Mg+2HCl==MgCl2+H2 24``73````95````2 x````y````z`````0.4 x=4.8g 1.镁带中氧化镁的质量分数=(6-4.8)/6=20% 2.y=14.6g,与镁反应的盐酸的质量=14.6g/14.6%=100g MgO+2HCl==MgCl2+H2O 40```73`````95 1.2```m```` `n ...