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WorksheetsUnit 2: Foundations of Chemistry Review
Total questions: 20
Worksheet time: 12mins
The formula for AgNO3 represents a compound made of which atoms?
1 Ag, 1 N, 1 O
1 Ag, 1 N, 3 O
1 Ag, 3 N, 3 O
3 Ag, 3 N, 3 O
Which is an example of an element?
air
water
sodium
sugar
Which property explains why copper often is used in electrical wiring?
conductivity
density
magnetism
solubility
The table shows densities for different substances. For which substance would a 4.90-g sample have a volume of 3.10cm3?
Substance 1
Substance 2
Substance 3
Substance 4
Which would decrease the rate of a chemical reaction?
increase in concentration
increase in temperature
decrease in surface area
increase in both surface area and concentration
Which physical change is represented by the diagram below?
condensation
deposition
evaporation
sublimation
Which chemical equation is unbalanced?
What is a size-dependent property?
boiling point
conductivity
Density
mass
Why is the following chemical equation said to be balanced?
There are more reactants than products.
There are more products than reactants.
The atoms are the same on both sides of the equation.
The coefficients are the same on both sides of the equation.
The elements sodium (Na) and (Cl) react and form the compound sodium chloride (NaCl). Which is true about the properties of these substances?
Na and Cl have the same properties.
NaCl has the properties of Na and Cl.
All the substances have the same properties.
The properties on NaCl are different from the properties of Na and Cl.
Which describes how mixtures differ from substances?
Mixtures are homogeneous.
Mixtures are liquids.
Mixtures can be separated physically.
Mixtures contain only one kind of atom.
Study the diagram representing elements, compounds, and mixtures. Choose the correct statement.
Y represents a compound and Z represent a mixture.
X represents an elements and W represents a mixture.
Y represents an element and W represents a mixture.
X represents an element and Z represents a mixture.
Which is a chemical property?
the ability to be compressed
the ability to be stretched into thin wire
the ability to melt a low temperature
the ability to react with oxygen
You drop a sugar cube into a cup or hot tea. What causes the sugar to disappear in the tea?
It breaks into elements.
It evaporates.
It melts.
It mixes evenly.
Which is an example of a substance?
air
lemonade
soil
water
Which observation is a sign of a chemical change?
bubbles escaping form a fizzy drink
iron filings sticking to a magnet
lights flashing from fireworks
water turning to ice in a freezer
The figure shows a model of atoms in a sample at room temperature. Which physical property does this sample have?
It can be poured.
It can expand to fill its container.
It cannot easily change shape.
It has a low boiling point.
Zinc, a solid metal, reacts, with a hydrochloric acid solution. Which will increase the reaction rate?
cutting the zinc into smaller pieces
decreasing the concentration of the acid
lowering the temperature of the zinc
pouring the acid into a larger container
Which what not be determined from a chemical equation?
chemical formula
product
conservation of mass
reaction rate
The mass of the two reactants in a chemical reaction are 5.0 grams and 150.0 grams. What will be the mass of the final solution?
5 g
145 g
150 g
155 g
