You are given the initial concentrations of a reaction and you are asked to calculate the concentrations in equilibrium. In some cases you need an equilibrium constant, in other cases you don’t. When do you need it? When do you not need it?

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?