When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?

Can someone me with these questions plz.

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?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?