Free Printable Mole Races I

1.

0.450 g of Fe contains how many atoms?

a)

$4.85\ x\ 10^{21}$

b)

$6.02\ x\ 10^{23}$

c)

$0.450\ x\ 10^{23}$

d)

$450000$

2.

0.200 g of H₂O contains how many molecules?

a)

$6.62\times10^{22}$

b)

$6.64\times10^{22}$

c)

$6.66\times10^{22}$

d)

$6.68\times10^{22}$

e)

$6.70\times10^{22}$

3.

How many molecules of water are in 1.058 moles of H₂O?

a)

$6.02\times10^{23}$

b)

$6.37\times10^{23}$

c)

$6.73\times10^{23}$

d)

$7.02\times10^{23}$

4.

How many atoms are in 0.750 mole of Fe?

a)

$4.52\times10^{23}$

b)

$4.77\times10^{23}$

c)

$4.83\times10^{23}$

d)

$4.99\times10^{23}$

5.

How many molecules of H₂O are present in 1.058 g of water?

a)

$3.51\times10^{22}$

b)

$3.53\times10^{22}$

c)

$3.55\times10^{22}$

d)

$3.57\times10^{22}$

6.

How many atoms are in 0.750 g of Fe?

a)

$6.06\times10^{21}$

b)

$8.08\times10^{21}$

c)

$10.10\times10^{21}$

d)

$1.21\times10^{22}$

7.

Which contains more molecules: 10.0g of O₂ or 50.0g of I₂?

a)

10.0g of $O_2$

b)

50.0g of $I_2$

8.

A solution of ammonia and water contains 2.10 x 10²⁵ water molecules and 8.10 x 10²⁴ ammonia molecules. How many total hydrogen atoms are in this solution?

a)

$10.20\times10^{24}$ hydrogen atoms

b)

$6.63\times10^{25}$ hydrogen atoms

c)

$8.95\times10^{25}$ hydrogen atoms

d)

$1.02\times10^{26}$ hydrogen atoms

9.

How many O₂ molecules are present in 2.4 moles of CO₂?

a)

$1.44\times10^{24}$ molecules

b)

$2.17\times10^{24}$ molecules

c)

$2.89\times10^{24}$ molecules

d)

$4.33\times10^{24}$ molecules

10.

1.14 x 10²⁴ formula units of NaCl represents how many moles?

a)

1.47 moles

b)

1.61 moles

c)

1.75 moles

d)

1.89 moles

11.

Nitric acid has the chemical formula HNO₃. If there are 3.55 x 10²³ atoms of O in the sample, how many moles of nitric acid are there?

a)

0.0657 mole

b)

0.131 mole

c)

0.197 mole

d)

0.263 mole

12.

If you have 1.42 x 10²⁴ atoms of gold, how many moles are represented by this?

a)

0.590 mole

b)

1.18 moles

c)

1.77 moles

d)

2.36 moles

13.

The molar mass of NaCl is:

(a)

14.

The compound with a molar mass of 133.33g is:

a)

$MgCl_2$

b)

$AlCl_3$

c)

$TiBr_2$

d)

$CsI$

15.

How many moles are in 15.0g of lithium?

(a)

16.

How many grams are in 2.40 moles of sulfur?

(a)

17.

How many moles are in 22.0g of argon?

(a)

18.

What is the mass of 88.10 moles of magnesium?

(a)

19.

2.30g of phosphorus is equal to (a) mole.

20.

How many grams are in 11.90 moles of chromium?

(a)

21.

The molecule CH₂CHCH₃CH₂CHF(CH₃)₂CCH₃ contains ___ H atoms

a)

16

b)

18

c)

20

d)

22

22.

A representative particle of silicon dioxide is:

a)

a grain of sand

b)

an atom of silicon

c)

a molecule of $SiO_3$

d)

a molecule of $SiO_2$

23.

There are _____ chocolate chips in five dozen chocolate chips

a)

5

b)

30

c)

50

d)

60

24.

The representative particle for O₂ is the:

a)

atom

b)

molecule

c)

formula unit

d)

mole

25.

Molar mass is defined as the mass of:

a)

one mole of a solution

b)

one mole of representative particles of a substance

c)

$6.02\times10^{20}$ particles

d)

one Avogadro’s number of atoms

Mole Races I

Total questions: 25

Worksheet time: 29mins

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