Question

calculate number of molecules present in 1 g of water​

Answer 1

Answer:

This is

1 mole = 18 gram = 6×10^23 molecules

1 gram = ?

1 gram= 18/6×10^23 atoms

1 gram =3×10^-23 atoms

Answer 2

Answer :

Mass of water = 1g

We have to find number of molecules present in the sample of water$.$

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◈ First of all we need to find moles of water. No. of moles is measured as the ratio of mass of substance to the molar mass of susbstance.

Molar mass of water = 18 g/mol

➝ moles = w / Mw

➝ moles = 1/18

We know that, 1 mol substance contains 6.022×10²³ molecules.

Hence, no. of molecules in water

• n = 1/18 × 6.022 × 10²³
• n = 3.34 × 10²²