Well, the molar mass of acetone would be
3(12.011)+6(1.008)+15.999 , which cleans up to be 58.08 grams.
out of this total, 3(12.011), or 36.033 grams are carbon
So, to find the percent, you do part over whole
36.033/58.08, which equals 0.6204 with significant figures
multiply that by 100 to get 62.04%
Hope that helps!
Answer:
62.07% is the percent by mass of carbon in acetone.
Explanation:
Percentage of an element in a compound:
[tex]\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of compound}}\times 100[/tex]
Molar mass of acetone =58 g/mol
Number of carbon atom in acetone = 3
Atomic mass of carbon = 12 g/mol
Percentage of carbon in acetone:
[tex]\frac{3\times 12 g/mol}{58 g/mol}\times 100=62.07\%[/tex]
