Mrs. Smith wrote down a chemical equation on the board and stated that mass is conserved in the reaction. What did she mean? A. There are equal numbers of atoms on both the reactant side and the product sides.
B. The number of atoms on each side changes.
C. There are more atoms on the product side.
D, There are more atoms on the reaction side.

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.

What is true for a substance that releases energy