17-03-2021
Chemistry

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how many molecules are in 45.0 g of water

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ericksan861 ericksan861

17-03-2021

1.5055*10²³

Given mass = 45g
Molar mass of H2O = 2+16 = 18g

Moles = Given mass/Molar mass
= 45/18 = 2.5moles

No of molecule in 1 mole = 6.022*10²³
No of molecue in 2.5 mole = 2.5*6.022*10²³
= 1.5055*10²³

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