5. a student graphs the data collected in the drop - volume determination done with a buret. all the points…

5. a student graphs the data collected in the drop - volume determination done with a buret. all the points except one fall on a straight line. the last point is significantly above the straight line on the graph. which of the following would account for this? a. the student miscounted the drops and actually delivered more drops than the number recorded in table 3.7 for that point. b. the student miscounted the drops and actually delivered fewer drops than the number recorded in table 3.7 for that point. c. the buret was misread at that point. the recorded value was less than the correct value. d. more than one response is correct. explain your answer: \n\n6. a student determines the density of an unknown liquid by weighing a sample of known volume. the reported density is found by the instructor to be significantly higher than it should be. which of the following experimental errors could account for this result? a. the pipet used was filled to a level above the calibration mark. b. the balance was read incorrectly, and the recorded sample mass was lower than the true sample mass. c. a part of the sample was spilled from the beaker before it was weighed. explain your answer: \n\n7. a student determines the density of a rubber stopper by putting it into a graduated cylinder of water as you did in part f. the stopper sinks to the bottom of the cylinder. the reported density of the stopper is 0.12 g/ml. this result a. might be correct. b. is probably correct. c. cannot possibly be correct. explain your answer:

5. a student graphs the data collected in the drop - volume determination done with a buret. all the points except one fall on a straight line. the last point is significantly above the straight line on the graph. which of the following would account for this? a. the student miscounted the drops and actually delivered more drops than the number recorded in table 3.7 for that point. b. the student miscounted the drops and actually delivered fewer drops than the number recorded in table 3.7 for that point. c. the buret was misread at that point. the recorded value was less than the correct value. d. more than one response is correct. explain your answer: \n\n6. a student determines the density of an unknown liquid by weighing a sample of known volume. the reported density is found by the instructor to be significantly higher than it should be. which of the following experimental errors could account for this result? a. the pipet used was filled to a level above the calibration mark. b. the balance was read incorrectly, and the recorded sample mass was lower than the true sample mass. c. a part of the sample was spilled from the beaker before it was weighed. explain your answer: \n\n7. a student determines the density of a rubber stopper by putting it into a graduated cylinder of water as you did in part f. the stopper sinks to the bottom of the cylinder. the reported density of the stopper is 0.12 g/ml. this result a. might be correct. b. is probably correct. c. cannot possibly be correct. explain your answer:

Answer

Brief Explanations:

Question 5:

If the student miscounted and delivered fewer drops than recorded, the volume - related value for that point would be lower than expected in the context of the other data points, causing it to be above the straight - line on the graph. If the buret was misread with the recorded value lower than the correct value, it would also lead to a situation where the point is above the line. So more than one response is correct.

Question 6:

Density is calculated as $\rho=\frac{m}{V}$. If the pipet was filled above the calibration mark, more liquid than the supposed volume was used, and when calculating density with the assumed volume, the density would be higher.

Question 7:

A rubber stopper that sinks in water has a density greater than the density of water ($1\ g/mL$). A reported density of $0.12\ g/mL$ cannot be correct as it is less than the density of water and the stopper sinks.

Answer:

Question 5:

d. More than one response is correct

Question 6:

a. The pipet used was filled to a level above the calibration mark

Question 7:

c. cannot possibly be correct