Problem

Calculate the following: (a) the number of moles of sodium atoms in 10.0 g of sodium (b) the mass of 0.300 mol of

\text{Cu}(\text{NO}_3)_2

\text{cm}^3

of methane at STP (e) the volume of 0.25 mol of

\text{CO}_2

at STP (f) the concentration of 300

\text{cm}^3

of solution containing 0.20 mol of solute (g) the number of moles of NaCl in 75

\text{cm}^3

of solution with a concentration of 0.15

\text{mol dm}^{-3}

(h) the concentration of 150

\text{cm}^3

of solution that contains 2.50 g of

\text{FeSO}_4