Intro to Chemistry

This refers to how close a measured value is to an accepted value.

• accuracy

• error

• percent error

• precision

This refers to how close a set of measurements are to one another.

• accuracy

• error

• percent error

• precision

This is the difference between a measured value and an accepted value.

• accuracy

• error

• percent error

• precision

This is the ratio of error to an accepted value.

• accuracy

• error

• percent error

• precision

This is the value obtained by measurement or experiment.

• experimental value

• theoretical value

This is the accepted value or standard.

• experimental value

• theoretical value

The accepted boiling point of a substance is 90 degrees Celsius. During a lab a student records the boiling point at 91 degrees Celsius. What is the percent error?

• 90 degrees Cesius

• 91 degrees Celsius

• 1 degree Celsius

• 1.098%

Which is the correct formula for density?

• Density = mass + volume

• Density = mass - volume

• Density = mass x volume

• Density = mass / volume

The mass of an object is 10 grams and the volume is 5 mL. What is the density of the object?

• 15 g/mL

• 5 g/mL

• 50 g/mL

• 2 g/mL

An object is placed in a graduated cylinder and the water level rises from 50 mL to 60 mL. The mass of the object is 20 grams. What is the density of the object?

• 30 g/mL

• 10 g/mL

• 200 g/mL

• 2 g/mL