Compound I is 64.2% copper and 35.80% chlorine. What is the mass ratio of copper to chlorine?
A) 1.79 : 1
B) 1.43 : 1
C) 1.79 : 0.56
D) 1.43 : 0.63
Compound II is 47.27% copper and 52.73% chlorine. What is the mass ratio of copper to chlorine?
A) 0.90 : 1
B) 1.11 : 1
C) 1.11 : 0.90
D) 0.90 : 1.11