Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system, based on the following descriptions:
a. surroundings get colder and the system decreases in volume.
b. surroundings get hotter and the system expands in volume.
c. surroundings get hotter and the system decreases in volume.
d. surroundings get hotter and the system does not change in volume.
e. also assume that the magnitude of the volume and temperature changes are similar among the reactions.

As you move from right to left on the periodic table the atomic radius fill in the blank

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?