Quiz about Mole Calculation

Question 1

How many molecules are in 6 mole of H₂SO₄?

Accepted Answer

3.61x10²⁴

Answer

6.02x10²³

Answer

6.02x10¹³⁸

Answer

5.90x10²⁵

Question 2

How many grams of water (H $$_2$$ O) are in 2 moles?

Accepted Answer

36 g

Answer

18 g

Answer

72 g

Answer

144 g

Question 3

If you have 3 moles of sodium chloride (NaCl), how many formula units do you have?

Accepted Answer

$$1.81 imes 10^{24}$$ units

Answer

$$6.02 imes 10^{23}$$ units

Answer

$$18.06 imes 10^{23}$$ units

Answer

$$9.03 imes 10^{23}$$ units

Question 4

How many atoms are in 2 moles of helium (He)?

Accepted Answer

$$12.04 imes 10^{23}$$ atoms

Answer

$$6.02 imes 10^{23}$$ atoms

Answer

$$3.01 imes 10^{23}$$ atoms

Answer

$$24.08 imes 10^{23}$$ atoms

Question 5

How many molecules are in 1 mole of chlorine (Cl₂)?

Accepted Answer

6.02x10²³

Answer

6.02x10²⁴

Answer

4.21x10²⁵

Answer

4.21x10²³

Question 6

A compound has a mass of 109.5g and 3 moles and a relative formula mass of 36.5. What is the compound?

Accepted Answer

HCl

Answer

Cl

Answer

SH4

Answer

AlCl3

Question 7

How many molecules are there in 31.8 moles of water? (H₂O has a molar mass of 18.0 g/mol)

Accepted Answer

1.91 x 10²⁵ molecules

Answer

572 g

Answer

5.28x 10-²⁵molecules

Answer

1.77 g

Question 8

Which of the following would have the highest number of moles?

Accepted Answer

15g H2O

Answer

4g CO2

Answer

22g NaCl

Answer

100g AgCl

Question 9

Vitamin C, also known as ascorbic acid, is water soluble and cannot be produced by the human body. Each day, a person's diet should include a source of Vitamin C, such as orange juice. Ascorbic acid has a molecular formula of C₆H₈O₆ and a molar mass of 176 grams per mole. Determine the number of moles of vitamin C in an orange that contains 0.171 grams of vitamin C.

Accepted Answer

.000971 moles

Answer

30.1 moles

Answer

1030 moles

Answer

.0001 mole

Question 10

Calculate the number of moles of chlorine atoms in 55g of copper (II) chloride.

Accepted Answer

0.82 moles

Answer

0.41 moles

Answer

1.6 moles

Answer

.20 moles

Question 11

Which has more molecules?

Accepted Answer

There are all the same

Answer

mole H2O

Answer

mole Al(OH)₃

Answer

mole NaCl

Question 12

How many molecules are present in 135 g of Teflon C₂F₄

Accepted Answer

8.13 x 10 ²³ molecules

Answer

6.13 x 10²³ molecules

Answer

5.13 x 10²³ molecules

Answer

9.13 x 10²³ molecules

Question 13

How many moles are in 88 grams of carbon dioxide (CO_2)?

Accepted Answer

1 mole

Answer

2 moles

Answer

0.5 moles

Answer

4 moles

Question 14

A sample contains 0.25 moles of sodium chloride (NaCl). How many grams does this sample weigh? (Molar mass of NaCl = 58.44 g/mol)

Accepted Answer

14.61 g

Answer

29.22 g

Answer

58.44 g

Answer

116.88 g

Question 15

If you have 3 moles of water (H_2O), how many grams of water do you have?

Accepted Answer

36 g

Answer

54 g

Answer

18 g

Answer

90 g

Question 16

Calculate the number of moles in 200 grams of calcium carbonate (CaCO_3). (Molar mass of CaCO_3 = 100 g/mol)

Accepted Answer

2 moles

Answer

1 mole

Answer

0.5 moles

Answer

4 moles

Question 17

How many molecules are in 2 moles of oxygen gas (O_2)?

Accepted Answer

$$1.204 imes 10^{24}$$ molecules

Answer

$$6.02 imes 10^{23}$$ molecules

Answer

$$3.01 imes 10^{23}$$ molecules

Answer

$$2.408 imes 10^{24}$$ molecules

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