设三种金属的物质的量都为n,生成氢气的物质的量分别为X、Y、Z2Na + 2H^+ = Mg^2+ + H2↑2 1n XX=0.5n Mg + 2H^+ = Mg^2+ + H2↑ 1 1n YY=n2Al +6H^+ = 2Al^3+ +3H2↑ 2 3n ZZ=1.5n体积比等于物质的量之比=0.5n:n:1.5...