TIME LIMIT HELP
A sulfuric acid solution of unknown molarity is titrated with 2.450 M lithium hydroxide solution. The titration requires 0.0625 L of the lithium hydroxide solution to reach the equivalent point with 30.00 mL of the sulfuric acid solution. What is the molarity of the acid solution?

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.)