Ch: 2 Measurements And Calculations Review Accuracy And Precision Question Preview (ID: 48068)


Accuracy And Precision Review Questions. TEACHERS: click here for quick copy question ID numbers.

A measurement that closely agrees with an accepted value is best described as
a) precise
b) reproducible
c) significant
d) accurate

A numerical result is said to have good precision if
a) it agrees closely with an accepted value
b) repeated measurements agree closely
c) it has a small number of significant figures
d) it is a large whole number

A chemist obtained the values 5.22 g, 5.23 g, and 5.22 g for the mass of a sample. Without knowing the true mass of the sample , it can be said that these values have
a) good precision
b) good accuracy
c) poor precision
d) poor accuracy

The measurement 0.035550 g rounded off to 3 significant figures would be
a) 0.04 g
b) 0.356 g
c) 0.0356 g
d) 0.0355 g

Which of these measurements has been expressed to 2 significant figures?
a) 0.0020 m
b) 0.0402 m
c) 30. 00 m
d) 402.10 mm

The number of significant figures in the measurement 2010. 00 is
a) 2
b) 3
c) 4
d) 6

Which measurement has only nonsignificant zeros?
a) 0.0045 s
b) 50.0 m/s
c) 50. g
d) 102 days

For numbers less than 0.1, such as 0.05, the zeros to the right of the decimal point but before the first nonzero digit
a) are significant
b) show the decimal place of the first significant digit
c) show that the zero on the left side of the decimal is not significant
d) show uncertainty

How many significant figures are in 0.00305 00
a) 8
b) 6
c) 5
d) 3

Round 504 567 895 light years to 3 significant figures.
a) 505 light years
b) 504 light years
c) 505 000 000. light years
d) 505 000 000 light years

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