Hydrogen gas reacts with oxygen to form water. 2H2(g) + O2(g) à 2H2O(g) ∆H = -483.5 kJ
Determine the mass of hydrogen gas required to produce 226 kJ of heat.
(A) 8.64 g
(B) 1.89 g
(C) 0.944 g
(D) 3.77 g

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.