Answer the following questions:
1. Carbon and oxygen combine in the ratio of \(3:8\) by mass to form carbon dioxide. What mass of oxygen gas would be required to react completely with \(21\) \(g\) of carbon?
Ratio of \(C\) : \(O\) by mass in carbon dioxide is:
\(C + O_2 \to CO_2\)
Carbon : Oxygen →
∴ = 21 : \(x\)
\(x\) =