2h2 o2 -> 2h2o how many grams of o2 and h2 were reacted to produce 30.0 g of h2o?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

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.

What type of matter is made of only one kind of atom