When solving mass to mass stoichiometry problems, where do you get the molar mass for a chemical?

Asolution at 25 degrees celsius is 1.0 × 10–5 m h3o+. what is the concentration of oh– in this solution?

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration?

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?