Calibrations and Precision

Practice Questions

GRE Subject Test: Chemistry › Calibrations and Precision

Questions
8
1

Which of these is an example of high accuracy?

2

A bowman is shooting arrows at a target. Which of the following demonstrates high accuracy but low precision?

3

An brand of fruit snacks claims that each bag of fruit snacks has a mass of . After weighing three bags, Wally observes the masses to be , , and .

How can Wally describe the accuracy and precision of the first bag he measured?

4

What is the molar concentration of a 2% by mass solution with a density of ?

5

Which of these is an example of high precision?

6

Michael buys several bags of balloons. On the package, it says that each bag has 100 balloons. He opens the bags and only one of them has 100 balloons inside; the other bags either have too many or too few.

How would you describe the bag of balloons with 100 balloons inside?

7

Michael's scale measures the mass of objects as consistently less than their actual mass. How would you describe the scale?

8

Screen shot 2015 10 25 at 4.34.12 pm

Using the calibration curve given, if given the absorbance of 1.51, what would be the concentration?

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