Counting Atoms

Front

What is the chemical formula for water?

Back

H₂O

Front

How many atoms are in a molecule of glucose (C₆H₁₂O₆)?

Back

24 atoms (6 Carbon, 12 Hydrogen, 6 Oxygen)

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in one molecule.

Front

How many oxygen atoms are in 2H₂O?

Back

2 oxygen atoms.

Front

What is the total number of atoms in 3CO₂?

Back

9 atoms (3 Carbon, 6 Oxygen)

Front

How many nitrogen atoms are in 3(NH₄)₂SO₄?

Back

12 nitrogen atoms.

Front

What is the significance of coefficients in a chemical formula?

Back

Coefficients indicate the number of molecules or moles of a substance.

Front

How many hydrogen atoms are in 4NH₃?

Back

12 hydrogen atoms.

Front

What is the formula to calculate the total number of atoms in a compound?

Back

Add the number of atoms of each element, multiplied by their respective coefficients.

Front

How many aluminum atoms are in 5Al₂O₃?

Back

10 aluminum atoms.