Thermochemical Equations Answers

Which of these statements are true? Select all that apply.The Hf for Br2(I) is 0 kJ/mol.The Hf for He(I) is 0 kJ/mol.The Hf for Hg(I) is 0 kJ/mol.The Hf for Cl2(g) is 0 kJ/mol.The Hf for N2(I) is 0 kJ/mol.