38. Given that a reaction absorbs energy and has an activation energy of 50 kJ/mol, which of the following statements are correct?
(1) The reverse reaction has an activation energy equal to 50 kJ/
mol.
(2) The reverse reaction has an activation energy less than 50 kJ/mol.
(3) The reverse reaction has an activation energy greater than 50 kJ/mol.
(4) The change in internal energy is less than zero.
(5) The change in internal energy is greater than zero.
a.
1&4
b. 2 & 4
c. 3&4
d. 2 & 5

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

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.