Question

Given the following equation: 2C6H6 + 15O2 → 12CO2 + 6H2O How many moles of O2 are needed to react with 4.0 moles of C6H6?

Answer 1

Answer:

4

Explanation:

Answer 2

30 moles of oxygen is required to react with 4 moles of benzene.

Finding out the moles of Oxygen

Given equation is

$2C_6H_6 + 15O_2--- > 12CO_2 + 6H_2O$

• We can see that 2 moles of benzene reacts with 15 moles of oxygen to form carbon dioxide and water.
• In the same way to find the moles of oxygen to react with 4 moles of benzene as,

$\frac{15\times4}{2} = x moles of O_2\\ = 30 moles of O_2$

• So 30 moles of oxygen is needed to react with 4 moles of benzene.