Consider the balanced equation
4nh3 + 3o2 --> 2n2 + 6h2o what is the mole ratio of nh3 to n2?
2: 4
4: 2
4: 4
7: 2

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

Rays from the sun are not considered matter true or false