Properties of Matter Review 8.6 A,B,C,D,E

The drawing below shows the proper way to read a glass graduated cylinder. Why does the water not form a straight line across the surface?

• Attraction between the water and the glass causes adhesion of the water.

• Repulsion between the water and the glass causes adhesion of the water.

• Cohesion among water molecules causes them to move higher on the glass.

• Cohesion between the water and the glass causes some of the water molecules to rise.

Two solutions are mixed and react to produce AgCl. The chemical reaction is shown below by the balanced equation. AgNO₃ + LiCl → AgCl + LiNO₃ What happens to the total mass as the reaction takes place?

• The mass increases

• The mass decreases

• The mass remains constant

• The mass first increases and then decreases

Tags

NGSS.MS-PS1-5

A pool was tested using a pH strip as seen below. What is the current pH of the pool and what does this tell us?

• The pH level of the pool is at a 3. This means that the pool is currently acidic and needs to be chemically balanced to neutral before it is safe to swim.

• The pH level of the pool is at a 3. This means that the pool is currently basic and needs to be chemically balanced to neutral before it is safe to swim.

• The pH level of the pool is at a 5. This means that the pool is currently neutral and is perfectly safe.

• The pH level of the pool is at a 5. This means that the pool is currently acidic and needs to be chemically balanced to neutral before it is safe to swim.

Tags

NGSS.MS-PS1-2

What elements are involved in this chemical reaction? CaCO₃ → CaO + CO₂ There are more than one answer.

• Cobalt

• Calcium

• Oxygen

• Carbon

• Chlorine

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

In the chemical reaction, HCl (acid) + NaOH (base) → H₂O + NaCl, what elements are involved and what is produced by the reaction?

• Hydrogen, Chlorine, Sodium, Oxygen; Water and Sodium Chloride are produced.

• Carbon, Oxygen, Hydrogen; Carbon Dioxide and Water are produced.

• Nitrogen, Hydrogen, Oxygen; Ammonia and Water are produced.

• Sulfur, Oxygen, Hydrogen; Sulfuric Acid and Water are produced.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

As noted in the book, chlorine tablets are used in swimming pools to maintain the health of the water and the pH levels. The main reaction is: Cl₂ + H₂O → HOCl + HCl Which components are reacting as elements, compounds or mixtures? Click all that apply.

• Cl₂ is an element

• HCl is an element

• H₂O, HOCl and HCl are compounds

• HOCl and HCl combined are a mixture

• HOCl is a mixture

Droplets of water remain on the lower side of this leaf, even though gravity pulls the water downward. What property of water keeps the drops of water from falling to the ground?

• adhesion among water molecules in the droplet

• cohesion between water molecules and molecules of the leaf

• adhesion between water molecules and molecules of the leaf

• surface tension of the water droplet

Adhesion, cohesion, and surface tension are properties that are observed in water. What unique property of water molecules makes adhesion, cohesion, and surface tension possible, AND why are adhesion, cohesion, and surface tension observed in liquid water but not in ice?

• Hydrogen bonding; because in liquid water, molecules are closer and can form more hydrogen bonds.

• Covalent bonding; because in liquid water, molecules are further apart and can form fewer covalent bonds.

• Ionic bonding; because in liquid water, molecules are closer and can form more ionic bonds.

• Metallic bonding; because in liquid water, molecules are further apart and can form fewer metallic bonds.

A student used pH test strips to determine the pH of some common household items. She recorded them in the table below. Which items in the table are classified as acids?

• Egg Whites

• Hand Soap

• Coffee

• Lemon Juice

• Rain Water

Tags

NGSS.MS-PS1-2

In a lab demonstration, a teacher burned a strip of magnesium ribbon in a crucible that was inside a fume hood. The chemical equation for the reaction that occurred is: Mg(s) + O₂(g) → 2MgO(s) The masses of the reactants and products of the combustion reaction are shown in the table. Assuming that the combustion reaction was complete, what mass of oxygen reacted with the magnesium ribbon?

• Can not be determined

• 3.7 g

• 9.2 g

• 5.5 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5