A certain sample of gas contains 2.00 g of hydrogen, 3.00 g of oxygen, and 0.500 g of nitrogen. What's the mole fraction of each gas in this mixture?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

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.

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas