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CP Chem Chemical & Physical Changes/Elements & Compounds/Mixtures Quiz (9/25/2024)

Last updated 8 months ago

10 questions

Required

2

Required

2

Required

3

Required

5

Required

4

Required

6

Required

2

Required

2

Required

2

Required

2

Question 1

1.

Consider the table below. In a sample of 100 g of sucrose, what would be the expected mass of hydrogen?

42.20 grams

 100.00 grams

51.26 grams

6.50 grams

Question 2

2.

Consider the table below. Why are the mass ratios of copper and chlorine not the same for Compound I and Compound II?

there is another element not shown

the copper changes to chlorine in compound II

the two compounds are not the same 

experimental error

Question 3

3.

When mercury(II) oxide is heated, it decomposes into mercury and oxygen. If a 28.4 g sample of mercury(II) oxide decomposes producing 2.0 g of oxygen, what is the percent by mass of mercury in the sample?

Question 4

4.

Sort the following words- Which represent physical changes and which represent chemical changes?

Other Answer Choices:

vaporize

crush

ferment

corrode

burn

boil

explode

tarnish

freeze

condense

Question 5

5.

Other Answer Choices:

Oil and water

Coffee (various dissolved compounds in water)

Brass (a solid mixture of copper and zinc)

soil

Rubbing alcohol (isopropyl alcohol dissolved in water)

chocolate chip cookie

salad

Vinegar (acetic acid dissolved in water)

Question 6

6.

A 2 gram sample of sucrose is 6.50% hydrogen. What is the mass percentage of hydrogen in 300 g of sucrose? Explain your reasoning.

Question 7

7.

Which two are categorized as pure substances?

Iron

Granite

Sea water

Diamond

Question 8

8.

What are examples of homogeneous mixtures?

Sand and water

Fruit salad

Air

Salt dissolved in water

Question 9

9.

Which among the following are examples of heterogeneous mixtures?

Beef stew

Concrete

Vinegar

Sugar solution

Question 10

10.

Identify the two compounds from the following substances.

Carbon dioxide

Silver

Iron

Water