Question

♡ Calculate the percentage by weight:
a) e in carbon dioxide
b) Na in sodium carbonate
c) All in aluminium nitride
[(=12,0=16, H = 1, Na = 23, Al=a7, 0214]​

Answer 1

Explanation:

B) Mass percent of Na=Na/Total compound ×100

=23/83 ×100 =27.7%

C)Mass of percent of Al=26/40 × 100

=65%

Mass percent of N=14/40 × 100

=35%