Foundations of Chemistry Test Review

The formula 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

Tags

NGSS.MS-PS1-1

Which is an example of an element?

• air

• water

• sodium

• sugar

Which property explains why copper is often used in electrical wiring?

• conductivity

• density

• magnetism

• solubility

A substance with a mass of 4.90 grams and a volume of 3.10 cubic centimeters would have what density?

• 1.58 g/cm³

• 0.32 g/cm³

• 1.52 g/cm³

• 1.62 g/cm³

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

Tags

NGSS.HS-PS1-5

Which physical change occurs when a gas changes into a solid?

• condensation

• deposition

• evaporation

• sublimation

Tags

NGSS.MS-PS1-4

Which is a size-dependent property?

• boiling point

• conductivity

• density

• mass

Why is the following chemical equation said to be balanced?

O₂ + 2PCl₃ --> 2POCl₃

• 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

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The elements sodium (Na) and chlorine (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 of NaCl are different from the properties of Na and Cl

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

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