Chemistry Quiz

Serotonin is a chemical substance that acts as a neurotransmitter. It helps relay messages to the brain. One molecule of serotonin is shown below: C₁₀H₁₂N₂O. How many TOTAL ATOMS are in one molecule of serotonin?

• 24

• 25

• 26

• 27

Tags

NGSS.MS-PS1-1

The chemical formula for sodium sulfate is shown below. Na₂SO₄. How many sulfur atoms are in this compound?

• 2

• 1

• 0

• 6

Tags

NGSS.MS-PS1-1

Which of the following accurately describes the number of total aluminum and total oxygen atoms in this compound?

4Al₂O₃

• 6 atoms of aluminum and 7 atoms of oxygen

• 2 atoms of aluminum and 3 atoms of oxygen

• 8 atoms of aluminum and 12 atoms of oxygen

• 8 atoms of aluminum and 3 atoms of oxygen

Tags

NGSS.MS-PS1-1

The chemical formula for the mineral dolomite is CaMg(CO₃)₂. How many atoms of carbon are present in dolomite?

• 2

• 3

• 6

• 8

Tags

NGSS.MS-PS1-1

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 are represented by yellow beads. Oxygen is represented by green beads. What combination of beads should the student use for the model?

• 6 blue, 3 yellow, 7 green

• 2 blue, 1 yellow, 8 green

• 6 blue, 3 yellow, 12 green

• 2 blue, 3 yellow, 12 green

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A student completes the following graphic in a science journal. Which statement correctly identifies location A in this graphic?

• Determines the number of molecules in a chemical formula

• Identifies the number of elements in a chemical formula

• Indicates that the coefficient and subscripts must be multiplied

• Determines the number of atoms of a specific element are in the formula

Tags

NGSS.MS-PS1-1

Four students were asked to write a chemical formula using the information provided. Which student formulated the correct chemical formula for this substance?

• Student A: So₂SO₄

• Student B: Na₂SO₄

• Student C: SoSO

Tags

NGSS.MS-PS1-1

Which description correctly identifies the substance below? 5Ca(OH)₂

• 5 atoms of calcium, 10 atoms of oxygen, and 2 atoms of hydrogen

• 8 total atoms

• 5 molecules, each containing 1 calcium atom, 2 oxygen atoms, and 2 hydrogen atoms

• 10 atoms of calcium, 2 atoms of oxygen, and 2 atoms of hydrogen

Tags

NGSS.MS-PS1-1

A chemical formula is presented below and represents 5 molecules of caffeine.

5C₈H₁₀N₄O₂

How many atoms of Nitrogen are in one molecule of caffeine?

• 20

• 9

• 8

• 4

Tags

NGSS.MS-PS1-1

The chemical equation for photosynthesis is shown below.

How many total oxygen atoms are on the product side?

• 12

• 4

• 36

• 18

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7