Question

If 40 grams of NaOH dissolve in 1000litre of water ,calculate the total number of mole ions present in the solution.class 9​

Answer 1

Answer:

The molar mass of NaOH is 40 g/mol.

The number of moles of NaOH is equal to the ratio of its mass to molar mass.

The number of moles of NaOH =

40g/mol

40g

=1mol

The molarity of NaOH solution is the ratio of number of moles of NaOH to total volume of solution in L.

M=

1L

1mol

=1M