Question

what is the mass of :- a) 0.2 mole of oxygen atoms. b). 0.5 mole of water molecule

Answer 1

a) 1 mole of O2 weighs = 32 g (since 1 mole of any substance weight is its G.M.M)
Therefore 0.2 moles O2 weighs = 32*0.2 = 6.4 g

b) 1 mole H2O weighs = 18 g
Therefore 0.5 moles of H2O weighs = 0.5*18 = 9 g

Answer 2

☺ Hello mate__ ❤

◾◾here is your answer...

Approach to solving Question :- first we calculate mass of 1 mole. After this multiplying this by given no. Of mole.

(a) Mass of one mole of oxygen atoms = 16g Then, mass of 0.2 mole of oxygen atoms

= 0.2 × 16g = 3.2g

(b)Mass of one mole of water molecule = 18g Then, mass of 0.5 mole of water molecules

= 0.5 × 18g = 9g

I hope, this will help you.

Thank you______❤

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