How many molecules are in 45.0 g of water

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asked Apr 6, 2022 142k views

1 Answer

Gregtzar · Answer 1 · 2022-04-12T10:21:49+0000

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

How many molecules are in 45.0 g of water

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