Honor's Chemical & Physical Changes/Elements & Compounds/Mixtures Quiz
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Last updated 6 months ago
12 questions
Required
1 point
1
Question 1
1.
Which of the following is a compound?
Required
2 points
2
Question 2
2.
Consider the table below. In a sample of 100 g of sucrose, what would be the expected mass of hydrogen?
Required
2 points
2
Question 3
3.
Consider the table below. Why are the mass ratios of copper and chlorine not the same for Compound I and Compound II?
Required
3 points
3
Question 4
4.
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 points
4
Question 5
5.
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 points
5
Question 6
6.
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
Required
4 points
4
Question 7
7.
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)
Required
6 points
6
Question 8
8.
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 points
2
Question 9
9.
Which two are categorized as pure substances?
Required
2 points
2
Question 10
10.
What are examples of homogeneous mixtures?
Required
2 points
2
Question 11
11.
Which among the following are examples of heterogeneous mixtures?
Required
2 points
2
Question 12
12.
Identify the two compounds from the following substances.
