Counting Atoms

Front

What is a coefficient in a chemical formula?

Back

A coefficient is a number placed in front of a chemical formula that indicates how many molecules or atoms of that substance are present.

Front

Identify the total number of atoms in the formula He₂Ag₃N₄O.

Back

10

Front

How many total atoms are in the formula 2H₂O?

Back

6

Front

What does the formula CO₂H₅ represent in terms of elements?

Back

It contains 3 different elements: Carbon (C), Oxygen (O), and Hydrogen (H).

Front

How many total atoms of Carbon (C) are in the formula 3C₂HAu₅?

Back

6

Front

What is the total number of elements in a chemical formula?

Back

The total number of different types of atoms present in the formula.

Front

What does the subscript in a chemical formula indicate?

Back

A subscript indicates the number of atoms of the element in the molecule.

Front

How do you calculate the total number of atoms in a compound?

Back

Add the number of atoms of each element, taking into account the coefficients and subscripts.

Front

What is the significance of the number in front of a chemical formula?

Back

It tells you how many molecules of that compound are present.

Front

In the formula 3BeH₅Si₈, what does the '3' represent?

Back

It represents 3 molecules of the compound BeH₅Si₈.