Unit Test — Unit test Answers

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Thirty grams of lead oxide and fifteen grams of ammonia react completely to produce solid lead, nitrogen gas, and liquid water. What will be approximate mass of all three products?

A
10 g
B
15 g
C
45 g
D
450 g
22
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Which would increase the rate of dissolving salt into water?

A
low temperature
B
little to no agitation
C
more surface area
D
darker colors
23

When dissolved in water, an acid or a base breaks down into

A
a proton and an electron.
B
two negative ions.
C
a positive and a negative ion.
D
a positive ion and a proton.
24

Which acid is naturally found in foods and can be safe to eat?

A
sulfuric acid
B
citric acid
C
hydrochloric acid
D
nitric acid
25

Which lists mixtures, in order, from the smallest particles to the largest particles?

A
solution, colloid, suspension
B
solution, suspension, colloid
C
suspension, colloid, solution
D
suspension, solution, colloid

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