配制质量百分比浓度为20%、密度为1.14克厘米 设需要浓硫酸的体积为x,500mL=500cm 3 x?1.84g∕cm 3×98%500cm 3×1.14gcm 3×20%解得x=63.2cm 3 63.2cm 3=63.2mL加水的体...