Question

The combustion of ethane (C2H6) produces carbon dioxide and steam:
2C2H6(g)+70(g)—>4CO2(g) +6H2O(l)
How many moles of CO2 are produced when 5.70 mol of ethane are burned in an excess of oxygen?2

Answer 1

Answer on Question #40373 - Chemistry - Other

Question

The combustion of ethane $(C_2H_6)$ produces carbon dioxide and steam:

$$2C_2H_6(g) + 7O_2(g) \rightarrow 4CO_2(g) + 6H_2O(l)$$

How many moles of $CO_2$ are produced when 5.70 mol of ethane are burned in an excess of oxygen?

Answer:

According to the reaction:

- 2 mol of $C_2H_6$ produce 4 mol of $CO_2$

- 5.70 mol of $C_2H_6$ – $x$ moles of $CO_2$

So, number of moles of $CO_2$ produced by combustion of 5.70 mol of ethane equals:

$$x = \frac{5.70 \cdot 4}{2} = 11.4 \text{ mol}$$

Answer: $n(CO_2) = 11.4$ mol.