The diagram below shows the temperature dropping from 80°C to 20°C.

Two containers each hold 4 balls. One container has balls with long arrows indicating movement and is labeled 80 degrees Celsius. The other has balls with short arrows and is labeled 20 degrees Celsius. An arrow points from the first to the second container.
Molecules that have longer arrows are moving faster. Which statement describes what is happening in this system?
Molecules vibrate more as temperature decreases.
Temperature is not related to the average kinetic energy of a system.
Kinetic energy decreases as temperature decreases.
There is no change in average kinetic energy between these two systems.

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.

Which statement best describes the he properties of iconic compounds ?

What is the chemical formula for the compound formed between sodium and flour one