Calculate Density to Identify an Unknown Substance

An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?

• 9 g/mL

• 10.5 g/mL

• 6.5 g/mL

• 8 g/mL

Tags

NGSS.MS-PS1-2

An irregularly shaped rock was lowered into a graduated cylinder holding a volume of water equal to 50 ml. The height of the water rose to 75 ml. If the mass of the stone was 250 g, what was its density?

• 15 g/mL

• 5 g/mL

• 10 g/mL

• 20 g/mL

An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 200 ml. The height of the water rose to 280 ml. If the mass of the stone was 240 g, what was its density?

• 3 g/mL

• 4 g/mL

• 2 g/mL

• 5 g/mL

Tags

NGSS.MS-PS1-2

An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?

• 30g/mL

• 5g/mL

• 20g/mL

• 2.77g/mL

A 5.00 cm^3 metal block weighs 39.3g. Use the table to determine the identity of the block.

• Copper

• Gold

• Iron

• Zinc

Use the chart to answer the question. A meteorite lands in your backyard. You want to determine what metal is in the meteorite. Its mass is 364 g and its volume is 52 cm³. What metal makes up most of the meteorite?

Use the chart to answer the question. You are given a sample of an unknown metal. You determine its mass is 217 g and its volume is 24.21 cm³. Which metal were you given?

Match the unknown substances in the table with the correct elements according to their densities.

• Sulfur

• Substance 1

• Carbon

• Substance 3

• Phosphorus

• Substance 2

• Magnesium

• Substance 4

Tags

NGSS.MS-PS1-2

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

• Zinc

• Copper

• Tin

• Iron

Answer explanation

The calculated density of 7.8 g/cm³ closely matches the density of iron, which is approximately 7.87 g/cm³. The other substances listed have different densities, making iron the most likely candidate.

Tags

NGSS.MS-PS1-2

A metal cube has a side length of 3 cm and a mass of 81 g. What is the density of the metal?

• 3 g/cm^3

• 9 g/cm^3

• 27 g/cm^3

• 1 g/cm^3