In the following reaction, spectrophotometry can be used to determine the rate of reaction. Finish the statement: ' in the following reaction, as time (t) , the red color of solution since becomes . Br2(l) + HCOOH(aq) -->2H+(aq) + 2Br-(aq) + CO2(aq) increases, increases, Br2(l), Br-(aq)

increases, decreases, Br2(l), Br-(aq)

increases, decreases, Br2, Br-

decreases, increases, Br2(l), Br-(aq)

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

What must occur for air masses to form fronts

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line