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2014-09-07T20:48:32+03:00
CaC2 + H2O ---> C2H2 + CaO
puritatea = masa pura/masa impura * 100 => masa pura = 64*50/100 = 32 g 
32 g CaC2............x l C2H2
64 g CaC2............22.4 l C2H2        x = 44,8 l C2H2
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