Question

Given x g of a substance that has a molar mass of y g/mol, which operation will give an answer with units of moles?

Answer 1

To calculate moles of any
`\text{x grams}` of a subtance, we need to divide the given mass by the molar mass of the substance that is
`\text{y grams/mol}` given as per the question. By simply putting the values of the two masses we will be left with the number of moles of the given substance.

`n=(m)/(M)`

where, n= number of moles of given substance (mol)

m= given mass of the substance (grams)

M= molar mass of the given substance (grams/mol)