Question

Hey!!! Chemistry Question about MOLES... Please help...

When ethane (C2H6) burns, it produces carbon dioxide and water:

2C₂ H₆ (g) + 7O₂ (g) → 4CO₂ (g) + 6H₂ O (1)

How many moles of water will be produced when 16 moles of ethane are burned?

Answer 1

48 moles of water

Step-by-step explanation:

2C2H6 + 7O2 --> 4CO2 + 6H2O

We want to find the number of moles of water produced if 16 moles of ethane (C2H6) are burned.

We can use dimensional analysis to find the answer.

Needed conversions: We need the mole ratio of ethane to water in the chemical equation which would be 2 to 6. So for every 2 moles of ethane that are burned 6 moles of water is produced.

Using this ratio we can create a table:

`\frac{16mol(C_2H_6)}{} *(6mol(H_2O))/(2mol(C_2H_6))`

the mol (C2H6) cancel out and we get

`\frac{16}{} *(6)/(2mol(C_2H_6))`

we then multiply

16 * 6/2molC2H6 = 48molH2O

So if 16 moles of ethane is burned 48 moles of water is produced