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
