Ответы на вопрос:
Mr(ca3(po4)2)=3*40+2*31+8*16=310 w(ca)=120/310=0.39=39% w(p)=62/310=0.2=20% w(o)=128/310=0.41=41%
СH4Cl+Cl2=CH3Cl+HCl
2CH3Cl+2Na=2NaCl+ C2H6
C2H6=C2H4+H2
C2H4=C2H2+H2
C2H2+O2=CO2+H2O
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