Question

What is the mass percent of oxygen in sodium bicarbonate (NaHCO3)?

19.04%



27.37%



38.09%



57.13%

Answer 1

Na- 11=22

H-1 =1

C-12=12

O3=16*3 =48

total = 22+1+12+48 = 83

83-----> 48

100-----> 100*48/83=57.83 = 57.13 is nearest answer