Checkpoint Review

Front

How many different elements are in the chemical equation?

Back

4

Front

Which substance listed in the chart is made up of the most atoms? Carbonic acid, Nitric acid, Phosphoric acid, Sulfuric acid

Back

Phosphoric acid

Front

How many atoms of each element are in one molecule of 2-heptanone (CH₃C₄H₈COCH₃)?

Back

7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom

Front

What does the following model represent?

Back

compounds

Front

Do substances 2, 5, and 6 represent elements?

Back

True

Front

Which process describes only a physical change?

Back

Water evaporating from salt water

Front

Which student is correct based on the test with red food coloring in water?

Back

Student 2, because no new substance was formed when there was a color change

Front

Which process describes only a physical change during digestion?

Back

Chewing in the mouth breaks food into small pieces.

Front

Why does sugar stop dissolving in water during Kyle's experiment?

Back

The solution has reached saturation or too concentrated.

Front

What is the solvent?

Back

Water