Balancing Chemical Equations - Practice

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

Which of the following equations are correctly balanced? 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Back

This equation is correctly balanced.

Front

What is the little number after an element in a chemical equation called? Example: H₂

Back

Subscript

Front

What are the coefficients needed to balance the equation: C₆H₁₂O₆ + O₂ → CO₂ + H₂O?

Back

3, 1, 1, 3

Front

How many Mn atoms are found in the compound 3Cr(MnO₄)₆?

Back

18

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved.

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the same number of each type of atom appears on both sides of the equation, in accordance with the Law of Conservation of Mass.

Front

What does a balanced chemical equation represent?

Back

It represents a chemical reaction where the mass and number of atoms are conserved.

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms of an element in a molecule.

Front

How do you determine if a chemical equation is balanced?

Back

By counting the number of atoms of each element on both sides of the equation and ensuring they are equal.