It turns out that the van der Waals constant bb equals four times the total volume actually occupied by the molecules of a mole of gas. Calculate the fraction of the volume in a container actually occupied by ArAr atoms (bb

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 .

What diagram shows the ionic compound of magnesium oxide

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer