5. A chemical reaction proceeds until it reaches an equilibrium. Which statement is true when the reaction is
at equilibrium?
a. All the reactants are used up.
b. The reaction is completed and will not change.
c. One reactant is used up, but one or more of the other
reactants are still present.
d. Both products and reactants are present.

ucd e e. rr. t t t t t t. to

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

you're crazy : )