Question

The space shuttle burns liquid hydrogen and oxygen in the main engine.? If 102000 kg of liquid hydrogen is carried on particular launch. What mass of liquid oxygen is necessary for all the hydrogen burnt. 2H2(g) + O2(g)------> 2H2O

Answer 1

Question#46632 - Chemistry - Inorganic Chemistry

Question:

The space shuttle burns liquid hydrogen and oxygen in the main engine.? If 102000 kg of liquid hydrogen is carried on particular launch. What mass of liquid oxygen is necessary for all the hydrogen burnt. 2H2(g) + O2(g)---> 2H2O

Answer:

According to the reaction equation, two moles of hydrogen react with one mole of oxygen. Lets calculate the amount of moles of hydrogen:

$$n(H_2) = \frac{m(H_2)}{M(H_2)} = \frac{102000 \, \text{kg}}{0.002 \, \text{kg}} = 5.1 \times 10^8 \, \text{mol}$$

The mass of oxygen than can be calculated:

$$m(O_2) = \frac{n(H_2) \times M(O_2)}{2} = \frac{5.1 \times 10^8 \, \text{mol} \times 0.032 \, \text{g}}{\text{mol}} = 8160000 \, \text{kg}$$