Physical Science: Balancing Equations

Front

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

Back

Subscript

Front

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation) for H2 + S -> H2S?

Back

1,1 -> 1

Front

What can be placed to the left of a formula to make a chemical equation balanced?

Back

Coefficient

Front

What happens to the mass in a reaction between baking soda and phenol in a plastic bag?

Back

The mass stayed the same from the beginning to the end.

Front

Balance the chemical equation: __C2H6 + __O2 -> __CO2 + __H2O

Back

2,5 -> 4,6

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What does it mean to balance a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is the purpose of balancing chemical equations?

Back

To accurately represent the quantities of reactants and products in a reaction.