Sagot :
Answer:
A
Explanation:
RMM of ca(c2h302)2=158
%Ca= 40/158×100=25.3
%C=48/158×100=30.3
%H=6/158×100=3.7
%O=64/158×100=40.5
Answer:
a) 25.3% Ca, 30.4% C, 3.8% H, 40.5% O
Explanation:
Molar mass of Ca(C₂H₃O₂)₂ = 158.160 g/mol
percent composition:
Ca = (40 /158.160 ) × 100
Ca = 25.3%
C = (48 /158.160 ) × 100
C = 30.4%
H = (6 /158.160 ) × 100
H = 3.8%
O = (64 /158.160 ) × 100
O = 40.5%
40.5% + 3.8% + 30.4% + 25.3% = 100%
It means 1st option is correct.