Calculate ΔH for 2NO (g) + O2 (g) → N2O4(g) using the following information N2O4 (g)→ 2NO2 (g) ΔH = 57.9 KJ ,
2NO (g)+O2(g) → 2NO2 (g) ΔH= -113.1 KJ
a) 2.7KJ b) -55.2KJ c) -85.5 KJ d)-171.0 KJ e) +55.2KJ
Is the answer d?

Each of the following compounds contains a metal that can exhibit more than one ionic charge. provide systematic names for each of these compounds. (a) cr(clo3)6 (b) mo(cn)6 (c) cr2(so3)3 (d) v(clo2)2 (e) v(cn)5 (f) os(clo2)4

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

What are the major types of a chemical compound