Question

In the reaction between aluminum and oxygen to form aluminum oxide, how many
grams of aluminum will react with 10.0 L of oxygen at 735 mm Hg and 10º C?

Answer 1

1) p = 735 mm Hg = 735 *133.322 = 97991.7 Pa;
2) V = 10L = 0.01 m3 ;
3) T = 10 °C = 283 K;
4) ν = 97991.7*0.01/8.314*283 = 0.42 mol;
5) ν = 0.42*4/3 = 0.56 mol;
6) m = 0.56*26 = 14.56 g;
Answer: m = 14.56 g.