1. Which does not describe the mole? A. a unit used to count particles directly
B. it is equal to the 24.2L of a gas at STP
C. the SI unit for the amount of a substance
D. Avogadro's number of molecules of a compound

What three natural resources are found in the great lakes region

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease. correct answer for apex - a, its nonpolar end dissolves the grease.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.