For a certain chemical reaction, the reactants contain 52 kJ of potential energy, and the products contain 32 kJ. How much energy is absorbed or
released by the reaction?
A. 20 kJ is absorbed.
B. 84 KJ is released.
C. 20 kJ is released
D. 84 kJ is absorbed.

Matches the chemical name of each oxide of phosphorus to its chemical formula

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?