Chemical Formula Quiz

Strontium phosphate, Sr₃(PO₄)₂, is a crystalline substance used in medicine and industry. How many phosphorus, P, atoms are represented in the formula for Sr₃(PO₄)₂?

• 2

• 3

• 4

• 8

How many elements are present in the chemical formula MgO?

• 0

• 1

• 2

• 4

Which of these formulas contain equal numbers of nitrogen atoms?

• Formulas I and III

• Formulas I and IV

• Formulas II and III

• Formulas I, II, and V

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

• 1

• 2

• 6

• 7

Which substances have the same number of carbon atoms?

• Substances 1 and 2

• Substances 2, 3, and 4

• Substances 2 and 3

• Substances 1 and 3

Based on the information in the table, which of these statements is not true?

• A molecule of sorbitol contains three more oxygen atoms than a molecule of glutamine.

• A molecule of lactose contains twice as many atoms as a molecule of fructose.

• A molecule of fructose contains four more atoms than a molecule of glutamine.

• A molecule of lactose contains twice as many carbon atoms as a molecule of sorbitol.

A student is using colored beads to make a model of aluminum sulfate, Al₂(SO₄)₃. Aluminum atoms are represented by blue beads, sulfur atoms by yellow beads, and oxygen atoms by green beads. How many would you need of each bead to make a model of aluminum sulfate?

• 6 blue, 3 yellow, and 7 green

• 2 blue, 1 yellow, and 4 green

• 2 blue, 3 yellow, and 12 green

• 6 blue, 12 yellow, and 12 green

How many total atoms are in one molecule of serotonin (C₁₀H₁₂N₂O)?

• 24

• 25

• 26

• 27

How many atoms of oxygen are in a molecule of glucose (C₆H₁₂O₆)?

• 4

• 5

• 6

• 7