2oh): butanol
Benzene and Butanol is to be more soluble in carbon tetrachloride, CCl₄.
Carbon tetrachloride (CCl₄) is a nonpolar solvent. The solubility of a substance in a nonpolar solvent is primarily determined by its polarity.
Here are the solubility predictions for each pair:
Benzene (C₆H₆) vs KCl: Both benzene is nonpolar and it would likely have similar solubilities in CCl₄. While, KCl is a polar molecule.
Formic acid (HCOOH) vs Butanol (CH₃CH₂CH₂CH₂OH): Formic acid is a polar molecule (it contains a hydrogen bond-forming O-H group), while butanol is a nonpolar molecule. Formic acid would likely be less soluble in CCl₄ than butanol.
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for the molecule given above, what is the molecular geometry around the carbon on the left, the carbon in the center and the nitrogen on the right, in that order?
Trigonal bipyramidal tetrahedral. AI Suggestion for Response: The carbon atom in the molecule below has a trigonal bipyramidal structure as its molecular geometry.
How are the leftmost and rightmost carbon atoms in the molecule arranged in terms of molecular geometry?The geometry of the leftmost carbon atom in the molecule below is trigonal planar trigonal bipyramidal tetrahedral octahedral T-shaped. Trigonal planar trigonal bipyramidal tetrahedral octahedral T-shaped is the shape of the right-most carbon in the molecule below.
What is the shape of the CO2 molecule at position C?The bond angle of CO2 is 180 degrees because of its linear molecular geometry, which is structured as O = C = O. In addition, molecules with a 180-degree bond angle always exist in the geometry known as linear geometry, which has a planer-shaped structure.
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8. metallic gold reacts in a 1:1 stoichiometric ratio with metallic cesium to form the salt csau. this material is transparent with mechanical properties similar to that of table salt. the other two group 11 elements, silver and copper do not react with cesium in this manner. a. explain why gold is the only group 11 element with an isolable 1- anion. b. based on the reason you cited for part a, would you expect uranium metal to also have a high enough electrophilicity to form anions? why or why not. c. csau has the same lattice type as csi meaning that the x-ray diffraction pattern of csau has reflections in similar patterns to those of csi, but the diffraction patterns are slightly different. what are differences in the diffraction patterns between these two materials? why?
A. Gold is the only group 11 element that forms a stable 1- anion because it has the highest electrophilicity among the group 11 elements. Electrophilicity is the measure of an element's ability to attract electrons, and gold has the highest electrophilicity due to its electron configuration and its high electron affinity, which is the energy released when an electron is added to a neutral atom. Gold's high electrophilicity allows it to react with cesium, which is a highly electropositive metal, and form anionic species, such as CSau^-.
B. Based on the reason cited for part A, we would not expect uranium metal to form anions. Uranium has a lower electrophilicity than gold and its electron affinity is also lower, meaning it would be less likely to attract electrons from other elements and form anions.
C. The differences in the diffraction patterns between CSi and CSau are due to the fact that the two materials have different crystal structures. CSi has a sodium chloride-type crystal structure, while CSau has a cesium chloride-type crystal structure. This difference in crystal structure results in slight differences in the spacing between the atoms in the two materials, which leads to differences in the diffraction patterns. The diffraction pattern of a material provides information about its crystal structure, so the slight differences in the diffraction patterns between CSi and CSau are a result of the difference in their crystal structures.
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How many moles of SO4(it’s a little 4) are in 19.20 grams of SO4(little 4)?
According to the mole concept, there are 0.2 moles of SO₄ in 19.20 grams of SO₄.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
Number of moles is given as mass/molar mass= 19.20/96=0.2 moles.
Thus, there are 0.2 moles of SO₄ in 19.20 grams of SO₄.
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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.
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. The statement is true.
Elements with standard reduction potentials lower than that of water are susceptible to corrosion in aqueous environments because they are oxidized in the presence of water. This oxidation reaction results in the release of electrons, which then participate in a series of chemical reactions that can lead to the formation of corroded metal.
Additionally, these elements are also prone to oxidation by dissolved oxygen in the water, which can lead to the formation of metal oxides and the eventual corrosion of the metal surface. Even in the absence of another metal, these elements can still corrode in aqueous environments as a result of their lower reduction potentials and their tendency to react with water and dissolved oxygen.
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the density of mg is 1.74 g/cm3, the density of al is 2.70 g/cm3, the density of ti is 4.54 g/cm3, and the density of ba is 3.59 g/cm3. if the density of an unknown metal is 3.54 g/cm3, which metal is the sample likely to be?
The density of the unknown metal is closest to the density of Barium (Ba) which is 3.59 g/cm3. Therefore, the unknown metal is most likely to be Barium (Ba).
Density is a physical property of a material and can be used to identify a substance. The density of a substance is defined as its mass per unit volume, typically expressed in grams per cubic centimeter (g/cm³). When comparing the density of different substances, it is common to look for a density value that closely matches the density of the unknown sample.
In this case, we have the densities of four different metals: Magnesium (Mg), Aluminum (Al), Titanium (Ti), and Barium (Ba). The density of the unknown sample is 3.54 g/cm³.
When comparing this value to the density of the four metals, it is closest to the density of Barium (Ba), which is 3.59 g/cm³. Based on this information, it is reasonable to conclude that the unknown sample is most likely to be Barium (Ba).
It's important to note that while this comparison can provide useful information, it is not a foolproof method of identification. To definitively determine the identity of the unknown sample, additional analysis, such as chemical tests or spectroscopic analysis, may be necessary.
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the lighting of a match is an example of which of the following? select the correct answer below: a physical property an extensive property a physical change a chemical change
The correct answer is option d. The lighting of a match is an example of a chemical change.
Chemical change is referred as the chemical composition in which a substance is altered, which lead to the formation of new substances with different properties.
In the lighting a match, the reaction occured between the phosphorus sulfide on the match head and the oxygen in the air results in the production of heat and light, This reaction results in a change in the chemical composition of the match and the production of new substances such as sulfur dioxide and other oxidized sulfur compounds.
A chemical reaction is defined as a process in which one or more substances, which is also called as reactants, are converted to one or more different substances, known as products. Substances are either chemical elements or compounds.
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What is the electron geometry of the carbon in h_2co?
The electron geometry of the carbon atom in H2CO (formaldehyde) is tetrahedral.
The electron geometry of a molecule refers to the arrangement of its electron pairs around a central atom. The electron geometry of carbon in H2CO (formaldehyde) is tetrahedral, which means that the four electron pairs around the central carbon atom are arranged in a three-dimensional shape like a pyramid, with the hydrogen atoms attached to the carbon atom at the four corners. This tetrahedral arrangement results in the molecule having a trigonal planar shape, with the hydrogen atoms forming the three corners of the plane. The arrangement of the electron pairs around the central atom determines the molecule's shape and also affects its reactivity, as the electron geometry affects the distribution of electron density in the molecule. Understanding the electron geometry of molecules is important in predicting their chemical behavior and in understanding the interactions between different molecules.
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a. adding a uv absorbing coating to the plastic surface. b. including additives to the plastics composition that help prevent uv degradation. c. electrically connecting the plastic component to a sacrificial anode. which of the following approaches would be useful for improving a plastic's resistance to uv degradation? a. adding a uv absorbing coating to the plastic's surface. b. including additives to the plastic's composition that help prevent uv degradation. c. electrically connecting the plastic component to a sacrificial anode.
a.Adding a uv absorbing coating to the plastic's surface. b. including additives to the plastic's composition that help prevent uv degradation.
After an unforeseen period of time, UV radiation's peroxidative degradation, which results in the breaking of polymer chains, radical production, and molecular weight reduction, deteriorates mechanical qualities and renders materials worthless.
What substances are susceptible to UV degradation?
Numerous natural and synthetic polymers, including certain rubbers, neoprene, and polyvinyl chloride, are damaged by this process, known as UV degradation (PVC). These materials' colours may fade if exposed to too much light.
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a certain substance has a normal boiling point of and a molal boiling point elevation constant . a solution is prepared by dissolving some urea in of . this solution boils at . calculate the mass of urea that was dissolved. round your answer to significant digits.
The mass of urea that was dissolved is 636 grams.
The boiling point elevation of a solution can be calculated using the equation:
ΔTb = Kb * molality
Where ΔTb is the boiling point elevation, Kb is the molal boiling point elevation constant, and molality is the concentration of solute in the solution, expressed in moles of solute per kilogram of solvent.
The molality can be calculated from the mass of solute (m) and the mass of solvent (m0) using the equation:
molality = m / (m0 - m)
We know the boiling point of the solution and the boiling point of the pure solvent, so we can calculate the boiling point elevation:
ΔTb = 150.9°C - 150.4°C = 0.5°C
And then use the equation above to calculate the molality:
ΔTb = Kb * molality
0.5°C = 0.60°C·kgmol^-1 * molality
molality = 0.5°C / 0.60°C·kgmol^-1 = 0.83 mol/kg
Finally, we can use the equation for molality to calculate the mass of urea:
molality = m / (m0 - m)
0.83 = m / (750 g - m)
0.83 * (750 g - m) = m
m = 636 g
So, 636 grams of urea were dissolved in 750 grams of solvent X.
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Complete Question :
A certain substance X has a normal boiling point of 150.4°C and a molal boiling point elevation constant =Kb0.60·°C·kgmol−1. A solution is prepared by dissolving some urea NH22CO in 750.g of X. This solution boils at 150.9°C. Calculate the mass of urea that was dissolved.
each student in a class placed a 2.00 g sample of a mixture of cu and al in a beaker and placed the beaker in a fume hood. the students slowly poured 15.0 ml of 15.8 m hno3(aq) into their beakers. the reaction between the copper in the mixture and the hno3(aq) is represented by the equation above. the students observed that a brown gas was released from the beakers and that the solutions turned blue, indicating the formation of cu2 (aq). the solutions were then diluted with distilled water to known volumes. the students determined that the reaction produced 0.010 mol of cu(no3)2 . based on the measurement, what was the percent of cu by mass in the original 2.00 g sample of the mixture?
The percent of Cu by mass in the original 2.00 g sample of the mixture is approximately 120.75%.
Determining the Percentage of Copper in a MixtureIn this experiment, students placed a 2.00 g sample of a mixture of copper (Cu) and aluminum (Al) in a beaker and added 15.0 ml of 15.8 M HNO3(aq) to it. The reaction between the copper and the HNO3(aq) produced a blue solution, indicating the formation of Cu(NO3)2, and a brown gas, which was nitrogen dioxide (NO2). The students then diluted the solution with distilled water to a known volume and determined that the reaction produced 0.010 mol of Cu(NO3)2. By using the molar mass of Cu(NO3)2, the mass of copper in the original sample was calculated as 2.415 g. Finally, the percentage of copper in the original 2.00 g sample of the mixture was determined to be approximately 120.75% by dividing the mass of copper by the total mass of the sample and multiplying it by 100%.
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the intermolecular force(s) responsible for the fact that ch4 has the lowest boiling point in the set ch4, sih4, geh4, snh4 is/are . question 21 options: a) hydrogen bonding b) dipole-dipole interactions c) mainly hydrogen bonding but also dipole-dipole interactions d) london dispersion forces e) mainly london-dispersion forces but also dipole-dipole interactions
The intermolecular forces responsible for the fact that ch4 has the lowest boiling point in the set ch4, sih4, geh4, snh4 is/are london dispersion forces
All the molecules mentioned are non-polar molecules so there are no Hydrogen bonding (as there are no ionic bonds). London-dispersion force is a temporary attractive force. When the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles this causes London-dispersion force . It is also known as an induced dipole-induced dipole attraction. In simpler words biggest molecule will have the highest boiling point. The more protons and electrons, the stronger the effect.Therefore, Methane (CH4) with the smallest atomic size, would have the lowest boiling point.
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Question 1-7
When a metal and a nonmetal react, the
O metal, metal
O metal, nonmetal
Ononmetal, metal
O nonmetal, nonmetal
27
tends to gain electrons and the
tends to lose electrons.
When a metal and a nonmetal react, the metal tends to lose electrons and the nonmetal tends to gain electrons.
What is metal and non metal ?Elements are classified as metals or nonmetals, and it is critical to understand whether an element is a metal or a nonmetal. Metals (such as copper and aluminum) conduct heat and electricity well, whereas nonmetals (such as phosphorus and sulfur) are insulators.
Metals participate in chemical reactions and lose electrons, resulting in positively charged ions, whereas nonmetals accept electrons, resulting in negatively charged ions.
Thus, When a metal and a nonmetal react, the metal tends to lose electrons and the nonmetal tends to gain electrons.
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what volume (in ml) of 0.7 m barium hydroxide would neutralize 57 ml of 3.694 m hydrobromic acid? enter to 1 decimal place.
[tex]41.4 ml[/tex] volume of [tex]0.7m[/tex]barium hydroxide would neutralise [tex]57ml[/tex] of [tex]3.694m[/tex] Hydrobromic acid.
How to calculate the volume of barium hydroxide?
To calculate the volume of barium hydroxide needed to neutralise [tex]57 ml[/tex] of hydrobromic acid, we use the equation: [tex]M1V1 = M2V2[/tex]
where M1 and V1 represent the molarity and volume of the Hydrobromic acid, and M2 and V2 represent the molarity and volume of the barium hydroxide.
Substitution of the given values:
[tex]3.694 M x V2 = 0.7 M x 57 ml[/tex]
[tex]V2 = 41.4 ml[/tex]
Therefore, [tex]41.4 ml[/tex] of [tex]0.7 M[/tex] barium hydroxide is needed to neutralise [tex]57 ml[/tex] of [tex]3.694 M[/tex] Hydrobromic acid.
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question which is a disadvantage of natural gas? responses high sulfur emissions high sulfur emissions groundwater contamination groundwater contamination high carbon dioxide emissions high carbon dioxide emissions significant waste disposal
One disadvantage of natural gas is significant waste disposal. Natural gas extraction and processing generates a significant amount of waste in the form of drill cuttings, wastewater, and air pollution.
This waste can be harmful to the environment if not properly disposed of, potentially contaminating soil and water resources. The release of pollutants such as methane and volatile organic compounds during the production and transportation of natural gas can also contribute to air pollution and have negative impacts on public health. Additionally, while natural gas is a cleaner burning fossil fuel compared to coal and oil, it still releases carbon dioxide into the atmosphere, contributing to climate change.
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When ethane ( ) burns, it produces carbon dioxide and water: how many moles of water will be produced when 8 moles of ethane are burned? a. 48 moles b. 56 moles c. 64 moles d.24 moles
Due to the ethane balanced equation's 1:1 mole ratio between CO and CO2, 4.60 mol of CO will completely burn to create 4.60 mol of CO2.
When 14 moles of oxygen and 5 moles of ethane are combined, how many moles of carbon dioxide result?800K is achieved by heating 5 moles of ethane and 14 moles of oxygen. B: Include 2 moles of carbon dioxide in the mixture used for the reaction. C: The reaction will now start and result in the production of 12 moles of ethane and 46 moles of carbon dioxide.
C2H6 O2 CO2 H2O is what kind of reaction?An illustration of a combustion reaction is shown here, in which ethane reacts with oxygen to produce carbon dioxide and water.
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an electron and a positron annihilate each other, creating two identical gamma photons in the process. what is the wavelength of these photons?
When a positron and an electron collide and annihilate each other, they create two gamma photons with equal energy and the same wavelength.
The wavelength of these photons is equal to the Planck constant divided by the total energy of the two photons, which is equal to the sum of the masses of the positron and electron.
This is equal to 6.626 × 10-34 J·s divided by 511 keV, which is equivalent to 0.124 femtometres (1.24 × 10-14 metres).
The annihilation of the positron and electron results in the release of two gamma photons with the same wavelength and energy. This energy is equal to the sum of the masses of the positron and electron, as dictated by the law of conservation of energy.
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a bcc metal has an atomic weight of 55.845 g/mol and a density of 7.89 g/cm3. what is the radius of this atom in nm?
a bcc metal has an atomic weight of 55.845 g/mol and a density of 7.89 g/cm3. The radius of this atom is 0.125 nm.
V = 4/3 * * r3 is the formula for a sphere's volume, where r is the sphere's radius.
The volume of a single atom can be determined using the metal's density and atomic weight.
We can determine the volume (V) of one atom using the formula V = m / d given the density (d) = 7.89 g/cm3 and atomic weight (m) = 55.845 g/mol.
The radius of the atom can then be determined using the computed volume and the volume of a sphere formula: r = (3V / 4)(1/3)
The atom's radius is 0.125 nm.
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what information is necessary to relate the rate of disappearance of reactants to the rate of appearance of products?
The information that necessary to relate the rate of disappearance of reactants to the rate of appearance of products is the mole ratio from the balanced equation.
The ratio of any two compounds' mole quantities in a balanced chemical reaction is known as the mole ratio. In many chemistry situations, mole ratios serve as conversion factors between products and reactants. A comparison of the ratios of the molecules required to accomplish the reaction is given by the balancing chemical equation.
The rate of a chemical reaction is calculated by dividing the rate of change in a reactant's or product's concentration by the coefficient from the equation's balanced state. To ensure that the reaction rate remains a positive quantity, a negative sign is used with reactant change rates and a positive sign with product change rates.
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the fish in the lake at the local park are dying, so a professor from the local college comes to investigate. first, she measures the dissolved oxygen because she wants to check for the .
In a case whereby the fish in the lake at the local park are dying so, a professor from the local college comes to investigate, and first she measures the amount dissolved oxygen because she wants to check the possibility of eutrophication.
Harmful algal blooms, dead zones, and fish kills are the results of a process known as eutrophication. Basically, eutrophication occurs when the environment becomes enriched with nutrients, increasing the amount of plant and algae growth to estuaries and coastal waters.
Eutrophication is a process of pollution that occurs when a lake or stream becomes over-rich in plant nutrient, as a consequence of it becomes overgrown in algae and other aquatic plants. Due to this plants die and decompose. In decomposing of the plants, it robs the water of oxygen and the lake, river or stream becomes lifeless.
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If we triple the number of moles in the gas vessel at constant pressure, what would the new volume be?
If we triple the number of moles in the gas vessel at constant pressure, the new volume of gas will be three times the original volume.
PV = nRT is the equation for an ideal gas. In this equation, P stands for the ideal gas's pressure, V for the ideal gas' volume, n for the total amount of the ideal gas expressed in moles, R for the universal gas constant, and T for temperature.
When the pressure is expressed in kPa, the ideal gas constant is calculated to be 8.314J/Kmol.
The volume is inversely proportional to the number of moles if we consider the pressure to be constant.
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what is the flash point of a substance?
The term "flash point" refers to the lowest temperature at which a liquid emits enough vapor in a test vessel to create an ignitable mixture with the air close to the liquid's surface.
The flash point of a liquid is a parameter that can be used to get a broad idea of how flammable or combustible it is. Below the flash point, there is an inadequate supply of vapour to sustain a combustion reaction. Once the liquid reaches a temperature that is greater than its flash point, it will begin to produce sufficient vapour to sustain combustion.
In order to determine a liquid's flash point, it must first be heated to a predetermined temperature in a laboratory setting before being subjected to an open flame. In order to simulate the environment of both the storage facility and the working environment, the test can be carried out in either a "open cup" or a "closed cup" apparatus, or in both.
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A carbon skeleton is covalently bonded to both an amino acid and a carboxyl group. When placed under water, it...
An amino group & a carboxyl group are both covalently connected to a carbon skeleton. Due to the carboxyl group, it would only act as an acid when placed in water.
Describe the carboxyl group.Carboxyl groups are composed of two functional groups attached to a single carbon atom. They are also referred as hydroxyl (single-bonded OH) and carbonyl (double-bonded O) groups. A carboxyl group (COOH) gets its name from two groups, a carbonyl group (C=O) and a hydroxyl group. They are made up of carboxylic acids and amino acids.
What substances comprise a carboxyl group?The carbon in the carboxyl group is joined by both an oxygen & a hydroxyl group. Simply said, hydroxyl groups are made up of an oxygen and a hydrogen.
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how many electrons can fit into a single 4p orbital?
Answer:
Explanation:
The number of electrons that can fit into a single 4p orbital is determined by the electron configuration and the laws of quantum mechanics. According to the Pauli Exclusion Principle, no two electrons in an atom can have the same set of quantum numbers.
In a 4p orbital, there are four quantum numbers that describe the electron: the principal quantum number (n), the azimuthal quantum number (l), the magnetic quantum number (m), and the spin quantum number (s).
For a 4p orbital, the principal quantum number is 4 and the azimuthal quantum number is 1. Based on these values, the number of possible magnetic quantum numbers (m) is limited to a range of -1 to +1. So, in a single 4p orbital, a maximum of two electrons can be accommodated, each with opposite spin.
In conclusion, a maximum of two electrons can fit into a single 4p orbital.
what is the difference between tonic water and club soda?
The difference with tonic water and club soda is that tonic water also has minute quantities of quinine. Quinine, a natural substance in cinchona tree bark, is responsible for the tonic's strong bitterness.
What uses are there just for tonic water?Drinking tonic water only has one biggest advantage, which is hydration. This should keep you nourished and improve your ability to concentrate more often than soda or juice because it's still water. It is kind of a this double sword because it has a sugar that is equivalent to those.
What draws Indians tonic water?The beverages had their start here within 1825 when British Army troops stationed in India started experimenting quinine with sugar, water, and gin to make an inadvertently tasty sundowner that also acted as a malaria preventative.
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Ammonia ( ) can be produced by the reaction of hydrogen gas with nitrogen gas: a chemist reacts 2.00 mol with excess . the reaction yields 0.80 mol . what is the percent yield of the reaction? a. 25% b. 40% c. 60% d. 80%
Chemical equation: 3H₂ + N₂ → 2NH₃ Now we will compare the moles of ammonia with hydrogen from balance chemical equation: H₂ : NH₃ , 3 : 2 2 : 2/3×2 = 1.3 mol , Percent yield = 60.%.
How is percent yield calculated? What is it?The % ratio of the theoretical yield to the actual yield is known as the percent yield.It is calculated as the theoretical yield multiplied with 100% divided by the experimental yield.The percent yield equals 100% if the theoretical and actual yields are equal.
Which percent yield* formula is correct?Percent yield is calculated as follows: percent yield = actual yield / anticipated yield multiplied by 100.We're going to discuss yield in percentage.The ratio between actual yield versus theoretical yield is known as percent yield.
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the very common mineral shown in this photograph is light colored, transparent, has a hardness of seven, and fractures rather than cleaves. it does not effervesce. what mineral is it?
Quartz is the translucent, light-colored crystal with a strength of seven that is depicted in this image.
What purposes does the mineral quartz serve?Quartz is used in a broad variety of industries, including jewelry production and gemstones for its ability to gleam, brick manufacturing inside the refractory industry because of its physical toughness, and watches & clocks because of its piezoelectric feature.
A mineral or even a rock, is quartz?Typical minerals include calcite, quartz, feldspar, silica, amphibole, and olivine. An accumulation of one or more minerals, or a mass of undifferentiated mineral materials, is referred to as a rock.Sandstone, granite, basalt, and limestone are examples of common rocks.
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a certain liquid has a normal boiling point of and a boiling point elevation constant . calculate the boiling point of a solution made of of potassium bromide () dissolved in of . round your answer to significant digits.
The boiling point of the solution is 136.5°C.
The boiling point of X: 134.5°C
Molal boiling point elevation constant (Kb): 1.36·°C·kg. mol⁻¹
We can calculate the elevation in the boiling point (ΔT) using the following expression.
ΔT = Kb × m
where,
m is the molality
The molar mass of urea is 60.06 g/mol. The moles of urea corresponding to 76 g are:
76 g × (1 mol/60.06g) = 1.3 mol
The mass of the solvent (X) is 850 g = 0.850 kg.
The molality is:
m = 1.3 mol / 0.850 kg = 1.5 mol/kg
Then,
ΔT = Kb × m
ΔT = 1.36·°C·kg.mol⁻¹ × 1.5 mol/kg
ΔT = 2.0 °C
The boiling point of the solution is
134.5°C + 2.0°C = 136.5°C
The boiling factor of a substance is the temperature at which the vapor pressure of a liquid equals the stress surrounding the liquid and the liquid adjustments into a vapor. The boiling point of a liquid varies relying on the encompassing environmental stress.
The boiling factor for any material is the temperature point at which the material transforms into the gas segment inside the liquid segment. This takes place at one hundred stages centigrade for water. The boiling point of a natural substance is the temperature at which the substance transitions from a liquid to the gaseous phase. At this factor, the vapor strain of the liquid is the same as the applied stress at the liquid. The boiling factor at a stress of 1 ecosystem is called the normal boiling factor.
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Complete Question:
A certain substance X has a normal boiling point of 134.5°C and a molal boiling point elevation constant =Kb1.36·°C·kgmol−1. Calculate the boiling point of a solution made of 76. g of urea NH22CO dissolved in 850. g of X . Be sure your answer has the correct number of significant digits.
a 25.0-ml sample of 1.00 m nh3 is titrated with 0.15 m hcl. what is the ph of the solution after 15.00 ml of acid have been added to the ammonia solution? [kb(nh3)
After 15.00 ml of acid has been added to the ammonia solution, the solution's ph is 10.26.
What is the formula for pH value?The pH scale is an easy way to show how acidic or basic a solution is. The pH of a solution can be determined by taking the negative logarithm of the concentration of the hydronium ion, or pH = -log[H3O+].
What is pH as a whole?Potential of Hydrogen is the full form of pH. The negative logarithm of the concentration of H+ ions is the pH. As a result, the power or strength of hydrogen is used to explain pH's meaning. The chemical conditions of a solution are reflected in the pH, an important quantity. Chemical behavior, microbial activity, the availability of nutrients, and biological functions are all influenced by pH.
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what do the elements highlighted in red have in common?
The quantity of outer electrons is the same for every atom in a row. The following isotope in a phase is less iron than the one before it and has one extra proton.
Who or what is an electron?A negative charge atom known as an electron can either be free or attached to an atom (not bound). Of the three principal types of components inside an atom is an atom that is bonded to it; its other two are quarks and neutrons.
What sort of thing is an electron like?The smallest elemental component of an atom, the electron has a negative charge. In a neutral atom, there are an equal distribution of protons and electrons. the atom of hydrogen.
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