A chemist heats four samples of the same substance to the following temperatures: Sample 1 to 30°C; Sample 2 to 15°C; Sample 3 to 45°C; Sample 4 to 35°C. The molecules of which sample will have the greatest motion?
A. Sample 1
B. Sample 2
C. Sample 3
D. Sample 4

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2