Counting Atoms in Chemical Formulas

Front

Calculate the number of Oxygen atoms in Al(OH)₃

Back

3

Front

How many different elements are present in the molecule 3 NH₄C₂H₃O₂?

Back

4

Front

H₂SO₄: How many atoms of each element?

Back

H = 2, S = 1, O = 4

Front

A ______ is a number written in front of a chemical formula.

Back

Coefficient

Front

C₃H₅(NO₃)₃: How many atoms of each element?

Back

C = 3, H = 5, N = 3, O = 9

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of a chemical symbol indicating the number of atoms of that element.

Front

What does a coefficient indicate in a chemical formula?

Back

The number of molecules or formula units of a substance.

Front

In the formula H₂O, how many hydrogen atoms are there?

Back

2

Front

In the formula C₆H₁₂O₆, how many total atoms are there?

Back

24 (6 C + 12 H + 6 O)

Front

What is the total number of atoms in 2 NaCl?

Back

4 (2 Na + 2 Cl)