87.5%
鈣元素質(zhì)量分數(shù)÷CaCO3中鈣元素的質(zhì)量分數(shù)=CaCO3的質(zhì)量分數(shù)
35%/(40/100)=87.5%CaCO3的質(zhì)量除以CaCO3加SiO2的質(zhì)量按照這樣列可以嗎？這種列法我看不懂謝謝可以，但很麻煩。用我的算法計算即可。鈣元素質(zhì)量分數(shù)÷CaCO3中鈣元素的質(zhì)量分數(shù)=CaCO3的質(zhì)量分數(shù)，那么這是為什么呢= =，理解不了哎CaCO3的質(zhì)量分數(shù)=CaCO3的質(zhì)量/樣品的質(zhì)量鈣元素質(zhì)量=CaCO3的質(zhì)量×CaCO3中鈣元素的質(zhì)量分數(shù)可以改變?yōu)镃aCO3的質(zhì)量=鈣元素質(zhì)量/CaCO3中鈣元素的質(zhì)量分數(shù)CaCO3的質(zhì)量分數(shù)=(鈣元素質(zhì)量/CaCO3中鈣元素的質(zhì)量分數(shù))/樣品的質(zhì)量=鈣元素質(zhì)量分數(shù)/CaCO3中鈣元素的質(zhì)量分數(shù)數(shù)學(xué)推導(dǎo)問題。唉還是搞不懂啊。。。我數(shù)學(xué)的確很差，該怎么辦啊。。。