Intro to Balancing Equations (2)

Front

What is the number before a chemical formula called?

Back

Coefficient

Front

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe?

Back

No

Front

How many Magnesium atoms are there in Mg3N2?

Back

3

Front

What is the mass of a boiled egg that was originally 55 grams?

Back

55 grams

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of an element in a molecule.

Front

What is the purpose of balancing chemical equations?

Back

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

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What does it mean if a chemical equation is balanced?

Back

The number of atoms for each element is equal on both sides of the equation.

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 in a molecule.

Front

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

Back

CH4 + 2O2 --> CO2 + 2H2O