Given the data:. N2 (g) + O2 (g) → 2 NO (g) ΔH° = +180.7 kJ 2 NO (g) + O2 (g) → 2 NO2 (g) ΔH° = -113.1 kJ 2 N2O (g) → 2 N2 (g) + O2 (g) ΔH° = - 163.2 kJ
using Hess’s Law the ∆H for the reaction below is kJ:.
N2O (g) + NO2 (g) → 3 NO (g)

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]