How much kerosene must be burned so that a heat equal to 10 MJ is released?

Decision:
1) We translate the heat into the necessary, more convenient calculation system:
Q = 10 MJ = 10,000,000 J = 10 ^ 7 J
2) Find the amount of released heat by the formula:
Q = qm.
q is the specific heat of combustion of the substance in J / kg. m is the mass.
3) It is necessary to find the specific heat of combustion of kerosene, it is written in the table:
q = 4.6 * 10 ^ 7 J / kg
4) We express the mass from the above formula and substitute the known values into it:
m = Q / q = 10 ^ 7 / 4.6 * 10 ^ 7 = 0.217 kg
Answer: 0.217 kn