InterviewSolution
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InterviewSolution
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dwing elementsCa vAO3, 23 amu (i) 19, 19 amu) ,1.000 amu. (v) 40, 40 amu, () 108, 108 amu.A sample of (CHethane has the same mass an 10' molemolecules doos the sampla contain ?mass as 10' molecules of methana. How many Gh |
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Answer» Molar mass of methane = 16 g/mol1 mole of methane contains = 6.023 x 10^23 molecules Mass of 6.023 x 10^23 molecules of methane = 16 gMass of 1 molecule of methane = 16/ (6.023 x 10^23 ) g Mass of 10 million molecules o molecules = [16/ (6.023 x 10^23 ) ] x 10^7 = 2.65 x 10^-16 g Thus mass of ethane sample = 2.65 x 10^-16 g Molar mass of ethane or mass of 1 mole of ethane = 30 g/mol If 30 g of ethane contain = 6.023 x 10^23 moleculesThen 2.65 x 10^-16 g of ethane contains = [6.023 x 10^23 /30] x 2.65 x 10^-16 = 5.3203 x 10^6 molecules of ethane |
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