Question

calculate the no.of moles present in 60g NaOH?

Answer 1

hi here is your answer ,

we know ,molar mass of NaOH is 40ie 40g
NaOh=1 mole
so,the number of moles of 60 g
NaOh =1/40*60=1.5moles

Answer 2

Number of moles is 1.5 moles.

Given:

Mass of NaOH = 60 gm

Solution:

We also know that the molar mass of NaOH = 40 gm

This means that 40 gm of NaOH = 1 mole

This is because 1 mole of any substance is equal to the mass of the atoms contained in it.  

So if 40 gm NaOH = 1 mole

60 gm NaOH $=\left(\frac{1}{40}\right) \times 60 = 1.5 \ moles$

Or we can also use the formula:

Number of moles $= \frac{\text{Given Mass of the substance}}{\text{Molecular Mass of the substance}}$

$= \frac{60}{40}$

Number of moles = 1.5 moles