Chemical Equations

How many elements are in C₆H₁₂O₆?

• 6
• 12
• 3
• 24

The red numbers in the image below represent ________.

• subscripts
• coefficients
• I don't know.
• None of the answers are correct.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The blue numbers in the image below represent ________.

• I don't know.
• coefficients
• subscripts
• None of the answers are correct.

Which are the reactants in the following reaction?
2Mg + O₂ ---> 2MgO 

• Mg and O
• MgO
• Mg and MgO
• O and MgO

Tags

NGSS.MS-PS1-2

In a chemical reaction, everything to the right of the arrow are called ______________.

• products
• yields
• molecules
• reactants

Tags

NGSS.HS-PS1-7

Is the following equation balanced or unbalanced?
Fe + S --> FeS

• balanced
• unbalanced

Tags

NGSS.MS-PS1-5

How many oxygens are in Al₂(SO₄)₃?

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

How many hydrogens are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

Na₃PO₄ +  KOH ---> NaOH +  K₃PO₄

• 1 Na₃PO₄+3 KOH
  --->
  3 NaOH +  1 K₃PO₄
• 2 Na₃PO₄+2 KOH
  --->
  3 NaOH +  1 K₃PO₄
• 1 Na₃PO₄+2 KOH
  --->
  2 NaOH +  1 K₃PO₄
• 3 Na₃PO₄+3 KOH
  --->
  3 NaOH +  1 K₃PO₄

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

P₄ + O₂  --->  P₂O₃

• 3 P₄+1 O₂ ---> 2 P₂O₃
• 1 P₄+1 O₂ ---> 2 P₂O₃
• 1 P₄+ 3 O₂ ---> 2 P₂O₃
• 1 P₄+ 2 O₂ ---> 3 P₂O₃

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5