25 grams of methane (CH4) is placed inside a constant volume calorimeter. After the fuel is burned, the temperature rises by 4.5 C. If the heat capacity of the calorimeter is 5.75 kJ/C, what is the heat released?

Express your answer in kJ/mole

Nitric oxide (no) can be formed from nitrogen, hydrogen and oxygen in two steps. in the first step, nitrogen and hydrogen react to form ammonia: n2(g) + 2 h_2(g) rightarrow 2 nh_3 (g) delta h = -92. kj in the second step, ammonia and oxygen react to form nitric oxide and water: 4 nh_3(g) + 5 o_2(g) rightarrow 4no(g) + 6 h_2o(g) delta h = -905. kj calculate the net change in enthalpy for the formation of one mole of nitric oxide from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al