2AgNO3+BaCl2+Ba(NO3)2+2AgCl
Признак реакции - осадок
H₂O + SO₂ = H₂SO₃
KCl + SO₂ ≠
2KOH + SO₂ = K₂SO₃ + H₂O
BaO + SO₂ = BaSO₃
1)6CO2+6H2O=C6H12O6+6O2
CH2OH-(CHOH)4-COH+H2=CH2OH-(CHOH)4-CH2OH
2)CH2OH(CHOH)4-COH+Ag2O=CH2OH-(CHOH)4-COOH+2Ag
CH2OH-(CHOH)4-COOH+NaOH=CH2OH-(CHOH)4-COONa+H2O
3)C6H12O6=2C2H5OH+2CO2
C2H5OH=C2H4+H2O
C6H12O6=H3C-CH-COOH+2CO2+2H2
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CH3
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Дано
m (Al) = 2,7 г
Найти:
n (Al) - ?
Решение:
n (Al) = m(Al) / Ar(AL) = 2,7 г / 27 г/моль = 0,1 моль
Ответ: 0,1
W = (170*0.1 +8)/250 * 100%=(17+8)/250*100%=25/250*100% = 10%