При сгорании некоторой порции ув получено 0, 3 моль воды и 0, 4 моль оскида углерода(iv определите молекулярную формулу углеводорода , если его плотность при н.у. равна 2, 41 г/л.

Решение см во вложении

4P+5O =2PO

PO +3HO = 2HPO

2HPO+ 3CaO = Ca(PO)+3HO

2HO+2Na = 2NaOH+ H

3NaOH + HPO = NaPO + 3HO

7. Si +O = SiO

SiO + 2NaOH = NaSiO + H2O

NaSiO + 2HCl = 2NaCl + HSiO

HSiO = SiO + HO

SiO+ LiO = LiSiO

8. 2 Ca + O = 2CaO

CaO + CO = CaCO

CaCO + 2HCl =CaCl + CO + HO

CaCl + 2NaOH = Ca(OH) +2NaCl

Ca(OH) + NaCO = CaCO + 2NaOH

9. NO + HO = 2HNO

2HNO+ CaO = Ca(NO) + HO

Ca(NO) + NaCO = CaCO + 2NaNO

CaCO + 2KNO = Ca(NO) + KCO

Ca(NO)+ Ba(OH) = Ca(OH) + Ba(NO)

10. Mg(OH) = MgO + HO

MgO + NaCO = MgCO + NaO

MgCO + 2HCl = MgCl + CO + HO

MgCl + 2KNO = Mg(NO) + 2KCl

3Mg(NO) + 2NaPO = Mg(PO) + 6NaNO

1) Do you like to go to the theatre?

1) Do you like to go to the theatre?2) Which kind of film do you prefer?

1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?

1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?

1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?

1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?6) Do your parents go with you to the cinema or you watch films at home on TV?

1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?6) Do your parents go with you to the cinema or you watch films at home on TV?7) With whom you prefer to go to the theatre: with your friends or with your parents?