化学方程式计算,因为化学方程式中各物质的质量与相对分子质量与化学计量数的乘积成正比.
例如,
工业上高温煅烧石灰石(CaCO3)可制得生石灰(CaO)和二氧化碳,如果要制取5.6 t氧化钙,需要碳酸钙多少吨?
设需要碳酸钙的质量为x.
CaCO3 CaO+CO2↑
100 56
x 5.6 t
x= =10t.
答:需要碳酸钙10 t.
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