How does a balanced chemical equation show the conservation of mass? O A. It shows that the number of each type of atom stays the same.
B. It shows that the mass of the reactants is greater than the mass
of the products when gases are produced by the reaction.
C. It shows that the total number of moles of substances stays the
same.
O D. It shows that the mass of the products is greater than the mass of
the reactants when a reaction increases the moles of substances.
SUBMIT

What is the solubility of substance?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Which three statements represent the benefits of performing experiments using computer simulations?