Question

De acuerdo a la reacción

C2H6 + O2 -------- CO2 + H2O

a) cuantos Kg de O2 necesitan 20 gr de C2H6

b) cuantos Kg de CO2 son producidos con 5 Kg de C2H6

c) cuantos moles de H2O producen 5x 10 -3 moles de O2

Answer 1

                               2C2H6  + 7 O2 → 4CO2 +  6 H2O

Mm C2H6 = 30 g/mol
         CO2 = 44 g/mol
          H2O = 18  g/mol
            O2 = 32 g/mol

1. masa de O2

Kg O2 = 20 g C2H6  x  1 mol C2H6  x  7 mol O2  x  32 g O2  x  1 Kg O2
                                      ````````````````    ``````````````    ````````````    `````````````
                                        30 g C2H6    2 mol C2H6   1 mol O2    1000 g O2

Kg = 0.0746 de oxigeno

2. m Kg CO2 = ?

Kg CO2= 5 Kg C2H6 x 1000 g C2H6 x 1 mol C2H6 x 4 mol CO2 x 44 g CO2
                                      ``````````````````   `````````````````   ```````````````  `````````````
                                         1 Kg C2H6      30 g C2H6    2 mol C2H6 1mol CO2

Kg = 14666 de CO2

3.  MOLES DE H2O =?

m H2O = 5 x 10⁻³ moles O2  x   6 mol H2O
                                                 ```````````````````
                                                     2 mol O2

n H2O = 0.015 moles