Which substances have Delta. Hf = 0 kJ/mol by definition? Select all that apply. O2(g) N(g) H2O(l) Br2(l) Fe(s) He(g) S6(s).

Based on the equation and the information in the table, what is the enthalpy of the reaction?

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

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.