Essential Chemistry for IGCSE - Chemical Calculations (Section 2 - No. 26)

How many grams of oxygen are needed to react completely with 24g of carbon to form carbon dioxide (CO₂)? (C = 12, O = 16)

16 g

32 g

48 g

64 g

C + O₂ -> CO₂. 24g of Carbon is 2 moles. 2 moles of oxygen are required, which is 2 * 32 = 64 g