**飞扬年代2011-03-06TA获得超过300个赞关注解:设R的相对**质量为XRO+H2SO4===RS04+H20X+16X+9616g(16+144)X20%求出X=64设:稀硫酸的溶质质量分数为YRO+H2SO4===RS04+H2064+169816g144Y求出Y=13.6%