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WorksheetsLT16_Percent Mass Practice_Day Two
Total questions: 10
Worksheet time: 50mins
What is the percent mass of oxygen in N2O5?
25.94%
74.06%
32.6%
45.0%
18.6%
What is the percent mass of aluminum in Al2O3?
30.8%
66.9%
47.08%
52.9%
78.9%
What is the percent mass of water in CaCl2·5H2O?
44.8%
69.8%
20.3%
55.0%
37.7%
What is the percent mass of oxygen in Al(NO3)3?
71.0%
67.6%
86.8%
41.2%
35.0%
A compound has 2.5g of nitrogen, 5.6g of carbon, and 0.98g of hydrogen. What is the percent mass of nitrogen?
56.9%
43.2%
75.6%
27.5%
32.0%
A compound only has oxygen and fluorine. A 5.0g sample has 1.23g of fluorine. What’s the percent mass of oxygen?
15%
20%
75%
23%
59%
A compound contains 10g of carbon, 17g of chlorine, and 9g of phosphorus. What is the percent mass of carbon?
27.8%
35.3%
19.8%
49.8%
75.2%
What is the percent mass of water in CuCl2·5H2O?
32.8%
22.0%
40.1%
75.2%
28.2%
A 3.8g sample of a compound is found to have phosphorus and bromine. The mass of bromine is 1.7g; what is the % mass of phosphorus?
16.9%
45.5%
78.0%
55.3%
65.0%
A compound has carbon, nitrogen, and fluorine. The percent mass of carbon and nitrogen is 23.6% and 19.8% respectively. What is the percent mass of fluorine?
67.3%
58.1%
46.6%
39.8%
56.6%
