Free Printable Chemistry Moles

Worksheets

Chemistry Moles

Total questions: 25

Worksheet time: 2hrs 32mins

Name

Class

Date

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

1 mole = 78.12 g

1 mole = 22.4 L

1 mol = 6.02x 10²³ particles

more than one

Which expression below show the correct method of determining the percent composition of Sodium in Na₂CO₃?

%Na = (22.99g/106g) x 100

%Na = (22.99g/106) / 100

%Na = (45.98g/106g) x 100

%Na = (106/45.98g) x 100

What is the molar mass of Hydrogen Peroxide (H₂O₂)?

48 g/mole

34.02 g/mole

36.5 g/mole

35.5 g/mole

What are the units for molar mass?

meters

amu

grams/mole

liters

The number 6.02 x 10²³, which is the number of particles found in a mole.

molar mass

mole

Avogadro's number

hydrate

How many moles are in 16.94g of water?

16.94 mol H₂O

0.9401 mol H₂O

305.3 mol H₂O

1.063 mol H₂O

How many molecules are in 9.44 moles of AlCl₃?

5.68 molec AlCl₃

5.68x10²⁴molec AlCl₃

0.705 molec AlCl₃

1.25x10²³molec AlCl₃

How many grams are in 3.3 mol of Potassium Sulfide (K₂S)?

360 g

450 g

240 g

130 g

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

24 molecules

180 molecules

180 g

6.02 x 10²³molecules

10.

Which of the following would have the highest molar mass?

CO₂

H₂O

NaCl

AgCl

11.

Find the percent composition of hydrogen in (NH₄)₂S.

11.8%

41.1%

47.1%

12.

Which of the following dimensional analysis setups will correctly convert 2.50 moles of sodium to grams of sodium?

13.

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

1.20x10²⁴atoms C

6.02x10²³atoms C

3.01x10²³atoms C

1.50x10²³atoms C

14.

How many grams are in 1.2 x 10²⁴ molecules of CO?

28 grams

56 grams

6.02 grams

1.2 grams

15.

What is the mass of 0.89 mol of CaCl₂?

111 grams

0.008 grams

98.7 grams

none of the choices

16.

How many atoms are in a 3.56 g sample of Cu?

3.37 x 10²² Cu atoms

6.02 x 10²³ Cu atoms

0.056 Cu atoms

1 Cu atom

17.

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

18.

How many water molecules are in 5.2 moles of water?

6.02 x 10²³

5.2

3.1 x 10²⁴

8.638 x 10^-24

19.

Na₂CO₃ · 10H₂O is known as sodium carbonate ______

Hydroxide

Hydrate

Decahydrate

None of the above

20.

Find the percentage composition of Mg in Mg₃(PO₄)₂.

27.75% Mg

23.57% Mg

48.68% Mg

13.45% Mg

21.

Determine the molar mass for CCl₄

153.8 g/mol

47.54 g/mol

189.35 g/mol

82.9 g/mol

22.

What is the molar mass of AuCl₃?

96 g

130 g

232.5 g

303.3 g

23.

A sample of an unknown hydrocarbon is composed of 12.16 g carbon, 2.027 g hydrogen, and 10.81 g oxygen. If its molar mass is 148.18 g/mol, what is the molecular formula for this compound?

C₄H₁₀O

C₆H₁₂O₄

C₇H₁₆O₃

C₅H₈O₅

24.

What is the empirical formula of a compound that has 10.52 g Ni, 4.38 g C, and 5.10 g N?

Ni₂CN

NiC₂N

NiC₂N₂

NiCN

25.

How many water molecules are attached to each formula unit of magnesium carbonate pentahydrate?

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Chemistry Moles

Total questions: 25

Worksheet time: 2hrs 32mins

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