The amount of matter in an object is considered to be its size volume area mass density

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?