What is the % (by mass) of carbon in calcium oxalate?
a. 9.4
b. 18.8
c. 31.25
d. 34.4
2007-05-12 15:40:15 · 6 answers · asked by P 1 in Science & Mathematics ➔ Chemistry
mass of carbon in compound=2*12=24g so therfore % by mass=24\128*100=18.8%
2007-05-12 15:44:45 · answer #1 · answered by Dr. Eddie 6 · 0⤊ 0⤋
There are two carbons in this compound, and carbon has a molar mass of 12. The molar mass of carbon in calcium oxalate is therefore 2*12 = 24, and the percentage by mass is 24/128 = 0.1875, which is 18.75%. Answer B), 18.8%
2007-05-12 15:42:55 · answer #2 · answered by DavidK93 7 · 0⤊ 0⤋
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2016-10-15 12:32:55 · answer #3 · answered by Anonymous · 0⤊ 0⤋
18.75 answer
c=12*2=24
% of c =24/128*100
=18.75
2007-05-12 15:52:16 · answer #4 · answered by rana h 2 · 0⤊ 0⤋
B. 18.8%
Ca +2C +2O2==> CaC2O4
2(12.0)=24.0g
24.0g/128g x 100%=18.8%
2007-05-12 15:54:02 · answer #5 · answered by Anonymous · 0⤊ 0⤋
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2007-05-12 15:43:53 · answer #6 · answered by Anonymous · 0⤊ 1⤋