if 0.750 moles of h2o are formed in the following reaction how many moles of ammonia are used? 4nh3 5o2=2no 6h2o

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car