Mole ConceptMedium
Question
If a rocket was fuelled with kerosene and liquid oxygen, then what mass of oxygen would be required for every litre of kerosene? Assume kerosene to have the average composition C14H3O and density 0.792 g/ml.
Options
A.5.504 kg
B.2.752 kg
C.1.376 kg
D.3.475 kg
Solution
$C_{14}H_{30} + \frac{43}{2}O_{2} \rightarrow 14CO_{2} + 15H_{2}O$
$198g \frac{43}{2} \times 32\text{ g}$
$\therefore 792\text{ g} \frac{43 \times 16}{198} \times 792 = 2752\text{ g}$
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