Compounds and Chemical Formulas

The chemical formula for sodium sulfate is Na₂SO₄. How many sulfur atoms are in the formula for sodium sulfate?

• 1

• 2

• 6

• 7

Tags

8.5D

Sodium sulfate is used in laundry detergent. It is a compound that contains 2 atoms of sodium, 1 atom of sulfur, and 4 atoms of oxygen. What is the correct chemical formula for sodium sulfate?

• NA₂SO₄

• Na₂S₂O₄

• Na₂SO₄

• Na₂SO₈

Tags

8.5D

The above diagram is a model of a molecule of methane.  What is the formula for methane? 

• CH₈

• C₈H₄

• CH₄

• C₈H₈

Tags

8.5D

A chemical formula represents the different

• substances in a mixture.

• properties of an element.

• parts that make up an atom.

• elements that make up compounds.

Tags

NGSS.MS-PS1-1

Identify the elements in this compound.

• Carbon, Helium, Oxygen

• Chromium, Hydrogen, Oxygen

• Calcium, Hydrogen, Oxygen

• Carbon, Hydrogen, Oxygen

Tags

NGSS.MS-PS1-1

How many of each atom are in the compound above?

• 1 magnesium atom, 2 iron atoms, and 4 oxygen atoms

• 3 magnesium atoms, 2 iron atoms, and 4 oxygen atoms

• 6 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

• 3 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

Tags

NGSS.MS-PS1-1

Match the following compounds

• NH₃

• sodium chloride (table salt)

• NaHCO₃

• calcium carbonate

• NaCl

• ammonia

• CaCO₃

• baking soda

Tags

NGSS.MS-PS1-1

In a compound of C₆H₁₂O₆, there are ​ (a)   carbon, ​ (b)   hydrogen, and ​ (c)   oxygen.

• 6

• 12

• 1

• 8

Tags

NGSS.MS-PS1-1

Which of the models best represents CaCO₃?

• 
• 
• 
• 

Tags

8.5D

How many elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Tags

8.5D