<p> 1∕2ZnO的摩尔质量为m=40.6897g∕mol,配制0.1000mol∕L的1∕2ZnO基准物溶液500mL,需称取基准氧化锌Wg:<br> W=<img src="http://que-oss.fenziquan.com/web/akimg/asource/2015043009242799511.png">•V=<img src="http://que-oss.fenziquan.com/web/akimg/asource/2015043009244722491.png">×500=2.0345g<br> 配制0.1000mol∕L的1∕2ZnO基准物溶液500mL,需称取2.0345克固体氧化锌。</p>