Density, Percent Error, Precision, and Accuracy

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in g/cm³ or g/mL.

Front

How do you calculate density?

Back

Density = Mass / Volume.

Front

What is the formula for percent error?

Back

Percent Error = |(Measured Value - Actual Value) / Actual Value| × 100%.

Front

If a crayon has a mass of 10g and a volume of 5mL, what is its density?

Back

2 g/mL.

Front

What is precision in measurements?

Back

Precision refers to the consistency of repeated measurements, regardless of their accuracy.

Front

What is accuracy in measurements?

Back

Accuracy refers to how close a measured value is to the actual (true) value.

Front

Calculate the percent error if the measured length is 12 cm and the actual length is 14.25 cm.

Back

15.79%.

Front

If a paper clip has a mass of 9g and a volume of 3cm³, what is its density?

Back

3 g/cm³.

Front

What is the significance of significant figures in calculations?

Back

Significant figures indicate the precision of a measurement and should be maintained in calculations.

Front

Calculate the mass of a substance with a volume of 35.0 cm³ and a density of 0.50 g/cm³.

Back

18 g.