QUICK PLEASE What is the final concentration when 275 mL of 20.0 % W/V hydrogen peroxide solution is diluted to 1.000 L?

20.0 % W/V
0.30 % W/V
55.0 % W/V
5.50 % W/V

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction