Question

1. what happens to the lead in used car batteries? 4. list two ways chemists help with issues related to lead contamination.

Explanation:

For question 3: Used car batteries often contain lead - acid. When recycled, the lead is typically recovered. It can be melted down and refined. The lead may be reused in new batteries or other lead - based products.
For question 4: Chemists can develop new methods for lead extraction and recycling that are more efficient and less environmentally harmful. They can also create analytical techniques to accurately measure lead levels in the environment (such as in soil, water, and air) to assess the extent of contamination.

Answer:

1. The lead in used car batteries is often recycled. It can be melted, refined, and reused in new batteries or other lead - containing products.
2. - Develop more efficient and environmentally - friendly lead recycling methods. - Create analytical techniques to measure lead levels in the environment.