Please help!!

You have 5 moles of marbles. How many marbles is this?

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Is 9 correct? and can someone me with 10? it’s due tomorrow, you