Calculate the no. Of molecules in 20 g of oxygen gas
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number of moles = given mass / molar mass
= 20/32
= 5/8
number of molecules = no. of moles × Avogadro no.
= 5/8 × 6.022×10²³
= 3.76 × 10²³ mllecules
= 20/32
= 5/8
number of molecules = no. of moles × Avogadro no.
= 5/8 × 6.022×10²³
= 3.76 × 10²³ mllecules
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