0.8g钙0.3g镁0.2g铜和0.01g铁的物质的量之比是

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0.8g钙0.3g镁0.2g铜和0.01g铁的物质的量之比是
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0.8g钙0.3g镁0.2g铜和0.01g铁的物质的量之比是
0.8g钙0.3g镁0.2g铜和0.01g铁的物质的量之比是

0.8g钙0.3g镁0.2g铜和0.01g铁的物质的量之比是
n(Ca):n(Mg):n(Cu):n(Fe)=(0.8/40):(0.3/24):(0.2/64):(0.01/56)=224:140:25:2

0.8除以40,0.3除以24,0.2除以64,0.01除以56.得224:140:35:2