WorksheetsPercent Composition
Total questions: 15
Worksheet time: 3hrs 30mins
What is the percent composition by mass of oxygen in the compound MgSO4 (total compound mass = 120 g/mol)?
What is the percent composition by mass of magnesium in the compound MgSO4 (total compound mass = 120 g/mol)?
What is the percent composition by mass of sulfur in the compound MgSO4 (total compound mass = 120 g/mol)?
What is the percent by mass of calcium in CaF2 (total compound mass = 78 g/mol)?
What is the percent by mass of fluorine in CaF2 (total compound mass = 78 g/mol)?
Which element has an abundance of 39.03% in the compound sodium phosphate, Na3PO4
Na
P
O
None of the above
Which element in the compound potassium cyanide, KCN, has a percent composition of 60.97%?
K
C
N
None of the above
H = 50%
H = 14.3%
H = 7.8%
H = 28.1%
Carbon monoxide, a deadly gas, has a chemical formula of CO (one carbon atom with one oxygen atom). If you look at the total atomic mass of CO, does carbon or oxygen make up more of the mass?
carbon
oxygen
they are exactly the same
it is impossible to tell
