) Indicate how each of the following errors would affect(increase, decrease, or no change) your calculated value for the molar volume of O2 at STP (assuming that you complete the expiriment otherwise correctly). In each case, explain your answer.

A. Your sample was not completely decomposed.
B. After you finish heating your sample and the system cooled to room temp., you closed the clamp on the tube D without re-equilizing the pressures inside and outside of the flask. the water in beaker E was 4 in. deep and the water in flask C was 2 in. deep.

With no diagram it is impossible to know what flask C, flask D, beaker E etc are.

A. If the sample of O2 was not completely decomposed, it means that there is still some O2 remaining in the reaction vessel. This would result in a decrease in the calculated value for the molar volume of O2 at STP. The reason is that the molar volume of O2 is calculated by measuring the volume of the gas produced when a known mass of reactant is completely decomposed. If the sample is not completely decomposed, the measured volume will include some unreacted O2, leading to an overestimation of the molar volume.

To get the correct value, it is important to ensure complete decomposition of the sample by providing sufficient time, heat, or any other necessary conditions for the reaction to go to completion.

B. When the clamp on tube D is closed without re-equilizing the pressures inside and outside of the flask, a difference in pressure is created between the inside and outside of the flask. This pressure difference will cause a change in the water levels in beaker E and flask C.

If the water levels are not equalized, it will impact the accuracy of the measurement because the pressure inside the flask will not be the same as the atmospheric pressure. This will lead to an incorrect calculation of the volume of gas produced.

To ensure an accurate measurement, it is crucial to allow the pressures inside and outside of the flask to equilibrate by adjusting the water levels in beaker E and flask C until they are the same. This ensures that the pressure inside the flask is equal to the atmospheric pressure, allowing for an accurate calculation of the molar volume of O2 at STP.