Chemical Equations

Why must we balance chemical equations? 

• Our teacher said so
• to abide by the law of conservation of energy
• to abide by the law of conservation of mass

Tags

NGSS.MS-PS1-5

 Fill in the blank to balance the chemical equation. 
2KI  +  ____Cl₂ →  2KCl  +  I₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

What coefficient should go in the blank space to balance the chemical equation? 
2Al  +____  HCl   →    2AlCl₃  +  3H2

• 2
• 4
• 3
• 6

Tags

NGSS.MS-PS1-5

Identify the number in blue.

• Product

• Reactant

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-1

How many atoms of nitrogen are in the compound shown above?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

What are the blue numbers called?

• oxidation numbers

• subscripts

• group numbers

• product numbers

Tags

NGSS.MS-PS1-1

What does the symbol inside the circle mean?

• "yields, or produces"

• "dissolved in water"

• "forms a precipitate"

• "released as a gas"

Tags

NGSS.MS-PS1-5

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

CaCO₃ represents a chemical

• Symbol
• Formula
• Subscript
• Reaction

Tags

NGSS.MS-PS1-1

The substances listed on the right side of a chemical equation are the

• Yields
• Reactants
• Products
• Precipitates

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5