How many atoms are in 3.3 moles of copper atoms?
a. 1.9 x 10 atoms
b. 2.0 x 10^23 atoms
c. 2.0 x 10^24 atoms
d. 2.0 x 10^-23 atoms

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

What state of matter is ice a. liquid b. element c. solid d. gas

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves