Balancing Chemical Equations

Balancing Chemical Equations

The Law of Conservation of Matter

The Law of Conservation of Matter

• You CANNOT create or destroy matter

• In any given experiment, the amount of matter will still the same.

• The amount of matter stays the same, even when matter changes form. 

• Also called the Law of Conservation of Mass

Multiple Choice

What is matter?

• anything that has mass and takes up space

• something important

• only things that are heavy.

Multiple Choice

What is matter?

• anything that has mass and takes up space

• something important

• only things that are heavy.

Multiple Choice

Which state of matter has particles that are the closest together?

• solid

• liquid

• gas

Multiple Choice

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Multiple Choice

An oreo cookie weighs 20 grams.  It gets crushed into crumbs for a recipe.  How much do its crumbs weigh?

• 15 grams
• 25 grams
• 20 grams

Multiple Choice

The Law of Conservation of matter states that the total amount of matter ______________ after it undergoes change.

• disappears
• stays the same
• weighs less
• explodes

How do we know in chemistry obeys the Law of conservation of Matter?

The Chemical equation will be balanced.

Multiple Choice

How many Hydrogen (H) atoms are in NH₃O5

• 3
• 4
• 5
• 1

Multiple Choice

Identify the reactant(s) and product(s) of the reaction.

• All three are reactants and none are products.
• Hydrogen and water are the reactants, and oxygen is the product.
• Water and oxygen are the reactants, and hydrogen is the product.
• Hydrogen and oxygen are the reactants, and water is the product.
  

Multiple Choice

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

• Products
• Coefficients
• Precipitates
• Reactants

Multiple Choice

CaCO₃ represents a chemical

• Symbol

• Formula

• Subscript

• Reaction

Multiple Choice

CaCO₃ represents a chemical

• Symbol

• Formula

• Subscript

• Reaction

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