How can you lower the ph of the vinegar?

boil the vinegar to concentrate it.
mix the vinegar with sugar to thicken it.
add water to the vinegar to dilute it.
freeze the vinegar to change its state.

What is the correct term for living the most sustainable life you can within your current circumstances?

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.)

May someone me with these science questions