Balancing Chemical Equations

Which of the following equations is balanced?

• H₂ + O₂ → H₂O

• 2H₂ + O₂ → H₂O

• 2H₂ + O₂ → 2H₂O

• H₂ + O₂ → 2H₂O

Tags

NGSS.MS-PS1-5

Which of the following is the general form of a chemical equation?

• Reactants = Products

• Products → Reactants

• Reactants → Products

• Reactants + Products

All chemical equations must be balanced?

• True

• False

Tags

NGSS.MS-PS1-5

A chemical equation is balanced when the number of each type of ______ is the same on both sides of the equations.

• Molecule

• Atom

• Element

• Coefficient

Tags

NGSS.MS-PS1-5

Which of the following rules should you follow to balance chemical equations?

• Use the smallest possible subscripts

• Add coefficients as needed

• Change only the subscripts

• All of the above

Which coefficient placed before HCI will balance the following equation? Zn+HCl→ZnCl₂ + H₂

• 3

• 4

• 2

• None of the above

Tags

NGSS.MS-PS1-5

Is this equation balanced? 2 H₂ + O₂ → 2 H₂O

• True

• False

Tags

NGSS.MS-PS1-5

Which of the following equations is balanced?

• CH₄ + O₂ → CO₂ + 2H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• CH₄ + 2O₄ → CO + ₂HO

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Numbers called subscripts are used to balance chemical equations.

• True

• False

Tags

NGSS.MS-PS1-1

A chemical _____ is a written method of representing the changes that occur in a chemical reaction.

• sequence

• equation

• balance

• reaction