balancing equations

Front

What is a balanced chemical equation?

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 during a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed before compounds in a chemical equation to indicate the number of molecules or moles of that substance.

Front

How do you determine the number of atoms in a compound?

Back

To determine the number of atoms in a compound, multiply the subscript of each element by the coefficient in front of the compound.

Front

What is the first step in balancing a chemical equation?

Back

The first step in balancing a chemical equation is to write down the number of atoms of each element present in the reactants and products.

Front

What does it mean if an equation is already balanced?

Back

An equation is already balanced if the number of atoms of each element is the same on both sides of the equation without needing any coefficients.

Front

How do you balance the equation: _Zn + _HCl --> _ZnCl2 + _H2?

Back

The balanced equation is: 1Zn + 2HCl --> 1ZnCl2 + 1H2.

Front

What is the balanced equation for the combustion of propane (C3H8)?

Back

The balanced equation is: C3H8 + 5O2 --> 3CO2 + 4H2O.

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What is the significance of balancing chemical equations?

Back

Balancing chemical equations is significant because it ensures that the same amount of each element is present before and after a reaction, reflecting the conservation of mass.

Front

What is a skeleton equation?

Back

A skeleton equation is a chemical equation that shows the reactants and products but not the coefficients needed to balance it.