Answer:
This would be 3S^1.
Explanation:
It would be 3s^1 because that is how the orbitals are formed.
It would be form lowest to highest: s,p,d,f.
Then it would go to highest, 2 =s, 6=p, d =10, f= 14.
So, it would be: 1s2, 2s2, 2p6, 3s2.
Since 3s2 isn't on here, then 3s1 would become the answer.
What is the name and function of this laboratory glassware
Answer: Protects your eyes from chemical splashes, Must be worn during all labs, from start to lab checkout, in which chemicals, glass or heating of substances is involved. No exceptions!!
HELPPP
Ferric chloride combines with water in a reversible reaction to produce ferric hydroxide and hydrochloric acid as shown.
FeCl3 + 3H₂0 Fe(OH)3 + 3HCI
Which reaction must occur at the same time as the formation of ferric hydroxide?
(1 point)
O Fe(OH)3 + 3HCI → FeCl3 + 3H₂O
O FeCl3 + 3HCI → Fe(OH)3 +3H₂O
O FeCl3 Fe + 3Cl
O 2H₂O → H₂ + O₂
Ferric chloride combines with water in a reversible reaction to produce ferric hydroxide and hydrochloric acid as shown.
[tex]FeCl_{3}[/tex] + 3H₂O → [tex]Fe(OH)_{3}[/tex] + 3HCI
The reaction which must occur at the same time as the formation of ferric hydroxide are given below .
[tex]FeCl_{3}[/tex] → Fe · + Cl ·
So , option C is correct one .
The water ionizes to hydrogen and hydroxide ions and the ferric chloride in the water ionizes to iron, or ferric and chloride ions. As a result, the solution becomes more hydrogen ion-rich than it was before the precipitation, which causes the solution to become acidic.
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Answer:
The real answer is Fe(OH)3 + 3HCI - FeCl3 +3H2O
Explanation:
I took the test and this was the correct answer.
A weak acid has a molar mass of 162 g mol-1. Analysis of a 0.8821 g sample showed the composition by mass is 0.0220 g H, 0.3374 g P, and the remainder to be O. Determine its empirical and molecular formula.
Empirical
Molecular
1. The empirical formula of the weak acid is H₂PO₃
2. The molecular formula of the weak acid is H₄P₂O₆
Data obtained from the question Mass of compound = 0.8821 gH = 0.0220 gP = 0.3374 gO = 0.8821 - (0.0220 + 0.3374) = 0.5227 gEmpirical formula =? Empirical formula =? Molecular formula =?1. How to determine the empirical formulaThe empirical formula of the compound can be obtained as follow:
Divide by their molar mass
H = 0.0220 / 1 = 0.022
P = 0.3374 / 31 = 0.01
O = 0.5227 / 16 = 0.03
Divide by the smallest
H = 0.022 / 0.01 = 2
P = 0.01 / 0.01 = 1
O = 0.03 / 0.01 = 3
Thus, the empirical formula of the compound is H₂PO₃
2. How to determine the molecular formula Empirical formula = H₂PO₃Molar mass of compound = 162 g/molMolecular formula =?Molecular formula = empirical × n = mass number
[H₂PO₃]n = 162
[(1×2) + 31 + (16×3)]n = 162
81n = 162
n = 162 / 81
n = 2
Molecular formula = [H₂PO₃]n
Molecular formula = [H₂PO₃]₂
Molecular formula = H₄P₂O₆
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Which of these formulas contain 2 nitrogen atoms?
1. Co(NO3)₂
II. (NH4)₂CO3
III. (NH4)3PO4
IV. AI(NO3)3
V. NH₂NO3
Select THREE correct answers.
Answer: I, II, V
Explanation:
Which of the following best describes a community?
• A. An interacting group of populations that occupy the same area
© B. A group of organisms that interbreed and have common
characteristics
• C. A group of organisms that interact with nonliving parts of the
environment
• D. All of the individuals of the same species that inhabit an
area
The following best describes a community
community is best describes as An interacting group of populations that occupy the same area
individuals of the equal species dwelling together contain a populationA network includes a doubtlessly interacting populations of different speciespopulation consists of individuals of the same species that live inside the same area, proportion the same habitat and sources, and probably interbreed with each other.A community and the nonliving elements with which it interacts is known as a ecosystemspecies is all of the populations of a particular type of organism.If a populace is experiencing exponential boom, it approach the larger the population, the faster it growsTo know more about population visit :
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How do i solve. To get the answer need answer
The correct answer is 329.4 Cal.
Remember that specific heat is the ratio of the amount of heat needed to raise a body's temperature by one degree compared to the amount of heat needed to raise the temperature of an equivalent mass of water by one degree, or that specific heat capacity is the amount of heat energy needed to raise a material's temperature by one kelvin (K) per kilogramme.
Mass of sample=50.00-g
Specific heat of metal=0.108 cal/g °C
Change in temperature=78.0 °C-17.0°C=61.0°C
Heat Released by metal can be calculated as follows:
Heat Released = Mass of sample x Specific heat x Change in temperature
Heat Released = 50.00 g x 0.108 cal/g °C x 61.0°C
Heat Released = 329.4 Cal
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C4H8(g)⟶2C2H4(g)
has an activation energy of 262 kJ/mol.
At 600.0 K, the rate constant, , is 6.1×10−8 s−1. What is the value of the rate constant at 820.0 K?
The value of the rate constant at 820.0 K is 0.2 s^-1
Applying the Arrhenius equation, which is...
k = Ae-Ea/RT
Applying the formula, we get
lnk2 = lnk1 - (Ea/R)(1/T2 - 1/T1)
Applying the values, we get
ln k2 = ln 6.1x10^-8 - (2.62x10^3/8.314)(1/820 - 1/600)
Calculating the value, we get...
ln k2 = -0.31
Taking power e, we get
k2 = 0.2 s^-1
Arrhenius equation relates the temperature and activation energy of a reaction.It is helpful in studying the different parameters related to reaction.Activation energy is the minimum required to attain to form the product.To learn more about the activation energy visit:
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what percentage of a sample is remaining if you use the decimal (0.2536) and the fraction (3/7) of that sample
The percentage left is 57%.
What is the percentage remaining?We know that a fraction is a part of a whole. Let us in this case take the whole as one and then the fraction that we remove out of it is 3/7. We now have to find the percentage that remains.
Thus'
Fraction that remains = 1 - 3/7 = 4/7
Hence;
Percentage that is left = 4/7 * 100
= 57%
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A student uses a diagram to show the scale sizes of the planets. Which planet’s diameter would be approximately the distance across the United States?
The planet’s diameter would be approximately the distance across the United States Mercury.
What is planet mercury known for?
It is known to be the Fastest Planet as well as the one that is very close to the Sun.Mercury is one that tends to travel a lot faster than others. Mercury is seen as one that is known for being the fastest planet as well as having the shortest distance to travel around the Sun, which is about 88 days.Therefore, The planet’s diameter which would be approximately the distance of the United States is Mercury.
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How many moles of calcium do you have if you measure out 19.13 g of calcium?
Enter your answer in decimal form with the correct number of sig figs. Use the proper abbreviation for the units.
When you were young you may have had your own theory about why plants are green. Then, as you learned more, you kept ideas that were correct, but replaced ideas that were incorrect. Atomic theory also changed as scientists improved their understanding. What incorrect idea in Bohr’s understanding of the atom was replaced in later theories?
Atoms can not be divided is the incorrect idea in Bohr’s understanding of the atom.
Bohr believed that electrons circled the nucleus in orbits. According to current atomic theory, electrons don't follow predetermined routes.
Bohr believed that electrons traveled in circular paths around the nucleus, but current theory suggests that the structure of atomic electrons is more to 3D standing waves.
Bohr improved on Rutherford's atomic model. The majority of the atom's mass is concentrated in its nucleus, which we now refer to as the center of the atom, and electrons surround the positive mass in a manner to a cloud. Bohr's use of the quantification energy to explain the model was his most important contribution. According to his theories, electrons circling the nucleus have quantized potential and kinetic energies.
The Heisenberg Uncertainty Principle is first violated by the Bohr model because it assumes that electrons have a known orbit and radius. The Bohr Model is less effective at drawing diagrams of larger atoms and gives an incorrect value for the ground state orbital angular momentum.
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Is there anything wrong in this definition, if so, write the correct form: Intensive properties do not depend on the amount of matter present. Such properties include the melting point, boiling point, density, and ability to conduct electricity and to transfer energy as heat. Intensive properties are the same for a given substance regardless of how much of the substance is present.
Help will give brainly!!
Answer:
The definition and all examples are correctly mentioned only one mistake is spotted which is transfer of energy as heat included in Intensive Property which is wrong.
Explanation:
Intensive Property: Intensive properties are those properties which are Independent of the amount substance present.
For e.g. The melting point of ice on standard temperature & pressure is constant i.e. 0°C.
1 gram of ice will melt at 0°C so will be 1 kilogram ice. Hence melting point & similarly boiling point also is an Intensive Property.
before talking about Density let's understand Extensive properties.
Extensive Property: Extensive properties are those properties which are Dependent of the amount substance present.
for e.g. Volume, Weight, Mass, Length, Energy, Enthalpy, Entropy etc.
When One extensive divided by another extensive Property then perticular that property of substance is also intensive property.
Now we know that,
[tex] \sf Density = \frac{Mass}{volume} [/tex]
Where mass & volume both are extensive properties, hence density is an intensive property.
Ability to conduct electricity is called as Thermal Conductivity which is an intensive property.
The thermal conductivity of a perticular material does not change it varies material to material.
Transfer of energy as heat, let's have quick look at heat & temperature relation given by,
[tex]C = \frac{Q}{\Delta T} [/tex]
Where C is specific heat capacity which is an intensive property & specific heat is the ratio of added heat to the change in temperature & Heat is an Extensive property.
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Part C
Convert 8x10-4 kg to micrograms.
Express your answer with the appropriate units. Use the appropriate metric symbols for the units.
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What is the limiting reactant if 0.5 g Al is reacted with 0.5 g CuCl2?
What is the theoretical yield of copper produced by this reaction?
1. The limiting reactant is CuCl₂
2. The theoretical yield of copper is 0.24 g
Balanced equation2Al + 3CuCl₂ —> 2AlCl₃ + 3Cu
The following were obtained from the balanced equation:
Molar mass of Al = 27 g/mol Mass of Al from the balanced equation = 2 × 27 = 54 gMolar mass of CuCl₂ = 63.55 + (2 × 35.5) = 134.55 g/mol Mass of CuCl₂ from the balanced equation = 3 × 134.55 = 403.65 gMolar mass of Cu = 63.55 g/mol Mass of Cu from the balanced equation = 3 × 63.55 = 190.65 gFrom the balanced equation above,
54 g of Al reacted with 403.65 g of CuCl₂ to produce 190.65 g of Cu
1. How to determine the limiting reactantFrom the balanced equation above,
54 g of Al reacted with 403.65 g of CuCl₂
Therefore,
0.5 g of Al will react with = (0.5 × 403.65) / 54 = 3.74 g of CuCl₂
From the above calculation, we can see that a higher amount (i.e 3.74 g) of CuCl₂ than what was given (i.e 0.5 g) is needed to react completely with 0.5 g of Al.
Thus, CuCl₂ is the limiting reactant.
2. How to determine the theoretical yield of copperFrom the balanced equation above,
403.65 g of CuCl₂ reacted to produce 190.65 g of Cu
Therefore,
0.5 g of CuCl₂ will react to produce = (0.5 × 190.65) / 403.65 = 0.24 g of Cu
Thus, the theoretical yield of Cu is 0.24 g
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•) At 741 torr and 44°c, 7.10gol a gas occupy a volume of 5.40ml
what is the moler mass of the gas?
3.5 × 10^6 g
according to ideal gas equation, PV = nRT
where, p is pressure v is volume, n is mole of gas, r is gas onstant and t is temperature.
Pressure (p) = 741 Torr = 1 bar
Volume (V) = 5.40 ml= 0.0054litre
Amount of substance (n) mol = ?
Temperature (T) 44°C= 371kelvin
so by putting all values in equation. PV = nRT
= 1 × 0.0054 =n ×8.31 ×371
n ≈ 0.000002 = 2.0 × 10^-6
now, n is mole of gase,
mole = given mass ÷ molecular mass
given mass = 7.10g
molecular mass = given mass ÷ mole
7.10 ÷ 2.0 × 10^-6
= 3.5 × 10^6 g
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Water has a density or a mass per unit volume corresponding to 1.000 g/mL at
4°C. This means that one gram of water corresponds to one milliliter of volume.
Obtain the mass of a clean, dry 100-mL graduated cylinder on the electronic
balance. Add 50 mL of deionized water to the graduated cylinder and remeasure
its mass. Calculate the mass of the water by subtracting the mass of the empty
cylinder from the mass of the cylinder plus the added water. Find the density of
water by dividing the mass of water by the volume of water. Enter the values in
the following table:
Mass of the graduated cylinder plus water (9) 72.6979
Mass of empty graduated cylinder (g)
123,5469
49.161 9
Mass of water (g)
Density of watek(g/mL)
Temperature (°C)
22.39 °C
Answer:
b
Explanation:
ason solved this problem by changing 6/4 to 1.2. He then added 1.2 to 0.68 and got 1.88.
This answer is incorrect. What did he do wrong?
how many grams is there if you have 2.85x10^-4 with 176g/mol
0.05016 grams is there if you have 2.85x10^-4 with 176g/mol.
The mass of a certain molecule is its molecular mass, which is expressed in daltons. Because they contain various isotopes of an element, multiple molecules of the same substance can have distinct molecular weights.
mole = 2.85x10^-4
mol. weight = 176g/mol
Formula,
mole = weight taken / mol. wt of the compound
2.85x10^-4 = weight taken / 176g/mol
weight taken = 2.85x10^-4 x 176g/mol
=0.05016 grams
0.05016 grams is there if you have 2.85x10^-4 with 176g/mol.
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A nugget of gold occupies 5.64 mL of water and weighs 108.8521g. Its density is
The density of a nugget of gold which occupies 5.64 ml of water and weighs 108.85 g is 19.29 g/cm^3.
The density of a gold nugget can be calculated by using the following formula:
Density of nugget = Mass of gold nugget/Volume occupied by gold nugget
Here,
the mass of gold is given to be 108.85 grams and the volume occupied by gold is given to be 5.64 ml or 5.64 cm^3.
Putting these values in the above equation
Density = 108.85 g / 5.64 cm^3
Density = 19.29 g/cm^3
Thus, the density of a nugget of gold which occupies 5.64 ml of water and weighs 108.85 g is 19.29 g/cm^3.
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1. Use the following information to answer 3 questions. When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction:
2KClO3(s) → 2KCl(s)+ 3O2(g)
If 12.25g potassium chlorate decomposes, how many grams of oxygen will be release?
(A) 1.60 g (B) 3.20 g
(C) 4.80 g (D) 18.37 g
4.80 grams of oxygen will be release.
When heated in a closed container in the presence of a catalyst, potassium chlorate decomposes into potassium chloride and oxygen gas via the following reaction:
2KClO3(s) → 2KCl(s)+ 3O2(g)
mass of potassium chlorate = 12.25g
mole of KClO3 = 12.25/122.5 = 0.1 mol
2 mole KClO3 (consumed) = 3 mole O2 (produced)
1 mole KClO3 = 3/2 mole O2
0.1 mole KClO3 = 0.1*1.5 mole O2
= 0.15 mole O2
mass of O2 = 0.15 * 32 = 4.80 grams
4.80 grams of oxygen will be release.
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Name 3 Rectangular Items that are something you can hold. And then name those items' Length, Width, Height, Area, or Volume.
Name 2 Triangular Items that are something you can hold. And then name those items' Length, Width, Height, Area, or Volume.
Name 3-Dimensional Rectangular Items that are something you can hold. And then name those items' Length, Width, Height, Area, or Volume.
Answer:To find the volume of a rectangular prism, we multiply the length of the prism by the width of the prism by the height of the prism.
honeslty
Explanation:
What data would be most helpful to support the claim that the population of a certain plant is dependent on the rainfall in its habitat?
OPTIONS
The average amount of water absorbed by the roots and given off by the leaves of these plants
The amount of water retained in the soil in the area where the plants live
Rainfall amounts and number of these plants in a certain habitat over several years
The heights and number of leaves produced by these plants under different moisture conditions
Explanation:
make up some of your own signs which can warns people about the dangers of river an ocean a large snake hiding in the bush
The difference between oxygen and ozone
Differences between oxygen and ozone
oxygen exists as a diatomic molecule whereas ozone exists as triatomic molecules.oxygen mass is 32 amu on the other hand ozone has 48 amuOxygen has no odor but ozone has a very sharp odor. when oxygen atoms react with oxygen molecules then ozone forms. The average length of an O=O double bond is 121 pm on the other hand ozone exists in resonance ozone is a polar molecule and have stronger intermolecular forces. The contribution of the electron pair from the central oxygen atom leaves a small positive charge on the central O atom. hence ozone molecules become dipole whereas diatomic oxygen is non-polar.To know more about oxygen visit :
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Draw the structural formula for cis-1,3-dimethylcyclopentane
Aliphatic compounds, on the other hand, are organic substances whose carbon atoms link with one another in open chains, either straight or branched, as opposed to containing a benzene ring. Aromatic compounds are organic substances with a planar unsaturated ring of atoms that is stabilized by an interaction of the bonds forming the ring. As a result, the primary distinction between aromatic and aliphatic chemicals is that aromatic compounds lack a cyclic structure while aliphatic compounds have straight, branching, or cyclic structures. Additionally, while the majority of aliphatic molecules are odorless, all aromatic compounds have a sweet, pleasant fragrance.
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A 4.000-mL urine sample from a person suffering from diabetes mellitus has a mass of 4.007 g.
Express your answer using four significant figures.
The concentration of the urine is determined as 1.002 g/ml.
What is concentration?The concentration of a chemical substance expresses the amount of a substance present in a mixture.
What is the urine concentration?The concentration of the urine is determined from the ratio of mass to volume of the urine or density of the urine.
Urine Concentration = mass / volume
Urine concentration = 4 .007 g / 4 ml
Urine concentration = 1.002 g/ml
Thus, the concentration of the urine is determined as 1.002 g/ml.
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The complete question is below:
determine the concentration of the urine.
Billy prepares four (4) different concentrations of solutions. Which solution is
the most concentrated?
A. 35 g of salt in 100 ml of water
B. 40 g of salt in 100 ml of water
C. 50 g of salt in 100 ml of water
D. 75 g of salt in 100 ml of water
Answer: [D]: " 75 g of salt in 100 mL of water. "
____
Explanation:
By looking at the answer choices—we can tell that all 4 (four) values for the "solvent"—[in this case: "100 mL of water".].
Note: As a general rule—and at this point in our problem—
The answer would be:
The solution with the most 'concentration' of solute—per the same volume of solvent—would be the most 'concentrated' solution—
would be Answer choice: [D]: " 75 g of salt in 100 mL of water."
Note: Answer Choice: [D]—has the most solute (grams of salt)—compared with the 'other values' given in the 'other' answer choices.
→ Specifically, refer to the other answer choices:
→ " [D: 75 g] > [C: 50 g] > [B: 40 g] > [A: 35 g ] ".
____
Wishing you well in your academic pursuits—and within the "Brainly" Community" !
____
Calculate the mass of potassium hydroxide, KOH, required to prepare 174.59 cm3 of a 0.864 mol dm-3 solution.
Taking into account the definition of molar concentration and molar mass, the mass of potassium hydroxide, KOH, required to prepare 174.59 cm³ of a 0.864 mol/dm³ solution is 8.45988 grams.
Definition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by:
Molarity= number of moles÷ volume
Definition of molar massThe molar mass of substance is defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Mass of potassium hydroxideIn this case, you know that:
Molarity= 0.864 mol/dm³Volume= 174.59 cm³= 0.17459 dm³ (being 1 cm³= 0.001 dm³)Replacing in the definition of molar concentration:
0.864 mol/dm³= number of moles÷ 0.17459 dm³
Solving:
0.864 mol/dm³ ×0.17459 dm³= number of moles
0.1508 mol= number of moles
The molar mass of KOH is 56.1 g/mol. So, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 56.1 grams, 0.1508 moles of the compound contains how much mass?
mass= (0.1508 moles×56.1 grams)÷ 1 moles
mass= 8.45988 grams
In summary, the mass of potassium hydroxide, KOH, required to prepare 174.59 cm³ of a 0.864 mol/dm³ solution is 8.45988 grams.
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The density of silver is 10.49 g/cm³. What is the mass of a piece of silver with a volume of 4.83 cm³?
Density is a physical property that relates the mass of a substance with the volume occupied by the mass of the substance. The density of the substance can be used to examine the purity of the substance.
expaln the conductivity of magnesium
Magnesium is not a good conductor. Hence, the conductivity of magnesium is not good.
Magnesium is placed in group 2 of the periodic table. It has 2 valence electrons which are in the fully filled s-subshell. When the subshell is fully filled, the electrons are not available to move to conduct. For example, group 1 has half filled subshell which allows the electrons to move.
But, how does magnesium conduct? As its subshell is fully filled and therefore no electrons are available to move.
In group 2 metals, there is a property called s-p hybridization. The s- and p- subshells overlap so that metals can now move to the unfilled states of the p-subshell.
Hence, magnesium is not a good conductor.
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Describe a chemical change using atoms and molecules?
Explanation:
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
Answer:
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.
Explanation:
Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.
145 lb adult takes 200 mg tablet is equal to ug per kg
The calculated medication dose is 3.010³g/kg
Patients receive medications either as a dosage or as a single dose. These two terms have various connotations. A dosage is a set amount of medication administered all at once. It is a singular value for mass or volume. It can alternatively be described as the mass or volume of the medicine divided by the patient's body weight. A drug's dosage is the precise quantity, number, and frequency of doses given over a precise period of time.
The dose (one time) of medication for an adult patient is the subject of this question. The patient mass is given in pounds, and the drug mass is supplied in milligrams; m drug = 200 mg
145 lbs., patient
In order to respond to this query, we convert the patient's mass to kilograms and the drug mass to micrograms:
Drug = 200 mg, 10³ mg, and 2.00, 10⁵ g
145 lb patient = kg/2.20 lb = 65.9 kg
The medication dose is:
mdrug Mpatient = 2.0010⁵g/65.9kg
= 3.010³g/kg
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