1. A laser beam is reflected off a plane mirror, as shown below. What must be the measure of the angle of incidence of the beam?

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

How do you know when a chemical reaction has occurred

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.