Question

Calculate the number of moles in(a) 9g of H2O​

Answer 1

HEYA GM ❤

★ MOLES = WEIGHT / MOLECULAR MASS

= 9g / 18 [ Mass of Water ]

= 0.5 Moles of H2O .

TQ ❤ ❤

Answer 2

Given :

Mass of H₂O = 9 gm of H₂O

To Find :

Number of moles of H₂O

Solution :

Mole is defined as the number of particles which is exactly equal to the number of ¹²C-atoms present in 0.012 Kg of carbon.

We are required to find the number of moles present in 9 gm of H₂O.

18 gm of H₂O = 1 mole

9 gm of H₂O = $\frac{1}{18}$ × 9

                     = 0.5 mole

Therefore, the number of moles in 9 gm of H₂O is 0.5.