Question

You have 15.42g of C2H6. How many moles of H2O can be made?

Answer 1

Answer: The moles of water produced are 1.54 moles.

Step-by-step explanation:

To calculate the number of moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}`

Given mass of ethane = 15.42 g

Molar mass of ethane = 30.07 g/mol

Putting values in above equation, we get:

`\text{Moles of ethane}=(15.42g)/(30.07g/mol)=0.513mol`

The chemical equation for the combustion of ethane follows:

`2C_2H_6+5O_2\rightarrow 4CO2+6H_2O`

By Stoichiometry of the reaction:

2 moles of ethane produces 6 moles of water

So, 0.513 moles of ethane will produce =
`(6)/(2)* 0.513=1.54mol` of water

Hence, the moles of water produced are 1.54 moles.