A sample of an ionic compound is dissolved in water and the water gets colder. What acts as the system? What acts as the surroundings? Does heat flow from the system to the surroundings or from the surroundings to the system? Is dissolving this salt endothermic or exothermic?
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Chemistry, 22.06.2019 00:00
How did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.
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Chemistry, 22.06.2019 07:20
Why does his teacher ask him to balance the equation by including the correct coefficient
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Chemistry, 22.06.2019 13:00
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.
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A sample of an ionic compound is dissolved in water and the water gets colder. What acts as the syst...
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