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Biblioteka

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

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Posljednje ažuriranje about 1 year ago
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Pitanje 1
1.

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

Pitanje 2
2.

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

Pitanje 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?

Pitanje 4
4.

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

Drugi mogući odgovor:
vaporize
crush
ferment
corrode
burn
boil
explode
tarnish
freeze
condense
Pitanje 5
5.
Drugi mogući odgovor:
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)

Pitanje 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.

Pitanje 7
7.

Which two are categorized as pure substances?

Pitanje 8
8.

What are examples of homogeneous mixtures?

Pitanje 9
9.

Which among the following are examples of heterogeneous mixtures?

Pitanje 10
10.

Identify the two compounds from the following substances.