# Calculate the volume and number of molecules in 8.8 g CO2.

August 18, 2021 | education

| Given:

m (CO2) = 8.8 g

To find:

V (CO2) -?

N (CO2) -?

Solution:

1) Find the molar mass of CO2 (it will be numerically equal to the molecular mass):

Mr (CO2) = Ar (C) + Ar (O) * 2 = 12 + 16 * 2 = 44 g / mol;

2) Find the amount of substance CO2:

n (CO2) = m (CO2) / Mr (CO2) = 8.8 / 44 = 0.2 mol;

3) Find the volume of CO2 gas:

V (CO2) = n (CO2) * Vm = 0.2 * 22.4 = 4.48 L;

4) Find the number of CO2 molecules:

N (CO2) = n (CO2) * NA = 0.2 * 6.02 * 10 ^ 23 = 1.2 * 10 ^ 23.

Answer: The volume of CO2 is 4.48 liters; the number of molecules is 1.2 * 10 ^ 23.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.