Chemistry questions attached

2.25 × 10³ kJ

Explanation:

You are given 2.81 moles of CH₄.  You need to find out how much heat is generated when this much CH₄ is burned.  The ΔH° of the reaction is -802 kJ/mol.  Multiply ΔH° by moles of CH₄ to find the amount of heat generated.

2.81 mol  ×  802 kJ/mol  =  2253.62 kJ  ≈  2.25 × 10³ kJ

i would say b

explanation:

but i think i would need more information than that