Question

In a compound, carbon and oxygen react in a ratio 3:8 by mass to form carbon dioxide. What mass of oxygen is required to react completely with 9 g carbon?
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Answer 1

Answer:

For 3 g of carbon, 8 g of oxygen is needed.

For 1 g of carbon,

8 3 83 g of oxygen is needed.

For 9 g of Carbon,

8 3 83 g × 9 g = 24 g of oxygen is needed