Question

plz help due friday and will give star or thanks
List the % by mass for each element:
First, add the total mass of 4 atoms of hydrogen, plus 2 atoms of carbon, plus 2 atoms of oxygen. Total mass = ___________________. To obtain percent by mass, divide the mass of each element by the mass of the total:

H=
C=
O=

Answer 1

Explanation:

total mass = 4×H+2×C+2×O

= 4×1+2×12+2×16

= 70

H%= 4 × 100

70

=5.71%

C%= 24 ×100

70

=34.28%

O%= 32 ×100

70

=45.71%