Asample of solid potassium chlorate is heated strongly for 30 minutes. the sample melts, and bubbles of gas escape during the heating. upon cooling the heated sample becomes solid. the solid is white in color before and after heating. a sample of unheated solid is dissolved in water and 10 drops of silver nitrate are added. nothing happens. a sample of the heated solid is also dissolved in water and treated with 10 drops of silver nitrate. the solution becomes very cloudy. what classification should be given to the change that occurs when potassium chlorate is heated? a) physical b) chemical c) can't be determined

The table lists pressure and volume values for a particular gas. which is the best estimate for the value of v at p = 7.0 × 103 pascals?

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.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.