The molar mass and molecular weight of Sulfuric acid (H2SO4) is 98.0735 g/mol.
The composition of the H2SO4 formula is as follows:
| Element | Symbol | Atomic Weight | Atoms | Total Atomic Weight | Mass Percent |
|---|---|---|---|---|---|
| Oxygen | O | 15.9994 g/mol | 4 | 63.9976 g/mol | 65.2547% |
| Sulfur | S | 32.06 g/mol | 1 | 32.0600 g/mol | 32.6898% |
| Hydrogen | H | 1.00797 g/mol | 2 | 2.0159 g/mol | 2.0555% |
How to find the molar mass of Sulfuric acid (H2SO4)?
The molar mass and molecular weight of Sulfuric acid (H2SO4) can be calculated in 4 steps.
Step I: Identify the different elemental atoms present in the H2SO4 compound.
The given compound is H2SO4. It comprises atoms from 3 different elements i.e., Oxygen (O), Sulfur (S), and Hydrogen (H).
Step II: Find the atomic weight of each element in the H2SO4.
Here is the list of atomic weights for all elements, let’s check the Oxygen (O), Sulfur (S) and Hydrogen (H) atom’s atomic weight.
• The atomic weight of Oxygen (O) is 15.9994 g/mol.
• The atomic weight of Sulfur (S) is 32.06 g/mol.
• The atomic weight of Hydrogen (H) is 1.00797 g/mol.
Step III: Determine the number of atoms of each element present in the H2SO4 compound.
As per the chemical formula, H2SO4, It is made up of 4 Oxygen atoms, 1 Sulfur atom and 2 Hydrogen atoms.
| Element | Number of Atoms |
|---|---|
| O (Oxygen) | 4 |
| S (Sulfur) | 1 |
| H (Hydrogen) | 2 |
Step IV: Calculate the molar mass of the Sulfuric acid (H2SO4) compound by applying the formula:
For Sulfuric acid (H2SO4):
Substituting into the above formula, the values determined in steps II and III:
Molar mass of H2SO4 = [(15.9994 x 4) + (32.06 x 1) + (1.00797 x 2)]
Molar mass of H2SO4 = 63.9976 + 32.06 + 2.0159 = 98.0735 g/mol
Result: The molecular weight and molar mass of Sulfuric acid (H2SO4) is 98.0735 g/mol.
FAQs
What is the mass percent composition of Oxygen (O) in Sulfuric acid (H2SO4)? |
To find the mass percent of Oxygen in H2SO4, follow the steps given below:
∴ Mass of Oxygen in H2SO4 = 15.9994 x 4 = 63.9976 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Oxygen in H2SO4 = (Mass of Oxygen in H2SO4/Molar mass of H2SO4) × 100% Result: H2SO4 contains 65.25 % of Oxygen as per its chemical composition.
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What is the mass percent composition of Sulfur (S) in Sulfuric acid (H2SO4)? |
To find the mass percent of Sulfur in H2SO4, follow the steps given below:
∴ Mass of Sulfur in H2SO4 = 32.06 x 1 = 32.0600 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Sulfur in H2SO4 = (Mass of Sulfur in H2SO4/Molar mass of H2SO4) × 100% Result: H2SO4 contains 32.69 % of Sulfur as per its chemical composition.
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What is the mass percent composition of Hydrogen (H) in Sulfuric acid (H2SO4)? |
To find the mass percent of Hydrogen in H2SO4, follow the steps given below:
∴ Mass of Hydrogen in H2SO4 = 1.00797 x 2 = 2.0159 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Hydrogen in H2SO4 = (Mass of Hydrogen in H2SO4/Molar mass of H2SO4) × 100% Result: H2SO4 contains 2.06 % of Hydrogen as per its chemical composition.
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What is the atomic percentage composition of elements in Sulfuric acid (H2SO4)? |
| Atomic percentage composition formula (%) = Number of atoms of a particular element in a compound/Total number of atoms in that compound
For H2SO4: The atomic percentage composition of elements in the compound is: Atomic percentage of Oxygen (O) in H2SO4: Atomic percentage of Sulfur (S) in H2SO4: Atomic percentage of Hydrogen (H) in H2SO4:
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How many grams of Oxygen are present in 1 mole of H2SO4? |
| There are 4 O-atoms in a H2SO4 molecule. • Atomic weight of a O-atom = 15.9994 g/mol ∴ Total mass of Oxygen in 1 mole of H2SO4 = 4 x 15.9994 = 64.00 g. Therefore there are 64.00 grams of Oxygen in 1 mole of H2SO4. |
What is the mass of 7 mol of H2SO4? |
| The molecular mass of H2SO4 is 98.0735 g/mol. This means 98.0735 grams of H2SO4 are present per mole. Therefore, we can find the mass of H2SO4 in 7 moles as follows: ∴ Moles = Mass/Molar Mass ∴ Mass of H2SO4 = Moles x Molar mass ∴ Mass of H2SO4 = 7 x 98.0735 = 686.51 g Thus, the mass of 7 mol of H2SO4 is 686.51 g. |
If you have 35.6141 grams of H2SO4, how many moles do you have? |
| ∴ Moles = Mass/Molar mass ∴ Moles of H2SO4 = 35.6141/98.0735 = 0.3631 Thus, there are 0.3631 moles of H2SO4 in its 35.6141 grams. |
What is the mass in kg of 16.35 x 1025 molecules of H2SO4? |
| 1 mole of a substance contains Avogadro number of particles i.e., 6.02 x 1023. Therefore, the number of moles in 16.35 x 1025 molecules of H2SO4 are: ∴ Moles of H2SO4 = 16.35 x 1025/6.02 x 1023 = 271.5
Now that we have its number of moles, so, we can use the molar mass of H2SO4 (98.0735 g/mol) to find its mass as shown below. ∴ Mass of H2SO4 = Moles x Molar mass
∴ Mass of H2SO4 = 271.5 x 98.0735 = 26629.07 g
Converting mass from grams (g) to kilograms (kg) gives us: ∴ Mass of H2SO4 = 26629.07/1000 = 26.63 kg
The mass of 16.35 x 1025 molecules of H2SO4 is 26.63 kg.
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What is the molar mass and molecular weight of Sulfuric acid (H2SO4)? |
H2SO4 is composed of 4 Oxygen (O), 1 Sulfur (S), and 2 Hydrogen (H) atoms.
To find the molecular mass of H2SO4, one multiplies the atomic weight of each element by its number of atoms in the molecule and then sums the results. ∴ For H2SO4, it’s (4 x 15.9994) + (1 x 32.0600) + (2 x 1.0080).
Therefore, the molar mass of Sulfuric acid (H2SO4) is 98.0735 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/