Counting Atoms

Front

What is the definition of a coefficient in a chemical formula?

Back

A number placed in front of a chemical formula.

Front

How do you determine the total number of atoms in a chemical formula?

Back

Add the subscripts of all elements in the formula, considering coefficients.

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

How many atoms are in the compound H2O?

Back

3 (2 Hydrogen + 1 Oxygen).

Front

What is the total number of atoms in the compound C2H8O?

Back

11 (2 Carbon + 8 Hydrogen + 1 Oxygen).

Front

How many elements are present in the compound C2H8O?

Back

3 (Carbon, Hydrogen, Oxygen).

Front

What is the significance of parentheses in a chemical formula?

Back

They indicate that the subscript applies to all elements inside the parentheses.

Front

How many atoms of Carbon are in the compound C5H10?

Back

5.

Front

If a coefficient of 3 is placed in front of H2O, how many total Hydrogen atoms are there?

Back

6 (3 x 2 = 6).

Front

What is the total number of atoms in the compound H2SO4?

Back

7 (2 Hydrogen + 1 Sulfur + 4 Oxygen).