Which statements correctly describe compounds? check all that apply.
1. compounds can be broken down into simpler substances by chemical means.
2. each compound is composed of one type of molecule.
3. compounds can be broken down into simpler substances by physical means.
4. each compound is composed of one type of atom.
5. each compound is composed of two or more types of atoms.
6. compounds cannot be broken down into simpler substances by chemical means.

Is this a single replacement reaction or there is no

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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.