Honors Physical Science

The chemical formula for table sugar is C12H22O11. How many oxygen atoms are in each sugar molecule?

11

Lead has a density of 11.4g/cm3. What is the volume of a block of lead with a mass of 282.5g?

25cm3

A substance has a mass of 360g and a volume of 7.5cm3. What is its density?

48g/cm3

A solution that is mildly acidic would have a pH of approximately

6

The chemical symbol acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?

7

What is a salt?

An ionic compound that does not contain oxide or hydroxide anions

Which statement about solutions is incorrect?

Liquids that mix to form a single layer are said to be miscible.

What happens when a supersaturated solution cools down?

The solute will precipitate put of the solution

You burn a log of wood and only a small pile of ashes is left. What has happened?

The total mass of the wood and oxygen is the same as the total mass of the ash and gases.

When water is broken down, what happens to the oxygen and hydrogen atoms it is made of?

They are rearranged to form hydrogen and oxygen gas

Which of the following is an example of a gas-liquid mixture?

a carbonated drink

Loose sugar dissolves much faster than a sugar cube because loose sugar has

a greater surface area.

You put one gram of salt into 1 liter of water and stir. The resulting liquid is an example of

a homogeneous mixture

The smallest unit of a substance that behaves like the substance is

a molecule

A material that can be represented by a chemical formula is

a pure substance.

A mixture that separates into different layers when you stop stirring it is

a suspension

All of the following will make it easier to dissolve a solute in a solvent except

adding a larger amount of solute

Which statement about bases is incorrrect

all bases contain hydroxide

Sugar will dissolve more quickly in iced tea if you stir it because stirring

allows dissolved molecules to diffuse through the tea

When a solution of an acid reacts with a solution of a base, the pH of the resulting solution depends on the

amounts of acid and base used.

A substance that cannot be broken down into simpler substances is

an atom

Soap can remove grease and oil from your skin because it acts as

an emulsifier to surround the oil.

The particles in a colloid remain dispersed throughout the mixture because they

are extremely small

Which of the following the chemicals is a base?

baking soda.

A liquid changes rapidly into a gas at the liquid's

boiling point

Which of the following is not an example of a physical property?

boiling point

The tendency of a less dense substance to float in a more dense liquid is called

buoyancy

An unsaturated solution is one that

can dissolve more solute at the current conditions

Digesting food is an example of

chemical change

The science of what matter is made out of and how it changes is called

chemistry

When dissolved in water, all acids will

conduct electricty

During a chemical or physical change, energy may be

converted into another form

The law of conservation of mass states that mass cannot be

created nor destroyed

Distillation can be used to separate solutions of miscible liquids because

different liquids usually have different boiling points.

Which of the following is an example of a physical change?

dissolving salt in water

You can usually filter out solid particles in a suspension by

distilling the entire suspension.

All changes of the state of matter require

energy

The ability to change or to move matter is referred to as

energy

Acids are substances that

form hydronium ions when dissolved in water

Solubility refers to the

grams of solute per 100g of solvent

Matter is defined as anything that

has mass and takes up space

You can make solute dissolve more quickly in a solvent by

heating the solvent

Which of the following is a basic solution?

household ammonia

The pH of a substance is a measure of its

hydronium

The element that is most abundant in earth is

iron

Water can dissolve charged particles because

it is solid at at temperature of 0 degrees celsius.

Ice floats in water because it is

less dense than water

You can skim the fat off the top of a kettle of cold soup because fat is

less dense than water and rises to the top.

Evaporation refers to the change of state from a

liquid to a gas

Water is referred to as the universal solvent because

many different substances dissolve in water

Which of the following is an example of a heterogeneous mixture?

mayonnaise

The chemical element that is most abundant in the human body is

oxyegen

Which of the following is an example of a chemical change?

paint fading

The kinetic theory states that the higher temperature, the faster the

particles that make up a substance move.

Grinding quartz crystals down to produce sand is an example of a

physical change

Knowing the chemical properties of a substance will tell you how the substance

reacts with other substances

Which of the following is not a homogeneous mixture?

rubbing alcohol

The kinetic theory is useful for

showing the differences between states of matter.

Which state of matter will hold its shape without a container?

solid

The label on a bottle indicates that the substance inside has a pH of 13. This tells you that the substance is

stongly basic

The change of a substance from a solid directly to a gas is called

sublimation

Marinades for meat commonly include acids, such as vinegar or wine, because the acids can

tenderize meat

A heterogeneous mixture is one that is not

uniform throughout

The resistance of a fluid to flow is referred to as

viscosity

When a solution of an acid reacts with a solution of a base, hydronium ions react with hydroxide ions to form

water