What is the mass of 5.119 x 10^23 molecules of copper sulfate

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.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?