1) Mr (Cu2O) = 2 * 64 + 16 = 144
w (Cu) = 128/144 * 100% = 89%
w (O) = 16/144 * 100% = 11%
2) Mr (CuO) = 64 + 16 = 80
w (Cu) = 64/80 * 100% = 80%
w (O) = 16/80 * 100% = 20%
3) Mr (CuSO4) = 64 + 32 + 4 * 16= 160
w (Cu) = 64/160 * 100% = 40%
w (S) = 32/160 * 100% = 20%
w (O) = 64/160 * 100% = 40%
<span> W(cU) - это что такое?</span>
2CH3COOH+2Na=2CH3COONa+H2
v (CH3COOH )/2=v (H2)=0.6моль/2=0.3 моль
V (H2)=0.3моль*22.4л/моль=6.72л
CH₃COOH + C₂H₅OH = CH₃COOC₂H₅ + H₂O
по уравнению реакции
m(CH₃COOH)/M(CH₃COOH)=m(CH₃COOC₂H₅)/M(CH₃COOC₂H₅)
масса этилацетата
m(CH₃COOC₂H₅)=M(CH₃COOC₂H₅)m(CH₃COOH)/M(CH₃COOH)
m(CH₃COOC₂H₅)=88,1г/моль*5г/(60,1г/моль) = 7,33 г
теоретически образуется 7,33 г эфира
<span>NH4Cl+NaOH-> NH3+NaCl+H2O
4NH3+5O2-> 4NO+6H2O
2NO+O2-> 2NO2->
4NO2+2H2O+O2=4HNO3
2HNO3+Na2O=>2NaNO3</span>+H2O