Which statement explains why br2 is a liquid at stp and i2 is a solid at stp? (1) molecules of br2 are polar, and molecules of i2 are nonpolar.
(2) molecules of i2 are polar, and molecules of br2 are nonpolar.
(3) molecules of br2 have stronger intermolecular forces than molecules of i2.
(4) molecules of i2 have stronger intermolecular forces than molecules of br2.

Compare and contrast the bohr model and the electron cloud models of the atom.

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

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.