Question

Calculate the number of molecules in 2.5 moles of water.

Answer 1

We known that, one mole of each substance contains $6.023\times {10}^{23}$molecules.

So, 2.5 moles of water will contain $2.5\times 6.023\times {10}^{23}$molecules.

Hence, number of molecules is $15.06\times {10}^{23}$molecules.