A bottle of cleaning fluid has a total mass of 2.25 kilograms, 315 grams of which is HCl. What is the mass percentage of HCl in this solution? (make sure your mass units are the same - convert both to either kilograms or grams) :)

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?

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

The fact that the total amount of energy in a system remains constant is a(n)