Question

Calculate the number of moles in 100 x 10^25 water molecules.

Answer 1

Number of moles of water present in

1.5 x 10^25

= (1.5 x 10^25)÷ (6.022 x 10^23)

= 24.91 moles[ = 448.36 g of water]

Answer 2

Answer:

Given mass = 100 × 10²⁵ g

Molar mass of Water(H20) = 18 mol

Now, No. of. Moles = Given mass / Molar mass

Moles = 100 × 10²⁵/ 18

Moles = 5.55 × 10²⁵ g/mol

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