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Mass of 112 ML of abcartin gas is 0'22 g at STP?how many molecules are there in the sample of gas? What is the molar mass of the gas? |
Answer» Given :-Volume = 112ML = 0.112L MASS = 0.22g To FIND :-Number of molecules Molar mass Solution :-We know :- No of moles = Volume/Molar volume No of moles = 0.112/22.4 No of moles = 5 × 10^-3 Number of molecules = Avogadro number × No of moles Number of molecules = 6.022 × 10^23 × 5 × 10^-3 Number of molecules = 30.11 × 10^20 Molar mass = Given mass/No of moles Molar mass = 0.22/5×10^-3 Molar mass = 0.044 × 10^3 Molar mass = 44g |
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