Question

Calculate the mass in grams of CO2 are formed if

89.6 liters of CH4 are used up at S.T.P?
(Hint: At S.T.P., one mole of any gas occupies a
volume of 22.4 liters).

Answer 1

Mass = 176 g

Step-by-step explanation:

Given data:

Volume of CH₄ = 89.6 L

Mass of CO₂ formed = ?

Solution:

Chemical equation:

CH₄ + 2O₂ → CO₂ + 2H₂O

one mole of any gas at STP occupy 22.4 L volume.

number of moles of CH₄ that occupy 89.6 L = 89.6/22.4 = 4 mol

Now we will compare the moles of CH₄ and CO₂:

CH₄ : CO₂

1 : 1

4 : 4

Mass of CO₂:

Mass = number of moles × molar mass

Mass = 4 mol × 44 g/mol

Mass = 176 g