A museum wants to store their valuable documents in cases that contain a gas that will protect the documents. The museum director should choose Choose... = chlorine gas, oxygen gas, a noble gas, a halogen.
She should not choose one of the other gases because they are too
Choose... = expensive, reactive, smelly, unreactive.

This is a mixture that has the same composition throughout.

1. combine iron and copper (ii) sulfate solution. (hint: iron will form the iron (iii) ion) fe + cuso4 → 2. combine lead (ii) nitrate and potassium iodide solutions. pb(no3)2+ kl → 3. combine magnesium metal and hydrochloric acid solution. mg + hcl → 4. electrolysis (splitting) of water. h2o → 5. burning magnesium. mg + o2 →

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?