Conservation Law of Mass(Balanced Equations)

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What is the Conservation Law of Mass?

Back

The Conservation Law of Mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

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What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

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What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a compound or element in a chemical equation to indicate how many molecules or moles are involved.

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How do you determine if a chemical equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation; if they are equal, the equation is balanced.

Front

What is the total mass of products in a reaction if 32 g of Oxygen reacts with 8 g of Hydrogen?

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The total mass of products is 40 g of Water, as mass is conserved.

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What is a subscript in a chemical formula?

Back

A subscript is a number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

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How many hydrogen atoms are in the molecule C2H6?

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There are 6 hydrogen atoms in the molecule C2H6.

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What is the product of the reaction between Hydrogen and Oxygen?

Back

The product of the reaction between Hydrogen and Oxygen is Water (H2O).

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What does it mean if a chemical equation is unbalanced?

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An unbalanced chemical equation has different numbers of atoms of one or more elements on each side, indicating that mass is not conserved.

Front

What is the balanced equation for the combustion of methane (CH4)?

Back

The balanced equation is CH4 + 2O2 -> CO2 + 2H2O.