8.5 D Chemical Formulas POST Test

A student is using colored beads to make a model of aluminum sulfate,

atoms are represented by blue beads, sulfur atoms by yellow beads, and oxygen atoms by

green beads.

What combination of beads should the student use for the model?

• 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

Tags

NGSS.MS-PS1-1

Based on this information, which of these statements is NOT true?

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

  does.

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

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

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

  does.

Tags

NGSS.MS-PS1-1

Which substances have the same number of carbon atoms? Choose TWO correct answers.

• Substance 1

• Substance 2

• Substance 3

• Substance 4

Tags

NGSS.MS-PS1-1

How many total atoms are represented in the reactants of this equation?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-5

How many atoms of sodium are present?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

How many atoms of Sulfur?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

How many atoms of Oxygen?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

Which of the following accurately describes the number of aluminum and oxygen atoms in the formula

• 8 atoms of Aluminum and 12 atoms of Oxygen

• 2 atoms of Aluminum and 3 atoms of Oxygen

• 6 atoms of Aluminum and 7 atoms of Oxygen

• 8 atoms of Aluminum and 3 atoms of Oxygen

Tags

NGSS.MS-PS1-1

A chemical formula is provided above. How many atoms of Hydrogen (H) are

found in this substance?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

Equations representing four different chemical reactions are shown below. Which balanced

equation represents a reaction that involves 6 atoms of hydrogen?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5