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1. Which sample contains the fewest atoms?

a. 10 g of C

b. 10 g of Ne

c. 10 g of H

d. 10 g of O

ANSWER: b

2. Which of the following is not an ionic compound?

a. CaSO4

b. MgO

c. CH4

d. LiF

ANSWER: c

3. The Roman numerals in the reaction given represent the coefficients in the balanced chemical

equation. What are the values of the coefficients?

I Ni(ClO4)2 + II K2S III KClO4 + IV NiS

I II III IV

a. 2 1 1 2

b. 1 2 1 1

c. 1 1 2 1

d. 1 1 1 2

ANSWER: c

4. In the reaction given below, how many grams of C14H9Cl5 will be produced by the reaction of

25.0 g of each of the starting materials?

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