Matter Unit Review

An unusual metal substance was found at a crime scene and evaluated in the lab. The metal was found to have a density of somewhere between 6 and 8. These results were compared with known data in the bar graph shown below.

• Lead

• Water

• Mercury

• Iron

Tags

NGSS.MS-PS1-2

An unknown gas is colorless, odorless, and tasteless. The gas turns moist iron filings reddish-brown. It condenses to a liquid at -183⁰ C. Which fact is a chemical property of the gas?

• It condenses at -183 degrees

• It turns iron reddish-brown

• It is odorless

Using the picture provided, if the mass of the solid object is 43 g, what is the density of the solid object in g/mL?

• 430

• 4.3

• 0.23

Assuming water has a density of 1 g/mL, which of the following statements is true concerning this graph?

• Most metals sink in water

• Water has a density greater than Cu

• Titanium is the densest metal.

Tags

NGSS.MS-PS1-2

The densities of three immiscible liquid substances are as follows:

 

Substance X:  1.00 g/mL

Substance Y:  0.78 g/mL

Substance Z:  1.45 g/mL

 

The three liquids are poured slowly into a tall graduated cylinder and allowed to separate into three distinct layers. Which one of the following arrangements are in the correct order.

• 
• 
• 

Tags

NGSS.MS-PS1-2

If 40 g of lead has a dimension of 2cm X 3cm X 5 cm, what would be the density of lead?

An object has a mass of 21 g and a volume of 7 cm3. Which of the following is true about the object?

• The object will float in water

• The object will sink in water

• The object has the same density as water.

Sally places a piece of red and blue litmus paper in an unknown solution. She notices that the red litmus paper stays red and the blue litmus paper turns red. Which of the following statements is true of the unknown solution?

• The unknown solution must have a pH of 6.9-14

• The unknown solution contains a large concentration hydrogen ions

• The unknown solution contains a large concentration hydroxide ions

Which of the following household items most likely has a pH of less than 7? 

• Vinegar

• Ammonia

• Soap

Use the image below to help answer the question. HCl (an acid) is mixed with NaOH (a base) in a neutralization reaction. Which of the following statements is NOT true concerning the product of this reaction?

• Salt has been produced

• Hydrogen ions will be produced

• Water will be produced

• A gas will be produced