Mass Percentage
Authored by Charles Martinez
Chemistry
7th - 9th Grade
NGSS covered
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Choose the formula for calculating percentage composition
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Cane sugar is a white, odorless, crystalline powder with a sweet taste and the formula C12H22O11. what is the percentage composition of hydrogen in cane sugar?
6.43%
51.5%
72.4%
4.23%
3.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
What is the percent of phosphorus by mass in phosphoric acid, H3PO4? (Your answer should be rounded to three significant figures. Don't include units. E.g. 12.3)
Tags
NGSS.HS-PS1-7
4.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
What is the percent by mass of calcium in calcium carbonate, CaCO3? (Your answer should be rounded to three significant figures. Don't include units. E.g. 12.3)
Tags
NGSS.HS-PS1-7
5.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
What is the percent by mass of oxygen in magnesium oxide, MgO? (Your answer should be rounded to three significant figures. Don't include units. E.g. 12.3)
Tags
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the percent by mass of hydrogen in HNO3?
22.2
1.59
25.4
76.2
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the percent composition by mass of sulfur in Na2SO4?
22.5%
32.4%
50%
18.5%
Tags
NGSS.HS-PS1-7
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