<u>Answer:</u> The correct answer is Option b.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
.....(1)
Given mass of oxygen = 8.94 g
Molar mass of oxygen = 32 g/mol
Putting values in above equation, we get:
The chemical equation for the combustion of methane is given as:
By Stoichiometry of the reaction:
2 moles of oxygen gas produces 1 mole of carbon dioxide.
So, 0.28 moles of oxygen gas will produce = of carbon dioxide gas.
Now, calculating the mass of carbon dioxide by using equation 1.
Moles of carbon dioxide = 0.14 moles
Molar mass of carbon dioxide = 44.01 g/mol
Putting values in equation 1, we get:
Hence, the correct answer is Option b.