Which statements accurately describe binary star systems? Check all that apply. have more than two stars have stars that are always visible include large groups of stars have stars that might appear to wobble often have one star that is brighter than the other

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.

Why do electrons further from the nucleus have more energy

How many grams of iron can be made from 16.5 grams of fe2o3