Question

Calculate the number of moles of the following :
(i) 52g helium ( get mole from mass)
(ii) 5.6g of Fe

Answer 1

Answer:

mole of helium is 12.991549

mole of iron is 0.100277554

Explanation:

since molecular mass of helium is 4.002602u

by using formula of mole concept which is

mole=given mass/ molar mass

mole=52/4.002602

mole=12.991549 mole

molar mass of iron is 55.845u

using mole formula

mole= 5.6/55.845

mole= 0.100277554