Question

Q8) Calculate the no. of molecules in a drop of water weighing 0.05 g.

Answer 1

HEYA......


Molecular mass of water = 18 g.

No. of moles in 0.05 g of water = 0.05/18

.= 2.78 x 10-3 mol.

= 1.67 x 1021 molecules.

TYSM...#

Answer 2

Hey mate!

Here's your answer!!

Molecular mass of water = 18 g

No. of moles in 0.05 g of water = 0.05/18

= 2.78 x 10^-3 mol

One mole = 6.023 x 10^23 molecules

Therefore, 2.78 x 10^-3 mol of water contain
= 2.78 x 10^-3 6.023 x 10^23 molecules

= 1.67 x 10^21 molecules

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