Pure Substances and Mixtures

Front

Which substance can be identified as a homogeneous mixture? Options: salt water, salad, chocolate chip cookie, peanut butter sandwich

Back

salt water

Front

Which picture represents a 2D model of a mixture of two elements? Options: A, B, C, D, E

Back

E

Front

Which picture represents a 2D model of a mixture of two compounds? Options: A, B, C, D, E

Back

A

Front

What question is best asked in the design of the experiment to determine how to separate the components of a solid dissolved in a liquid?

Back

Will the solvent evaporate at a different temperature than the solute in a distillation procedure?

Front

Hydrogen and oxygen combine to form water. Which statement best represents the formation of water?

Back

A pure substance has formed from the hydrogen and oxygen chemically combining.

Front

Which of the four substances is a compound?

• chlorine
• nitrogen
• sodium
• water

Back

water

Front

How does a compound differ from a mixture?

Back

Each substance in a compound loses its characteristic properties.

Front

Which of the following sentences best describes table salt, NaCl?

• Table salt is a compound made from two elements.
• Table salt is a mixture made from two elements.
• Table salt is an element made from two mixtures.
• Table salt is an alloy made from a metal and a nonmetal.

Back

Table salt is a compound made from two elements.

Front

When elements form mixtures,

Back

the elements keep their original properties.

Front

Which models represent mixtures? Options: Model A & Model B, Model A & Model D, Model B & Model C, Model C & Model D

Back

Model A & Model D