Free Printable The Mole Test review

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The Mole Test review

Total questions: 23

Worksheet time: 3hrs 33mins

Name

Class

Date

The empirical formula for a compound that contains 36 g C, 8.0 g O, and 6.0 g H is

C₄H₆O

C₆H₁₂O

C₉H₂O₄

C₆H₁₂O₆

What is the molar mass of AuCl₃?

96 g

130 g

232.5 g

303.3 g

How many molecules are in 2.5 mol of NaCl?

1.51x10²³

146

4.15

1.51x10²⁴

How many atoms of carbon are in 6.00g of carbon?

1.20x10²⁴atoms C

6.02x10²³atoms C

3.01x10²³atoms C

1.50x10²³atoms C

You have 3.5 L of H₂ (g) at STP. How many moles of gas are there?

22.4 mol

22.4 L

0.16 mol

0.16 L

36.0 g of Be contains how many moles?

0.25 mol

4.0 mol

45 mol

320 mol

Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO₂?"

1 mol = 22.4 L

1 mol = 44.01 g

1 mol = 6.02x10²³ atoms

more than one

How many grams is 1.2 moles of Neon?

0.05 grams

16.6 grams

21.2 grams

24 grams

What is the percent by mass of oxygen in MgO?

20%

40%

50%

60%

10.

What is the percent composition of Benzene, C₆H₆?

C = 50%
H = 50%

C = 85.7 %
H = 14.3%

C = 92.2%
H = 7.8%

C = 71.9%
H = 28.1%

11.

A formula with the lowest whole # ratio of elements in a compound is called

Molecular Formula

Chemical Formula

Empirical Formula

Distance Formula

12.

What are the units in molar mass?

grams

moles

moles/gram

grams/mole

13.

The molar mass of an element is equal to its...

Atomic mass

Atomic number

Oxidation number

Valence electrons

14.

What is the mass percentage of Carbon in Carbon dioxide (CO₂)?

27.27%

42.86%

72.73%

72.72%

15.

Which list of number of atoms in Mg(NO₃)₂ is right?

Mg : 1--NO : 6

Mg : 1-- N : 6--O: 6

Mg : 1-- N: 1-- O: 5

Mg : 1-- N: 2-- O: 6

16.

A 154 g sample of a compound contains 15.01 g of C and 62.03 g of Cl. What is the empirical formula for this compound.

CCl₃

C₄Cl

CCl₄

CCl

17.

What is the empirical formula if you have 88.80% copper and 11.20% oxygen?

Cu₃C₈

Cu₂O

CuO₄

Cu₄O₁₀

18.

What is the best definition for subscript?

The big number that tells you the number of molecules.

The atomic number

The little number that tells the number of atoms for each element.

19.

How many Carbons "C" are in C₁₈H₃₄O₃

20.

The number 6.02 x 10²³ is called...

Obama's number

Bohr's number

Trump's number

Avogadro's number

21.

The quantity, 22.4 L, is called the ........................ of a gas.

molar volume

molar mass

Atomic volume

22.

Standard temperature and pressure (STP) mean

A temperature of 0°C and a pressure of 101.3 kPa, or 1 atmosphere (atm).

A temperature of 100°C and a pressure of 101.3 kPa, or 1 atmosphere (atm).

A temperature of 0°K and a pressure of 10 atmosphere (atm).

23.

Check the elements that are diatomic:

Helium

Hydrogen

Chlorine

Bromine

Boron

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The Mole Test review

Total questions: 23

Worksheet time: 3hrs 33mins

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