Pls help im being timed Which statement is most accurate about energy absorbed and released in this chemical reaction?

Mg(OH)2 → MgO + H2O [ΔH = 37.1 kJ]

A. It is an endothermic reaction and energy is released from the system

B. It is an endothermic reaction and energy is absorbed by the system

C. It is an exothermic reaction and energy is absorbed by the system

D. It is an exothermic reaction and energy is released from the system

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?

Is laundry detergent an acid or a base?

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .