Define the Accuracy and Precision Three students (A, B and C) are asked to deter

Question

Define the Accuracy and Precision Three students (A, B and C) are asked to determine the volume of a sample of ethanol. Each student measures the volume three times with a graduated cylinder. The results in mL are -87.1, 88.2, 87.6 -86.9, 87.1, 87.2 -87.6, 87.8, 87.9 The true volume is 87.0 mL. Comment on the precision and the accuracy of each student's results Carry out the following operations and express each answer with the correct number of significant numbers 5.6792 m + 0.6m + 4.33 m 3.70 g - 2.9133 g

Explanation / Answer

V)

m = 37.2 g Pb

T = 20°C

62.7 g of Pb

find final mass = 37.2+62.7 = 99.9 g of led pellets

Tfinal = 20°C and 20°C makes no heat transfer, so final T = 20°C

Density of sample --> reains the same since it is the same material

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