Question

How many moles are present in 10.5 grams of NaCl?

Answer 1

Answer : The number of moles present in 10.5 grams of NaCl are, 0.179 moles.

Solution : Given,

Mass of NaCl = 10.5 g

Molar mass NaCl = 58.5 g/mole

Formula used :

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

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

`\text{Moles of NaCl}=(10.5g)/(58.5g/mole)=0.179moles`

Therefore, the number of moles present in 10.5 grams of NaCl are, 0.179 moles.