3H2+Fe2O3→2Fe+3H2O How many moles of iron will be produced if 3.3mol of hydrogen gas reacts with 1.5mol of iron oxide?

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.

State one important difference between a physical change and a chemical change?