Question

9.70 grams of nitrogen gas are allowed to react with 5.44 grams of oxygen gas.
What is the maximum amount of nitrogen monoxide that can be formed?
What amount of the excess reagent remains after the reaction is complete?

Answer 1

since N2 + O2 = 2NO,

each mole of N2 requires 1 mole of O2.

convert your grams to moles, and the molecule with the fewer moles is the limiting reagent.