The molar mass and molecular weight of Carbon dioxide (CO2) is 44.0098 g/mol.
The composition of the CO2 formula is as follows:
| Element | Symbol | Atomic Weight | Atoms | Total Atomic Weight | Mass Percent |
|---|---|---|---|---|---|
| Oxygen | O | 15.9994 g/mol | 2 | 31.9988 g/mol | 72.7084% |
| Carbon | C | 12.011 g/mol | 1 | 12.0110 g/mol | 27.2916% |
How to find the molar mass of Carbon dioxide (CO2)?
The molar mass and molecular weight of Carbon dioxide (CO2) can be calculated in 4 steps.
Step I: Identify the different elemental atoms present in the CO2 compound.
The given compound is CO2. It comprises atoms from 2 different elements i.e., Oxygen (O) and Carbon (C).
Step II: Find the atomic weight of each element in the CO2.
Here is the list of atomic weights for all elements, let’s check the Oxygen (O) and Carbon (C) atom’s atomic weight.
• The atomic weight of Oxygen (O) is 15.9994 g/mol.
• The atomic weight of Carbon (C) is 12.011 g/mol.
Step III: Determine the number of atoms of each element present in the CO2 compound.
As per the chemical formula, CO2, It is made up of 2 Oxygen atoms and 1 Carbon atom.
| Element | Number of Atoms |
|---|---|
| O (Oxygen) | 2 |
| C (Carbon) | 1 |
Step IV: Calculate the molar mass of the Carbon dioxide (CO2) compound by applying the formula:
For Carbon dioxide (CO2):
Substituting into the above formula, the values determined in steps II and III:
Molar mass of CO2 = [(15.9994 x 2) + (12.011 x 1)]
Molar mass of CO2 = 31.9988 + 12.011 = 44.0098 g/mol
Result: The molecular weight and molar mass of Carbon dioxide (CO2) is 44.0098 g/mol.
FAQs
What is the mass percent composition of Oxygen (O) in Carbon dioxide (CO2)? |
To find the mass percent of Oxygen in CO2, follow the steps given below:
∴ Mass of Oxygen in CO2 = 15.9994 x 2 = 31.9988 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Oxygen in CO2 = (Mass of Oxygen in CO2/Molar mass of CO2) × 100% Result: CO2 contains 72.71 % of Oxygen as per its chemical composition.
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What is the mass percent composition of Carbon (C) in Carbon dioxide (CO2)? |
To find the mass percent of Carbon in CO2, follow the steps given below:
∴ Mass of Carbon in CO2 = 12.011 x 1 = 12.0110 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Carbon in CO2 = (Mass of Carbon in CO2/Molar mass of CO2) × 100% Result: CO2 contains 27.29 % of Carbon as per its chemical composition.
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What is the atomic percentage composition of elements in Carbon dioxide (CO2)? |
| Atomic percentage composition formula (%) = Number of atoms of a particular element in a compound/Total number of atoms in that compound
For CO2: The atomic percentage composition of elements in the compound is: Atomic percentage of Oxygen (O) in CO2: Atomic percentage of Carbon (C) in CO2:
|
How many grams of Oxygen are present in 1 mole of CO2? |
| There are 2 O-atoms in a CO2 molecule. • Atomic weight of a O-atom = 15.9994 g/mol ∴ Total mass of Oxygen in 1 mole of CO2 = 2 x 15.9994 = 32.00 g. Therefore there are 32.00 grams of Oxygen in 1 mole of CO2. |
What is the mass of 3 mol of CO2? |
| The molecular mass of CO2 is 44.0098 g/mol. This means 44.0098 grams of CO2 are present per mole. Therefore, we can find the mass of CO2 in 3 moles as follows: ∴ Moles = Mass/Molar Mass ∴ Mass of CO2 = Moles x Molar mass ∴ Mass of CO2 = 3 x 44.0098 = 132.03 g Thus, the mass of 3 mol of CO2 is 132.03 g. |
If you have 24.8014 grams of CO2, how many moles do you have? |
| ∴ Moles = Mass/Molar mass ∴ Moles of CO2 = 24.8014/44.0098 = 0.5635 Thus, there are 0.5635 moles of CO2 in its 24.8014 grams. |
What is the mass in kg of 7.33 x 1025 molecules of CO2? |
| 1 mole of a substance contains Avogadro number of particles i.e., 6.02 x 1023. Therefore, the number of moles in 7.33 x 1025 molecules of CO2 are: ∴ Moles of CO2 = 7.33 x 1025/6.02 x 1023 = 121.8
Now that we have its number of moles, so, we can use the molar mass of CO2 (44.0098 g/mol) to find its mass as shown below. ∴ Mass of CO2 = Moles x Molar mass
∴ Mass of CO2 = 121.8 x 44.0098 = 5362.30 g
Converting mass from grams (g) to kilograms (kg) gives us: ∴ Mass of CO2 = 5362.30/1000 = 5.36 kg
The mass of 7.33 x 1025 molecules of CO2 is 5.36 kg.
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What is the molar mass and molecular weight of Carbon dioxide (CO2)? |
CO2 is composed of 2 Oxygen (O), and 1 Carbon (C) atom.
To find the molecular mass of CO2, one multiplies the atomic weight of each element by its number of atoms in the molecule and then sums the results. ∴ For CO2, it’s (2 x 15.9994) + (1 x 12.0110).
Therefore, the molar mass of Carbon dioxide (CO2) is 44.0098 g/mol.
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About the author
Vishal Goyal is the founder of Topblogtenz, a comprehensive resource for students seeking guidance and support in their chemistry studies. He holds a degree in B.Tech (Chemical Engineering) and has four years of experience as a chemistry tutor. The team at Topblogtenz includes experts like experienced researchers, professors, and educators, with the goal of making complex subjects like chemistry accessible and understandable for all. A passion for sharing knowledge and a love for chemistry and science drives the team behind the website. Let's connect through LinkedIn: https://www.linkedin.com/in/vishal-goyal-2926a122b/