A scientist stirred a substance into 100 g of water at three different temperatures until it stopped dissolving into the water. Examine the table of the scientist's recorded results. Trial 1 mass of substance Trial 2 mass of substance Trial 3 mass of substance 110 72 105 Room Temperature Cold 78 55 81 140 Hot 83 135 During which trial did the scientist most likely commit an error in the procedure? How do you know?​

What are the percent by mass of copper in penny lab

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released