Which of the following contains the maximum number of molecules?
A) 44 g of CO₂
B) 48 g of O₃
C) 8 g of H₂
D) 64 g of SO₂

To determine which of the given substances has the maximum number of molecules, you can use the concept of molar mass and Avogadro's number.

First, calculate the number of moles for each substance:

A) 44g CO2:
Molar mass of CO2 = 12.01 g/mol (C) + 16.00 g/mol (O) + 16.00 g/mol (O) = 44.01 g/mol
Number of moles = Mass / Molar mass = 44g / 44.01 g/mol ≈ 1 mole

B) 48g O3:
Molar mass of O3 = 16.00 g/mol (O) + 16.00 g/mol (O) + 16.00 g/mol (O) = 48.00 g/mol
Number of moles = Mass / Molar mass = 48g / 48.00 g/mol = 1 mole

C) 8g H2:
Molar mass of H2 = 1.01 g/mol (H) + 1.01 g/mol (H) = 2.02 g/mol
Number of moles = Mass / Molar mass = 8g / 2.02 g/mol ≈ 3.96 moles

D) 64g SO2:
Molar mass of SO2 = 32.07 g/mol (S) + 16.00 g/mol (O) + 16.00 g/mol (O) = 64.07 g/mol
Number of moles = Mass / Molar mass = 64g / 64.07 g/mol ≈ 1 mole

Now, compare the number of moles for each substance:

A) CO2: 1 mole
B) O3: 1 mole
C) H2: 3.96 moles
D) SO2: 1 mole

The substance with the maximum number of molecules will have the most moles. In this case, it's substance C) 8g H2, which has approximately 3.96 moles. Therefore, option C) 8g H2 has the maximum number of molecules among the given substances.