Determine the molarity of a solution prepared by dissolving 4.50 mol of nh4cl in sufficient water to make 2.00 l of solution.

How many hydrogen atoms are in the following molecule of ammonium sulfide? (NH4) 2S

6 moles of benzene react with 33.75 moles of oxygen to produce carbon dioxide through the chemical reaction below. 2C6H6 + 1502 + 12CO2 + 6H2O What is the limiting reactant in this reaction?

Anne is trying to attract her metal pencil box with a magnet from the other side of her desk. The pencil box does not move. What is most likely true? * The pencil box is repelling the force of the magnet.

What kind of elements do not give, receive or share electrons?

When a nucleus undergoes nuclear decay by gamma rays the atomic number of the element?

Which of the following is a possible equivalence that can be used in a conversion? A. ten to the negative second power hL over one L B. ten to the negative second power cL over one L C. ten to the first power L over one daL D.

Which process is a chemical change? burning a match boiling water melting ice breaking glass

What form of matter is "vapor"? a. a solid made of a substance that is usually liquid c. a gas made of a substance that is usually solid b. a liquid made of a substance that is usually gas d. a gas made of a substance that is usually liquid

Which of the following atoms releases more energy than oxygen when an electron is added to its valence energy level? Select one: a. helium (He) b. fluorine (F) c. carbon (C) d. nitrogen (N)

End-users of natural gas include (check all that apply) :