Serveral students performed this experiment without paying adequate attention to the details of the procedure. briefly explain what effect each of the following procedural changes would have ont the size of the volume-to-temperature ratio calculated by the students.
a) one student failed to replenish the boiling water in the boiling-water bath as the flask was being heated. at the end of the 6 min of heating, the boiling water in the bath was only in contact with the lower portion of the flask.
b) following the proper heating of the flask in the boiling water, a student removed the flask from the boiling-water bath but only partially immersed the flask in the ice-water bath during the cooling period.
c) a student neglected to close the pinch clamp before removing the flask from the boiling-water bath and immersing it in the ice-water bath.
d) one student neglected to measure the volume of the flask before leaving the laboratory. because the procedure called for a 125-ml erlenmeyer flask, the student used 125 ml as the volume of the flask.
Answers: 3
Chemistry, 22.06.2019 13:00, nadikadiaz1
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.
Answers: 1
Chemistry, 22.06.2019 18:00, Jazmineboo7709
Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?
Answers: 2
Chemistry, 22.06.2019 19:30, simihehe
Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons
Answers: 2
Serveral students performed this experiment without paying adequate attention to the details of the...
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