Honor's Chemical & Physical Changes/Elements & Compounds/Mixtures Quiz

Last updated 11 months ago

12 questions

Required

1

Required

2

Required

2

Required

3

Required

4

Required

5

Required

4

Required

6

Required

2

Required

2

Required

2

Required

2

Library

Honor's Chemical & Physical Changes/Elements & Compounds/Mixtures Quiz

Last updated 11 months ago

12 questions

Required

1

Required

2

Required

2

Required

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?

Required

4

a) Which law would you use to compare CO and CO2 ? Explain. b) Without doing any calculations, which of the two has the highest percent by mass of oxygen? Explain.

Required

5

Other Answer Choices:

burn

ferment

freeze

crush

condense

boil

corrode

explode

tarnish

vaporize

Required

4

Other Answer Choices:

chocolate chip cookie

salad

soil

Oil and water

Required

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.

Required

2

Required

2

Required

2

Required

2

Which of the following is a compound?

crude oil

water

neon

mud

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

6.50 grams

51.26 grams

42.20 grams

 100.00 grams

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

experimental error

the copper changes to chlorine in compound II

the two compounds are not the same 

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?

a) Which law would you use to compare CO and CO2 ? Explain. b) Without doing any calculations, which of the two has the highest percent by mass of oxygen? Explain.

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

Other Answer Choices:

burn

ferment

freeze

crush

condense

boil

corrode

explode

tarnish

vaporize

Other Answer Choices:

Brass (a solid mixture of copper and zinc)

Rubbing alcohol (isopropyl alcohol dissolved in water)

chocolate chip cookie

salad

soil

Coffee (various dissolved compounds in water)

Oil and water

Vinegar (acetic acid dissolved in water)

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.

Which two are categorized as pure substances?

Sea water

Diamond

Granite

Iron

What are examples of homogeneous mixtures?

Fruit salad

Sand and water

Air

Milk

Which among the following are examples of heterogeneous mixtures?

Beef stew

Concrete

Sugar solution

Vinegar

Identify the two compounds from the following substances.

Carbon dioxide

Iron

Silver

Water

Which of the following is a compound?

crude oil

water

neon

mud

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

6.50 grams

51.26 grams

42.20 grams

 100.00 grams

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

experimental error

the copper changes to chlorine in compound II

the two compounds are not the same 

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

Brass (a solid mixture of copper and zinc)

Rubbing alcohol (isopropyl alcohol dissolved in water)

Coffee (various dissolved compounds in water)

Vinegar (acetic acid dissolved in water)

Which two are categorized as pure substances?

Sea water

Diamond

Granite

Iron

What are examples of homogeneous mixtures?

Fruit salad

Sand and water

Air

Milk

Which among the following are examples of heterogeneous mixtures?

Beef stew

Concrete

Sugar solution

Vinegar

Identify the two compounds from the following substances.

Carbon dioxide

Iron

Silver

Water