What is the purpose of adding alum in the water treatment process?

Since 1983, pennies have been made with zinc and plated with copper. Prior to 1983, pennies were about 95% copper and 5% tin and zinc. However, from 1793-1837, pennies were pure copper. If you had a penny from 1800 that had a mass of 2.

What is a watershed? A. An area of land where all the water drains into the same place. B. The area around a river C. The area around a pond D. The groundwater below a river

Which units describe the molarity of an aqueous sucrose solution? moles of sucrose per liter of solution grams of solution per liter of solution moles of sucrose per mole of water grams of sucrose per mole of sucrose?

If there is 10 protons and 12 neutrons and 10 electrons what is the total charge

So the concentration of HCl you computed was of the true value, 0.120 M

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller

How do you tell if a compound is polar or non polar

What two ions are central to the arrhenius definitions of acids and bases?