A sample of ethane(C2H6) has the same mass as 1.5*10 20 molecules of methane(CH4). How many C2H6 molecules does the sample of gas contains? show through formula method not the unitary method.
Answers
Answered by
5
No.of molecules of methane=1.5×10^20 molecules
Mass of one mole of C2H6=30g
Mass of one mole of CH4=16g
1 Mole of substance contains 6.022×10^23 molecules
Mass of one mole of CH4=16g
1 mole of substance contains 6.022×10^23 molecules
Mass of 6.022×10^23 of methane=16g
mass of 1.5×10^20 molecules of methane=16×1.5×10^23=3.93×10^-3
30g of ethane contains 6.022×10^23 molecules
3.98×10^-3g of ethane will contain 6.022×10^23×3.98×10^-3 of ethane will contain 6.022×10^23×3.98×10^-3/30=0.8×10^20 molecule
=8×10^19 molecule
Mass of one mole of C2H6=30g
Mass of one mole of CH4=16g
1 Mole of substance contains 6.022×10^23 molecules
Mass of one mole of CH4=16g
1 mole of substance contains 6.022×10^23 molecules
Mass of 6.022×10^23 of methane=16g
mass of 1.5×10^20 molecules of methane=16×1.5×10^23=3.93×10^-3
30g of ethane contains 6.022×10^23 molecules
3.98×10^-3g of ethane will contain 6.022×10^23×3.98×10^-3 of ethane will contain 6.022×10^23×3.98×10^-3/30=0.8×10^20 molecule
=8×10^19 molecule
Similar questions