Ba(OH)2 + Na2SO4 = BaSO4 + 2NaOHBa(2+) + SO4(2-) = BaSO4Ba(OH)2 + 2HNO3 = Ba(NO3)2 + 2H2OH(+) + OH(-) = H2OBa(OH)2 + CO2 = BaCO3 + H2OBa(2+) + 2OH(-) + CO2 = BaCO3 + H2OBa(OH)2 + FeCl2 = Fe(OH)2 + BaCl2Fe(2+) + 2OH(-) = Fe(OH)2
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дано
m(CxHy) = 8.4 g
m(CO2) = 26.4 g
m(H2O) = 10.8 g
D(возд) = 2.9
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CxHY-?
M(CxHy) = D(возд)*29 = 2.9 * 29 = 84 g/mol
n(C) = n(CO2) = m(CO2) / M(CO2) = 26.4 / 44 = 0.6 mol
n(H) = 2n(H2O) = 2(m(H2O) / M(H2O)) = 2*10.8 / 18 = 1.2 mol
n(C) : n(H) = 0.6 : 1.2 = 6 :12
C6H12
ответ C6H12
2Na+2H2O=2NaOH+H2 замещения, ОВР, экзотермическая, гетерогенная