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Calculate the number of atoms in each of the following : (i) 52 moles of Ar(ii) 52 u of He (iii) 52 g of He |
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Answer» 52 mole Ar `=52 xx 6.022 xx 10^(23)` atoms `=3.131xx10^(25)` atoms (ii) 4 u He `=` 1 He atom 52 u He `= (52)/(4) = 13` He atoms `=3.131 xx 10^(25)` atoms (ii) 4 u He `=` 1 He atom 52 u He `=(52)/(4) = 13` He atoms (iii) 1 mole He molecule `=4 g = 6.022 xx 10^(23)` atoms 52 gm He `=(52xx6.022xx10^(23))/(4)` atoms `=7.8286xx10^(24)` atoms |
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