Chemical formulas and equations

How many aluminum atoms are in Al₂O₃?

• 3

• 2

• 5

Tags

NGSS.MS-PS1-1

What is C₃H₈ 
(methane) made up of?

• 1 carbon & 1 hydrogen
• 3 carbons & 8 hydrogens
• 8 carbons & 3 hydrogen
• 11 carbons & 11 hydrogen

Tags

NGSS.MS-PS1-1

Challenge: How many sodium (Na) atoms are in 6Na₂Cl ?

• 6

• 12

• 2

• 1

Tags

NGSS.MS-PS1-1

Chemical formulas are used to represent _________________.

• reactions

• substances

• processes

• none of the above

Tags

NGSS.MS-PS1-5

Chemical equations are used to represent _________________.

• reactions

• substances

• processes

• none of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The materials we start with in a reaction are known as __________________.

• chemicals

• reactants

• products

• creations

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Products are found on the _______________ side of the arrow in a chemical equation.

• Right

• Left

Tags

NGSS.MS-PS1-5

What is the correct "inventory" for KClO₃

• K = 1 Cl = 3 O = 3

• K = 3 Cl = 3 O = 3

• K = 1 Cl = 1 O = 3

• K = 1 C = 1 l = 1 O = 3

Tags

NGSS.MS-PS1-1

Which of the following accurately describes the chemical formula of the molecule shown above?

• 3CH₈O

• C₃H₇O

• C₄H₈O₂

• C₃H₈O

Tags

NGSS.MS-PS1-1

Which of the following molecules has the formula CH₂O?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1