chemistry test tomorow

Which statement describes a mixture of sand and water at room

temperature?

• It is heterogeneous, and its components are in the same

• It is heterogeneous, and its components are in different

  phase.

  phases.

• It is homogeneous, and its components are in the same

  phase.

• It is homogeneous, and its components are in different

  phases.

Which statement describes the components of a mixture?

• Each component gains new properties.

• Each component loses its original properties.

• The proportions of components can vary.

• The proportion of components cannot vary.

Which particle diagram represents a mixture of three substances?

• A

• B

• C

• D

Powdered sulfur is yellow, and powdered iron is gray. When

powdered sulfur and powdered iron are mixed at 20°C, the

powdered iron

• becomes yellow

• remains ionic

• becomes a liquid

• remains magnetic

Two grams of potassium chloride are completely dissolved in a

sample of water in a beaker. This solution is classified as

A) an

elementB) a compound

C) a homogeneous mixture

D) a heterogeneous mixture

• an element

• a compound

• a homogeneous mixture

• a heterogeneous mixture

which formula represents a mixture?

• C6H12O6(l)

• LiCl(aq)

• C6H12O6(s)

• LICI(s)

Which particle diagram represents a mixture of an element and a

compound?

• A

• B

• C

• D

.Bronze contains 90 to 95 percent copper and S to 10 percent tin.

as

Because these percentages can vary, bronze is classified

• a compound

• a mixture

• an element

• a substance

A mixture of crystals of salt and sugar is added to water and

stired until all solids have dissolved. Which statement best

describes the resulting mixture?

• The mixture is homogeneous and can be separated by

  filtration.

• The mixture is homogeneous and cannot be separated by

  filtration.

• The mixture is heterogeneous and can be separated by

  filtration

• The mixture is heterogeneous and cannot be separated by

  filtration.

Which of these terms refers to matter that could be

heterogeneous?

• element

• mixture

• compound

• solutiion