Question 1

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight is the force with which gravity pulls on that object.

Question 2

A scientist records the boiling point of a liquid as 78.2°C. How many significant figures are in this measurement?

Accepted Answer

Three

Question 3

Which SI prefix represents a factor of $10^{-9}$?

Accepted Answer

nano

Question 4

A student measures the mass of a tennis ball three times and gets values of 54.4 g, 54.5 g, and 54.3 g. The true mass is 54.441778 g. Which statement best describes the accuracy and precision of these measurements?

Accepted Answer

Good accuracy and good precision

Question 5

Which of the following is a derived SI unit?

Accepted Answer

Liter (L)

Question 6

What is the correct formula to convert Celsius temperature to Kelvin?

Accepted Answer

$K = ^\backslash text{^\backslash degree C} + 273.15$

Question 7

A sample has a mass of 250 g and a volume of 50.0 mL. What is its density?

Accepted Answer

$5.00 \ g/mL$

Question 8

Which step of the scientific method involves changing one variable at a time to test a hypothesis?

Accepted Answer

Experiment

Question 9

Which of the following numbers has four significant figures?

Accepted Answer

4.803 cm

Question 10

A measurement is recorded as 0.00661 g. How many significant figures does it have?

Accepted Answer

Three

Question 11

Which of the following is NOT a fundamental SI unit?

Accepted Answer

Liter (L)

Question 12

A car travels 278 miles using 1.70 gallons of gasoline. What is the fuel efficiency in miles per gallon, rounded to the correct number of significant figures?

Accepted Answer

$23.8 \ mi/gal$

Question 13

Which of the following is the correct conversion factor to convert inches to meters?

Accepted Answer

$\frac{1 \ m}{39.37 \ in.}$

Question 14

Which of the following statements about significant figures is TRUE?

Accepted Answer

Zeros at the end of a number and after the decimal point are always significant.

Question 15

Which of the following is the correct formula for kinetic energy?

Accepted Answer

$E_k = \frac{1}{2} m v^2$

Question 16

A temperature is measured as 25°C. What is this temperature in Kelvin?

Accepted Answer

$298.15 \ K$

Question 17

Which of the following is a correct statement about dimensional analysis?

Accepted Answer

It uses conversion factors to convert a quantity expressed in one unit to an equivalent quantity in a different unit.

Question 18

Which of the following is the correct formula to convert Fahrenheit to Celsius?

Accepted Answer

$^\backslash text{^\backslash degree C} = \frac{5}{9} (^\backslash text{^\backslash degree F} - 32)$

Question 19

Which of the following best describes a hypothesis in the scientific method?

Accepted Answer

An explanation of observations

Question 20

A measurement is recorded as 55.220 K. How many significant figures does it have?

Accepted Answer

Five

Chemical Tools: Experimentation and Measurement – Study Notes

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