Question

What is the number of moles of potassium chloride present in 148 g of kcl?

Answer 1

Answer : The number of moles of potassium chloride is, 1.99 moles.

Explanation : Given,

Mass of KCl = 148 g

Molar mass of KCl = 74.5 g/mol

Formula used :

`\text{Moles of }KCl=\frac{\text{Mass of }KCl}{\text{Molar mass of }KCl}`

Now put all the given values in this formula, we get the moles of KCl.

`\text{Moles of }KCl=(148g)/(74.5g/mol)=1.99mole`

Therefore, the number of moles of potassium chloride is, 1.99 moles.

Answer 2

The number of moles of one substance given the amount in mass can be calculated by the use of the molar mass. This is the mass of a compound per 1 mol of the said substance. For, KCl the molar mass is 74.55 g/ mol

148 g / 74.55 g/mol = 2 mol KCl

Hope this answers the question. have a nice day.