How do rain and snow remove particles from the atmosphere

You need to make 500ml of 7h9(+) media with 1x adn and 30ug/ml of the antibiotic kanamycin. your stock solutions are 10x adn and 30mg/ml of kanamycin. the solvent is distilled water. how much of each component will you need to make the desired final solution?

What is called the "building block" of life?

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water