Which statement best represents a proper hypothesis? I think there is no effect on hearing if you listen to loud music for only three hours a day.

Water will flow faster through tightly packed soil than through loosely packed soil.

If different types of leaves are exposed to low temperatures, then they will change colors.

Grapes taste better than apples because grapes are sweeter. Please answer

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.