Based on the image above, which of the following is true? A. Mass was lost in this chemical reaction because the atoms in the reactants are smaller than the atoms in the products. B. Mass could have either been gained or lost during this chemical reaction because atoms always change mass when they react. C. Mass was gained in this chemical reaction because there are more atoms in the products than there were in the reactants. D. Mass was conserved in this chemical reaction because the same atoms are present in both the products and the reactants.

How many grams of n2h4 will be consumed by 23 g of n2o4

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

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.