CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
Using the formula n=Mm and number of particles, N=n×NA , calculate the following:
(a) The number of water molecules in 2.50 mol of water.
(b) The number of oxygen molecules in 64 g of oxygen.
(c) The number of oxygen atoms in 64 g of oxygen.
(d) The total number of atoms in 1 g of SiO2 .
(e) The mass of one molecule of CO2 .
(f) The mass of hydrogen atoms in 0.040 mol of C2H6 .