What are some of the benefits that light rail transit can provide a metropolitan area? Do you think the benefits are worth the expense of these systems?

I need help fast please and a least 4 complete sentences and please check your grammar!!! Tysm I appreciate this :)

Which metals are called noble metals

Which proportionality applies to avogadro’s law?

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.