Which of these statements are true? Select all that apply. The AHp for Br2(l) is 0 kJ/mol.
The AHş for He() is 0 kJ/mol.
The AHf for Hg(l) is 0 kJ/mol.
The AHF for Cl2(g) is 0 kJ/mol.
The AHF for N2(l) is 0 kJ/mol.

In a chemical reaction at equilibrium, the rate of the forward reaction the rate of the reverse reaction. if the rate of the forward reaction more products are formed.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.