Answers2003350 Chemistry HONORS Sem 1 - MarezThe Historical Development of Atomic Theory

The Historical Development of Atomic Theory — Unit test Answers

15 verified answers
1
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Consider the equation below.Zn + H2SO4 ZnSO4 + H2The mole ratio of zinc to zinc sulfate is

Question illustration
A
1:1.
B
1:2.
C
2:1.
D
3:1.
2
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The following balanced equation shows the formation of sulfur dioxide.S + O2 SO2How many moles of sulfur are needed to produce 15.0 mol of sulfur dioxide?

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A
7.50 mol
B
10.5 mol
C
15.0 mol
D
30.0 mol
3

The ideal gas constant, R has several different values that could be used. Which quantity causes these differences?

A
pressure
B
temperature
C
volume
D
moles
4

Consider the reaction below.2Al2O3 4Al + 3O2How many moles of oxygen are produced if 11.0 mol of Al are produced?

Question illustration
A
8.25 mol
B
11.0 mol
C
14.7 mol
D
16.5 mol
5

Which law is described by saying that when the pressure of a gas in a sealed container is cut in half, the gas will double in volume at a steady temperature?

A
Boyle’s law
B
Charles’s law
C
Dalton’s law
D
Gay-Lussac’s law
6

Consider the balanced equation below. What is the mole ratio of PCl3 to PCl5?

Question illustration
A
1:1
B
2:1
C
3:5
D
5:3
7

What is the relationship between a mole and Avogadro’s number?

A
A mole is the mass of Avogadro’s number of particles of a substance.
B
A mole is the amount of a compound that has Avogadro’s number of carbon-12 atoms in it.
C
A mole contains Avogadro’s number of particles of a substance.
D
A mole is the amount of any substance that has the same mass as Avogadro’s number of carbon-12 atoms.
8

Which proportionality shows the result of combining Avogadro’s law with Boyle’s law?

A
mc029-1.jpg
Option A
B
mc029-2.jpg
Option B
C
mc029-3.jpg
Option C
D
mc029-4.jpg
Option D
9

The volume of a gas decreases to half of its original volume, but the gas maintains the same number of moles and temperature. According to the ideal gas law, what will most likely happen to the pressure?

A
It will double.
B
It will decrease.
C
It will increase slightly.
D
It will remain the same.
10

A scientist is examining a mixture of nitrogen, hydrogen, and ammonia. The individual pressures that are exerted by nitrogen and hydrogen are 0.26 atm and 0.28 atm, respectively. If the total pressure is 0.90 atm, what is the partial pressure of ammonia?Use .

Question illustration
A
0.27 atm
B
0.36 atm
C
0.54 atm
D
0.90 atm
11

What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?Use and .

Question illustration
A
0.83 L
B
3.33 L
C
5.60 L
D
20.8 L
12

The pictures below show samples of different substances.The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?

Question illustration
A
No, because they have different masses.
B
No, because they have different volumes.
C
Yes, if each sample contains 6.02 x 1023 atoms.
D
Yes, if each sample contains 2 amu.
13

Which quantity is held constant when working with Boyle’s, Charles’s, and Gay-Lussac’s laws?

A
volume
B
moles
C
pressure
D
temperature
14

Consider the substances below.• 1 mol of beryllium• 1 mol of salt• 1 mol of water• 1 mol of hydrogenWhich statement is true about these substances?

A
They have exactly the same mass.
B
They have different numbers of particles.
C
They have the same number of atoms.
D
They have different masses.
15

Which statement best explains the purpose of using a mole in the measurement of matter?

A
It is commonly used as another unit of mass.
B
It allows chemists to deal with a large number of atoms.
C
It is used only for studying the properties of gases.
D
It explains that substances with the same moles have the same mass.

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