Density and Percent Error

Quiz 1 Review

One & Two Step Equations, Percent Error, Density

​Percent Error

​% error = measured value - accepted value x 100

accepted value

​

​Measured value = "student determines," "student measures," experimental value

​

​Accepted value = "actual value"

​Density

​D = m

​ v

​

​D = density (g/mL) (g/cm³)

​m = mass (g)

​V = volume (mL, L, cm³)

Multiple Choice

What would be the best first step to solving the equation? -6x=-24

• multiply both sides by -6

• divide both sides by -6

• add 6  to both sides

• subtract -6  from both sides

Multiple Choice

What would be the best first step to solving the equation? -3=x+5

• add 3 to both sides

• subtract 5 from both sides

• add 5 to both sides

• subtract -5 from both sides

Multiple Choice

Solve 2x - 3 = 1

• 3

• 2

• 1

• -2

Multiple Choice

The students measured length during a science experiment, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?

• 15.79%

• 18.75%

• 2.25%

• 18%

Multiple Choice

Bob measures the boiling point of nitrogen to be 60 degrees. According to his reference table, the actual boiling point of nitrogen is 63 degrees. Find the percent error.

• 4.8%

• 33%

• 2.7%

• 3.7%

Multiple Choice

The density of liquid mercury is 1.25 g/mL. Charlotte measured a density of 1.75g/mL in lab. What is the percent error?

• 21%

• 17.37%

• 40%

• 21.02%

Multiple Choice

What is the formula for density?

• density = mass x volume

• density = mass / volume

• density = mass + volume

• density = mass - volume

Multiple Choice

Frank has a liquid. It has a mass of 6 g and a volume of 9 mL. What is its density?

• 3 g/mL

• .66 g/mL

• 1.33 g/mL

• 54 g/mL

Multiple Choice

What units are used to measure mass?

• g

• cm³

• g/cm³

• cm³/g

Multiple Choice

Which units of measurement are used for volume?

• grams

• centimeters

• grams/milliliter

• milliliter

Multiple Choice

What is the density of a liquid that has a mass of 27g and a volume of 30ml?

• 0.9 g/ml

• 3 g/ml

• 57 g/ml

• 810 g/ml