Percent Error

Question 1

Complete the sentence using the words accepted, rejected or experimental.

The true or correct value based on general agreement with a reliable reference is an ___

value.

Answer 1

accepted

Question 2

What is the percent error if the measured value is 30.0 g and the accepted value is 32.0 g?
a
6.67 percent

b
6.02 percent

c
6.25 percent

d
None of the above

Answer 2

6.25 percent

Question 3

The experimental yield of a compound is 30 g and the true yield is 40 g. What is the percentage error in calculating the yield?
a20 percent
b25 percent
c50 percent
d75 percent

Answer 3

25 percent

Question 4

The value which can be found in reference tables is called the:

Answer 4

accepted value

Question 5

The boiling point of ethanol is 78.40°C. A student conducts an experiment and finds a boiling point of 75.70°C. What is the student’s percent error?

Answer 5

3.44%

Question 6

The boiling point of ethanol is 78.40°C. A student conducts an experiment and finds a boiling point of 75.70°C. What was the percent error?

Answer 6

3.44, 3.444, 3.4, 3.4439, 3.44387, 3.443(any of these)

Question 7

Experimental value of acceleration due to gravity is found to be 9.842 m/s2. The accepted value of acceleration due to gravity is 9.81 m/s2. What is the percent error in calculation?

Answer 7

0.326%

Question 8

A student determines the volume of a cube to be 4.6 cm3. What is the percent error if the correct volume of the crystal is 4.3 cm3?

Round to the nearest tenths place.

Answer 8

6.9%

Question 9

An actual measurement of a sample is 3.5 m. The measured value is 2.5 m. What is the percent error in the measurement?

Answer 9

29 percent

Question 10

The weight of a table as measured by a student is 20 kg.The actual weight of the table is 23 kg. What is the percent error in the student’s measurement?

Answer 10

13%

Question 11

If the experimental value is higher than the accepted value, the percent error will be a negative number.

Answer 11

false

Question 12

The observed mass of the sun is 6.270×1026 g but the actual mass of sun is 5.97×1024 kg. The percent error in measurement is 4.78 %.

Answer 12

false

Question 13

If the accuracy of the measurement decreases, the percent error increases.

Answer 13

true

Question 14

The boiling point of ethanol is 78.40°C. A student conducts an experiment and finds a boiling point of 75.70°C. The 78.40°C is called the accepted value, while the 75.70°C is called the experimental value.

Answer 14

true

Question 15

The uncertainty and error in measurement of any object is indicated by reporting a percent error.

Answer 15

true

Question 16

In chemistry, percentage error is used in measuring the precision and accuracy of data obtained during an experiment.

Answer 16

true

Question 17

The measured mass of a sample is 6.00 g. The actual mass of the sample is known to be 6.20 g. Calculate the absolute error in the measurement.

Answer 17

0.20 g

Question 18

Percent error is a common way of determining the accuracy of a measured value.

Answer 18

true

Question 19

Percent error is a common way of evaluating the precision of a measured value.

Answer 19

false