Why would you use a solution, such as a cabbage pH indicator, to measure the pH of household items? to see if food went bad to test the safety of water to make sure conditions are safe to use up old cabbage

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 .

Which characteristics can be used to differentiate star systems? check all that apply.

What is the main reason why some developing countries fear the increase the free trade policies around the world?