Question

7.5 g of ethane has how many carbon atoms

Answer 1

Eth means 2 carbons

7.5g = 7.5 ×2

= 15

Therefore, 15 carbon atoms are present in 7.5g of ethane

Answer 2

no ofmoles (n)=wt/molecular wt.

n=7.5/30. (30 is molecilar weight of ethane). 23

nxavagadro number(6×10 )×atomicity= no of carbon atoms.

23

no of carbon atoms = 7.5/40×6×10. ×2=3×10power23