How many numbers of oxygen molecules are present in 3 liters of CO2 at STP?
mols CO2 at STP = 3L/22.4 = ?
mols O2 molecules = same since there is 1 O2 in 1 CO2.
Then 1 mol contains 6.02E23 molecules.
Plz
To find out the number of oxygen molecules in 3 liters of CO2 at STP (Standard Temperature and Pressure), we need to use the ideal gas law and the molar mass of carbon dioxide (CO2).
First, let's calculate the number of moles of CO2 in 3 liters at STP using the ideal gas law:
PV = nRT
Where:
P = pressure (at STP, it is 1 atmosphere)
V = volume (3 liters)
n = number of moles of gas
R = ideal gas constant (0.0821 L.atm/mol.K)
T = temperature (at STP, it is 273.15 Kelvin)
Substituting the values into the equation:
(1 atm) (3 L) = n (0.0821 L.atm/mol.K) (273.15 K)
n = (1 atm x 3 L) / (0.0821 L.atm/mol.K x 273.15 K)
n ≈ 0.110 mol
Next, we need to determine the number of molecules in 0.110 moles of CO2. To do this, we can use Avogadro's number, which states that there are 6.022 × 10^23 molecules in one mole of a substance.
Number of molecules = (number of moles) x (Avogadro's number)
Number of molecules = 0.110 mol x 6.022 × 10^23 molecules/mol
Number of molecules ≈ 6.624 × 10^22 molecules
Therefore, there are approximately 6.624 × 10^22 oxygen molecules in 3 liters of CO2 at STP.