Counting Atoms in Chemical Formulas

Front

What is a subscript in a chemical formula?

Back

A subscript is a number found on the lower right-hand side of an element symbol that indicates the number of atoms of that element in a molecule.

Front

How many atoms of Oxygen are in Al(OH)3?

Back

3

Front

How many different elements are present in H2COCH2?

Back

3

Front

What does the formula H2SO4 represent in terms of atoms?

Back

H = 2, S = 1, O = 4

Front

In the formula C3H5(NO3)3, how many Nitrogen atoms are there?

Back

3

Front

What is the purpose of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance in a chemical reaction.

Front

What is the total number of Hydrogen atoms in C3H5(NO3)3?

Back

5

Front

How do you determine the number of atoms of an element in a compound with parentheses?

Back

Multiply the subscript outside the parentheses by the subscripts of each element inside.

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 many Oxygen atoms are in the compound H2O?

Back

1