Check all statements below that ar true.
heating air under the balloon will cause the
air inside to expand.
the air inside will have the same mass but
more volume.
heating the air under the balloon will cause
the entire balloon to rise.
the outside temperature will have no affect
on the height of the balloon.
the only way to make the balloon sink is to
let out the air.

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.

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

What is the name for molecular compound n4o8?