How many grams of kr are in a 4.19 l cylinder at 84.9 °c and 2.59 atm?

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Word equation for k+ h2o yield koh + h2