According to the following thermochemical equation, what mass of h2o (in g) must form in order to produce 3900 kj of energy?
sio2(s) + 4 hf(g) → sif4(g) + 2 h2o(l) δh°rxn = -184 kj sio2(s) + 4 hf(g) → sif4(g) + 2 h2o(l) δh°rxn = -184 kj 216 g 382 g 763 g 408 g 272 g

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.