What is the percent by mass of hydrogen in aspirin C2H8O4?
molar mass aspirin = ? 2*12 + 8*1 + 4*16 = ?
% H = (mass H/total mass)*100 = ?
6.25 percent is my answer
Thanks a lot for helping me
I don't get 6.25.
molar mass C2H8O4 = about 96 but you can look it up more accurately if you wish.
Then mass H is 8 (again you can be more accurate if you wish)
Then (8/96)*100 = about 8.3%.
Please note. I looked up the formula for aspirin and I didn't get what you posted. The formula for aspirin is C9H8O4 with a molar mass of about 180.16
Then (8/180)*100 = 4.5% but that's an estimate.
To find the percent by mass of hydrogen in aspirin (C2H8O4), we need to calculate the mass of hydrogen and then divide it by the molar mass of aspirin multiplied by 100%.
Step 1: Calculate the molar mass of aspirin (C2H8O4)
The molar mass of carbon (C) is approximately 12.01 g/mol, hydrogen (H) is approximately 1.01 g/mol, and oxygen (O) is approximately 16.00 g/mol.
So, the molar mass of aspirin (C2H8O4) is:
2(12.01) + 8(1.01) + 4(16.00) = 34.08 g/mol
Step 2: Calculate the mass of hydrogen in 1 mole of aspirin
Since there are 8 hydrogen atoms in 1 molecule of aspirin, the mass of hydrogen in 1 mole of aspirin is:
8(1.01) = 8.08 g/mol
Step 3: Calculate the percent by mass of hydrogen in aspirin
Divide the mass of hydrogen by the molar mass of aspirin, and then multiply by 100%:
(8.08 g/mol / 34.08 g/mol) x 100% = 23.72%
Therefore, the percent by mass of hydrogen in aspirin is approximately 23.72%.