Question

When 3.20 g of methane burns in oxygen, 160 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole of methane under these conditions?

Answer 1

The answer is 802.5 kJ/mol. The work is included in the attached image

Step-by-step explanation:

All that needs to be done is kj/gram into kj/mol. to convert from grams to mols, you need to multiply by the molar mass, which is easy to calculate using a periodic table.