The molar mass and molecular weight of Methane (CH4) is 16.0429 g/mol.
The composition of the CH4 formula is as follows:
| Element | Symbol | Atomic Weight | Atoms | Total Atomic Weight | Mass Percent |
|---|---|---|---|---|---|
| Hydrogen | H | 1.00797 g/mol | 4 | 4.0319 g/mol | 25.1319% |
| Carbon | C | 12.011 g/mol | 1 | 12.0110 g/mol | 74.8681% |
How to find the molar mass of Methane (CH4)?
The molar mass and molecular weight of Methane (CH4) can be calculated in 4 steps.
Step I: Identify the different elemental atoms present in the CH4 compound.
The given compound is CH4. It comprises atoms from 2 different elements i.e., Hydrogen (H) and Carbon (C).
Step II: Find the atomic weight of each element in the CH4.
Here is the list of atomic weights for all elements, let’s check the Hydrogen (H) and Carbon (C) atom’s atomic weight.
• The atomic weight of Hydrogen (H) is 1.00797 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 CH4 compound.
As per the chemical formula, CH4, It is made up of 4 Hydrogen atoms and 1 Carbon atom.
| Element | Number of Atoms |
|---|---|
| H (Hydrogen) | 4 |
| C (Carbon) | 1 |
Step IV: Calculate the molar mass of the Methane (CH4) compound by applying the formula:
For Methane (CH4):
Substituting into the above formula, the values determined in steps II and III:
Molar mass of CH4 = [(1.00797 x 4) + (12.011 x 1)]
Molar mass of CH4 = 4.03188 + 12.011 = 16.0429 g/mol
Result: The molecular weight and molar mass of Methane (CH4) is 16.0429 g/mol.
FAQs
What is the mass percent composition of Hydrogen (H) in Methane (CH4)? |
To find the mass percent of Hydrogen in CH4, follow the steps given below:
∴ Mass of Hydrogen in CH4 = 1.00797 x 4 = 4.0319 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Hydrogen in CH4 = (Mass of Hydrogen in CH4/Molar mass of CH4) × 100% Result: CH4 contains 25.13 % of Hydrogen as per its chemical composition.
|
What is the mass percent composition of Carbon (C) in Methane (CH4)? |
To find the mass percent of Carbon in CH4, follow the steps given below:
∴ Mass of Carbon in CH4 = 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 CH4 = (Mass of Carbon in CH4/Molar mass of CH4) × 100% Result: CH4 contains 74.87 % of Carbon as per its chemical composition.
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What is the atomic percentage composition of elements in Methane (CH4)? |
| Atomic percentage composition formula (%) = Number of atoms of a particular element in a compound/Total number of atoms in that compound
For CH4: The atomic percentage composition of elements in the compound is: Atomic percentage of Hydrogen (H) in CH4: Atomic percentage of Carbon (C) in CH4:
|
How many grams of Hydrogen are present in 1 mole of CH4? |
| There are 4 H-atoms in a CH4 molecule. • Atomic weight of a H-atom = 1.00797 g/mol ∴ Total mass of Hydrogen in 1 mole of CH4 = 4 x 1.00797 = 4.03 g. Therefore there are 4.03 grams of Hydrogen in 1 mole of CH4. |
What is the mass of 5 mol of CH4? |
| The molecular mass of CH4 is 16.0429 g/mol. This means 16.0429 grams of CH4 are present per mole. Therefore, we can find the mass of CH4 in 5 moles as follows: ∴ Moles = Mass/Molar Mass ∴ Mass of CH4 = Moles x Molar mass ∴ Mass of CH4 = 5 x 16.0429 = 80.21 g Thus, the mass of 5 mol of CH4 is 80.21 g. |
If you have 4.2165 grams of CH4, how many moles do you have? |
| ∴ Moles = Mass/Molar mass ∴ Moles of CH4 = 4.2165/16.0429 = 0.2628 Thus, there are 0.2628 moles of CH4 in its 4.2165 grams. |
What is the mass in kg of 2.67 x 1025 molecules of CH4? |
| 1 mole of a substance contains Avogadro number of particles i.e., 6.02 x 1023. Therefore, the number of moles in 2.67 x 1025 molecules of CH4 are: ∴ Moles of CH4 = 2.67 x 1025/6.02 x 1023 = 44.4
Now that we have its number of moles, so, we can use the molar mass of CH4 (16.0429 g/mol) to find its mass as shown below. ∴ Mass of CH4 = Moles x Molar mass
∴ Mass of CH4 = 44.4 x 16.0429 = 712.55 g
Converting mass from grams (g) to kilograms (kg) gives us: ∴ Mass of CH4 = 712.55/1000 = 0.71 kg
The mass of 2.67 x 1025 molecules of CH4 is 0.71 kg.
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What is the molar mass and molecular weight of Methane (CH4)? |
CH4 is composed of 4 Hydrogen (H), and 1 Carbon (C) atom.
To find the molecular mass of CH4, one multiplies the atomic weight of each element by its number of atoms in the molecule and then sums the results. ∴ For CH4, it’s (4 x 1.0080) + (1 x 12.0110).
Therefore, the molar mass of Methane (CH4) is 16.0429 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/