Hydrogen peroxide decomposes back to water and oxygen when exposed to air and light. When bought at a pharmacy for home use, hydrogen peroxide is sold in dark bottles that are labeled as a concentration of 3% by weight. A chemistry student wants to test the concentration of hydrogen peroxide that has been decanted to light and dark bottles, and exposed to air for 10, 20 and 30 hours. The concentration is tested by titration with potassium permanganate, and each sample is tested twice. answer choices are: color/hours, 2, 6, 12, dark/light, 10/20/30 hours, and concentrationquestions: Response variable (s):Factor(s):Experimental Unit (s):Replication(s):Treatment(s):

Response variable (s)-concentration, (s): Treatment- 2,6,12 hours,Replication(s)-10/20/30 hours

Experimental Unit- dark/light

Factors-color/hours

Step-by-step explanation:

Factors refer to explanatory variables tat are being studied in an experiment. They are manipulated in order to obtain a response (dependent) variable.

Treatments refer to a combination of factor levels in the experiment. Each factor has two or more levels

The experimental unit refers to the physical entities assigned at random to treatments during the experiment.

Replication refers to the number of times the same experiment is carried out. It enhances the reliability of the result of an experiment.

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

answer: i think it is (1,-2)