Question

CALCULATE WHETHER Ca(NO3)2 or K2CO3 HAS MORE OXYGEN BY % MASS

Answer 1

ANSWER:

Ca(NO3)2

Ca= 40

N ×2 = 14×2 = 28

O× 6 = 16 ×6= 96

so total = 40+28+96= 164

percentage of oxygen is 96/164 = 58.8%

K2CO3

K ×2 = 39×2= 78

C= 12

O ×3= 16×3= 48

so total = 78+12+48 = 138

percentage of oxygen is (48/138)×100 = 34.7%

so percentage of oxygen is higher in CA(NO3)2.

HOPE IT HELPED.