0.8g Ca,0.3g Mg,0.2g Cu,0.01g Fe,求四种元素物质的量的比

问题描述:

0.8g Ca,0.3g Mg,0.2g Cu,0.01g Fe,求四种元素物质的量的比

马上n(Ca):n(Mg):n(Cu):n(Fe)=0.8/40:0.3/24:0.2/64:0.01/56 =0.02:0.0125:0.003:0.00018 =1000:625:150:9