To determine the number of moles of CO2 present in a sample, you need to use the molar mass of carbon dioxide (CO2). The molar mass of CO2 is the sum of the atomic masses of carbon (C) and two oxygen (O) atoms.
Given: Atomic mass of C = 12 a.m.u Atomic mass of O = 16 a.m.u
To calculate the molar mass of CO2: Molar mass of CO2 = (Atomic mass of C) + 2 × (Atomic mass of O) = 12 + 2 × 16 = 12 + 32 = 44 g/mol
Now, you can use the molar mass to calculate the number of moles of CO2:
Number of moles = Mass of the sample / Molar mass
In this case, the mass of the sample is given as 110 g. Plugging in the values:
Number of moles = 110 g / 44 g/mol ≈ 2.5 moles
Therefore, there are approximately 2.5 moles of CO2 present in a 110g sample of carbon dioxide.