Calculate the mass percent composition of carbon in c3h10n4o4. enter your answer as a number to 1 decimal place.

Explanation:

I'm using approximate molecular masses.

3 * C = 3 * 12 = 36

10*H = 10* 1 =   10

4*N = 4  *14 =   56

4*O = 4 * 16 =   64

Total            = 166

Molecular Mass = 166

% Carbon = 36/166 * 100 = 21.7

Carbon = 21.7%

My atomic masses are approximate because all periodic tables are different. Re do the problem using the numbers off your periodic table.

the atomic mass is the bottom number on the element.

-steel jelly

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons