Question

A voltaic cell is made of a Ga strip dipped into 1.00 M Ga(NO) and the SHE plus the other necessary cell components. After the cell has operated for several minutes, 0.450 L of H(g) at STP are generated. How many grams of Ga have been oxidized in this process? Assume there is 1.00 L of solution.

Answer 1

$$n(H_2) = 0.450L/22.4(L/mol) = 0.02 mol$$

$$m(Ga) = nM = 0.02*69.723/1.5 = 0.92964 g$$