Comment
Share
Q)

# write the number of moles in 8g of helium

$(a)\;7 \\ (b)\;2\\(c)\;9 \\(d)\;5$

Comment
A)
Solution :
No of moles = given mass $\div$ molar mass
here given mass =8g
molar mass of helium $\approx$ 4g
So, $n= \large\frac{8}{4}$$=2$