Students investigated the balance of respiration and photosynethsis using an aquatic snail and some pondweed. The students set up four tubes, A, B, C, and D, as shown in the table below. The colour change in each tube, after 24 hours in the light is recorded. Explain why the indicator solution in Tube C turns yellow

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

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.

How many peaks will be present in a mass spectrum for brcl?