How many grams of hexynyl lithium should be produced?  1-hexyne (0.22 mL) + LiHMDS (1.0 mL of 1.0 M solution in THF) = hexynyl lithium

A bottle contains 72 mL of vanilla extract solution.  If the solution contains 59 mL of alcohol, what is the volume percent (v/v) of the alcohol in the extract solution?   Question 8 options:   72% (v/v)   36% (v/v)   82% (v/v)   18% (v/v)

Question: A solution is 21.4% (v/v) Br2 and has a density of 1.18 g/mL. What mass of this solution is needed to have 86.5 mL of Br2?

Please help with both questions!