Question 1(1 point)

The molar mass of water is 17.02 g/mol.

Question 1 options:

True

False

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Question 2(1 point)

A mole of molecular hydrogen (H2) has 6.022 1023atoms of hydrogen.

Question 2 options:

True

False

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Question 3(1 point)

How many moles of NaCl are present in 20.0 g of NaCl?

Question 3 options:

58.4

1.01

29.2

0.342

0. 0143

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Question 4(1 point)

Codeine (C18H21NO3) is a painkiller. What is the molar mass of codeine?

Question 4 options:

195.60

299.37

227.30

211.43

313.35

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Question 5(1 point)

What is the molar mass of MgCO3?

Question 5 options:

56.928 g/mol

71.173 g/mol

85.755 g/mol

84.313 g/mol

36.312 g/mol

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Question 6(1 point)

How many moles of HNO3are present in 450 g of HNO3?

Question 6 options:

32 moles

8.4 moles

7.1 moles

14 moles

17 moles

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Question 7(1 point)

How many moles of water are there in a sample that has a mass of 2.786 g?

Your Answer:

Question 7 options:

Answer

units

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Question 8(2 points)

How many moles of carbon are produced when 1745 g of glucose decomposes according to the following equation?

C6H12O66C + 6H2O

Question 8 options:

6.026

72.12

58.12

365.8

1081

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Question 9(2 points)

In the reaction Na2CO3+ 2HCl2NaCl + CO2+ H2O, how many grams of CO2are produced when 7.5 moles of HCl is fully reacted?

Question 9 options:

170 g

83 g

88 g

66 g

44 g

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Question 10(2 points)

Consider the reaction: Na2CO3+ 2HCl 2NaCl + CO2+ H2O. A minimum of _____ moles of sodium carbonate is needed to fully react with 750 g of HCl.

Question 10 options:

110

53

21

10

5.2

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Question 11(2 points)

The following reaction describes the decomposition of glucose with sulfuric acid:C6H12O66C + 6H2O. How many grams of carbon are produced when 22.6 grams of glucose is reacted?

Question 11 options:

6.08 g

9.04 g

12.0 g

72.1 g

84.3 g