Calculate the number of moles is 52 g of he (helium). [at. Mass: o = 16 u, he = 4 u]
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52 g he= n moles × mass
==> 52=n×4
==> n= 52/4= 13 moles
similarly for oxygen... 52/16= 3.25 moles oxygen atoms
and 52/32= 1.625 moles O2 molecules
I hope it helps
==> 52=n×4
==> n= 52/4= 13 moles
similarly for oxygen... 52/16= 3.25 moles oxygen atoms
and 52/32= 1.625 moles O2 molecules
I hope it helps
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