Question

Calculate (a) mass of 2.5 gram atoms of Mg

(b) Gram atoms in 1.4 grams of Nitrogen (At. Mass : Mg = 24, N=14)

Answer 1

for (a) there is a simple method that is criss cross method...jst for original weight of Mg is 24 that gives 6×10(23) then for given weight of Mg is 2.5g which gives hiw many atoms...that is 2.5×6×10(23)/24=0.6×10(23)