Calculate H for the reaction: 2NO(g) + O2(g) —> 2NO2(g) given the following data: Reaction 1 [1/2N2(g) + 1/2O2(g) —> NO(g) H= 90.4 kJ] Reaction 2 [1/2N2(g) + O2(g) —> NO2(g) H=33.9 kJ]

Starch and are common polysaccharide carbohydrates found in plants. sucrose glycogen fructose cellulose

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size