Calculate Density to Identify an Unknown Substance

If the volume is 5 mL, what is the density?

• 5

• 25

• 100

• 50

You calculated the density of an unknown substance to be 7.8g/cm³. According to the chart, which of the substances doe you most likely have?

• Zinc

• Copper

• Tin

• Iron

Tags

NGSS.MS-PS1-2

You calculated the density of an unknown substance to be 5.7g/cm³. According to the chart, which of the substances do you most likely have?

• Aluminum

• Iron

• Tin

• Zinc

Tags

NGSS.MS-PS1-2

During Mr. Nye's science class, students were expected to identify various substances using physical properties they could easily measure. Mr. Nye gave each of the five groups a green, metal cube and asked them to identify what the cube was made of. Matt's cube, after 5 trials, had an average density of 7.40 g/cm3 . His group's cube was made of

• aluminum

• gold

• nickel

• zinc

Tags

NGSS.MS-PS1-2

You calculated the density of an unknown substance to be 5.7 g/cm³. According to the chart, which of the substances do you most likely have?

• Aluminum

• Iron

• Tin

• Zinc

Answer explanation

The calculated density of 5.7 g/cm³ matches closely with the density of tin, which is approximately 7.3 g/cm³. The other options, aluminum, iron, and zinc, have densities that are significantly different.

Tags

NGSS.MS-PS1-2

What is the formula for calculating density?

If a substance has a mass of 200 grams and a volume of 50 cm³, what is its density?

• 4 g/cm³

• 0.25 g/cm³

• 5 g/cm³

• 2 g/cm³

Which of the following units is commonly used to express density?

• g/cm³

• m/s

• kg

• L

A block of metal has a density of 8 g/cm³. If the block is cut in half, what is the density of each half?

• 8 g/cm³

• 4 g/cm³

• 16 g/cm³

• Cannot be determined

Why is density an important property for identifying substances?

• It is unique to each substance and does not change with the amount.

• It changes with the amount of substance.

• It is the same for all substances.

• It is not a reliable property for identification.