Unit 7 Review

The diagram below represents a graduated cylinder containing water before and after a rock suspended on a string is lowered into it. What is the approximate volume of the rock suspended in the graduated cylinder?

• 50 mL

• 100 mL

• 250 mL

• 300 mL

The graph below shows how water temperature affects the solubility of four different substances. The solubility of which substance is least affected by the temperature of the water?

• NaNO₃

• KNO₃

• NaCl

• SO₂

Which statement describes the components of a mixture?

• Each component gains new properties.

• Each component loses its original properties.

• The proportions of components can vary.

• The proportions of components cannot vary.

The diagram below shows two measuring containers, A and B. Container A contains 10 milliliters (mL) of a liquid. All of the liquid from container A is poured into container B. Choose the container that shows the correct amount of water after it has been poured from container A.

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• 
• 
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The diagram below shows a solid glass marble and a cup with water in it. When the marble is placed into the cup of water, the marble will most likely

• float

• sink

• change color

• get smaller

The diagram below represents the mass and volume of a mineral sample being measured. These measurements were used to determine the density of the mineral sample. What is the density of this mineral sample?

• 6 g/mL

• 24 g/mL

• 34 g/mL

• 60 g/mL

How much water should be added to the graduated cylinder shown below to increase the volume to 15 milliliters?

• 11 mL

• 10 mL

• 3 mL

• 4 mL

Mrs. Azzaretto poured 35 mL of water into a graduated cylinder. She dropped a shell into the cylinder, and the water level rose to 55 mL. What is the volume of the shell?

• 10 mL

• 15 mL

• 20 mL

• 25 mL

The graph below shows the solubility of several substances. Which compound is least soluble in water at 60.°C?

• KClO₃

• KNO₃

• NaCl

• NH₄Cl

A pebble has a mass of 35 grams and a volume of 14 cubic centimeters. What is its density?

• 0.4 g/cm³

• 2.5 g/cm³

• 490 g/cm³

• 4.0 g/cm³