Put questions to the bold-typed words, I. Diamond occurs naturally.2. Graphiteis a good conductor of electricity.3. The hardness results from the structure.4. The crystalline allotrope is fullerite5. Graphite can be produced by Acheson process, 6. Carbon occurs inorganic compounds.7. The layers held together by weak van der Waals' forces.8. Diamond is extremely hard.9. There are several amorphous forms of carbon: carbon black andcharcoal.boilpro10. Carbon forms a large number of compounds because of itsunique ability to form covalent bonds.11. Graphite bas variety of uses including electrical contacts, high-temperature equipment and solid lubricants.is a soft black slippery substance.​

3NH3 + H3PO4 = (NH4)3PO4

H3PO4 - фосфорная кислота

NH3 - аммиак

(NH4)3PO4 - фосфат аммония ( средняя соль)

     Х л                             Х г                       1 моль

    3NH3       +             H3PO4       =      (NH4)3PO4

n = 3 моль                   n = 1 моль           n = 1 моль

Vm=22,4 л/моль         Mr = 98 г/моль    

V = 67,2 л                   m = 98 г

Х л NH3   -    1 моль (NH4)3PO4

67,2 л NH3 -  1 моль (NH4)3PO4

V(NH3) = 67,2 * 1 / 1 = 67,2

Х г Н3РО4   -    1 моль (NH4)3PO4

98  г Н3РО4  -   1 моль  (NH4)3PO4

m(H3PO4) = 98 * 1 / 1 = 98 г

 Х г  Хмоль                                            10,2 г

  4 Al            +           3O2          =          2Al2O3

n = 4 моль                                            n = 2 моль

Mr = 27 г/моль                                      Mr = 102 г/моль

m = 108 г                                               m = 204 г

Х г Al       -       10,2 г Al2O3

108 г Al   -       204 г Al2O3

m(Al) = 108 * 10,2 / 204 = 5,4 г

Х моль Al    -    10,2 г Al2O3

4 моль Al    -     204 г Al2O3

n(Al) = 4 *10,2 / 204 = 0,2 моль