In a neutralization reaction with a strong acid or base, all of the hydrogens from the acid and the hydroxides from the base react to form water.
Balance the following neutralization reaction:
H3PO4 (aq) + NaOH (aq) â H2O (l) + Na3PO4 (aq)
Enter the appropriate coefficient to the left of the respective term. In the event that your coefficient would be "1" be sure to write "1" as opposed to leaving it blank.

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.)