CH-2027
Empirical and molecular formulae
Chemistry · Secondary 4 · Medium · Empirical and molecular formulae
A sample of cobalt sulfide contains 70% cobalt and 30% sulfur by mass. What is the empirical formula of cobalt sulfide? (Ar: Co = 59, S = 32)
- CoS
- Co2S3
- Co5S4
- Co4S5
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