The molar mass and molecular weight of Perchloric acid (HClO4) is 100.4586 g/mol.
The composition of the HClO4 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 | 63.7055% |
| Chlorine | Cl | 35.453 g/mol | 1 | 35.4530 g/mol | 35.2912% |
| Hydrogen | H | 1.00797 g/mol | 1 | 1.0080 g/mol | 1.0034% |
How to find the molar mass of Perchloric acid (HClO4)?
The molar mass and molecular weight of Perchloric acid (HClO4) can be calculated in 4 steps.
Step I: Identify the different elemental atoms present in the HClO4 compound.
The given compound is HClO4. It comprises atoms from 3 different elements i.e., Oxygen (O), Chlorine (Cl) and Hydrogen (H).
Step II: Find the atomic weight of each element in the HClO4.
Here is the list of atomic weights for all elements, let’s check the Oxygen (O), Chlorine (Cl) and Hydrogen (H) atom’s atomic weight.
• The atomic weight of Oxygen (O) is 15.9994 g/mol.
• The atomic weight of Chlorine (Cl) is 35.453 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 HClO4 compound.
As per the chemical formula, HClO4, It is made up of 4 Oxygen atoms, 1 Chlorine atom and 1 Hydrogen atom.
| Element | Number of Atoms |
|---|---|
| O (Oxygen) | 4 |
| Cl (Chlorine) | 1 |
| H (Hydrogen) | 1 |
Step IV: Calculate the molar mass of the Perchloric acid (HClO4) compound by applying the formula:
For Perchloric acid (HClO4):
Substituting into the above formula, the values determined in steps II and III:
Molar mass of HClO4 = [(15.9994 x 4) + (35.453 x 1) + (1.00797 x 1)]
Molar mass of HClO4 = 63.9976 + 35.453 + 1.00797 = 100.4586 g/mol
Result: The molecular weight and molar mass of Perchloric acid (HClO4) is 100.4586 g/mol.
FAQs
What is the mass percent composition of Oxygen (O) in Perchloric acid (HClO4)? |
To find the mass percent of Oxygen in HClO4, follow the steps given below:
∴ Mass of Oxygen in HClO4 = 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 HClO4 = (Mass of Oxygen in HClO4/Molar mass of HClO4) × 100% Result: HClO4 contains 63.71 % of Oxygen as per its chemical composition.
|
What is the mass percent composition of Chlorine (Cl) in Perchloric acid (HClO4)? |
To find the mass percent of Chlorine in HClO4, follow the steps given below:
∴ Mass of Chlorine in HClO4 = 35.453 x 1 = 35.4530 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Chlorine in HClO4 = (Mass of Chlorine in HClO4/Molar mass of HClO4) × 100% Result: HClO4 contains 35.29 % of Chlorine as per its chemical composition.
|
What is the mass percent composition of Hydrogen (H) in Perchloric acid (HClO4)? |
To find the mass percent of Hydrogen in HClO4, follow the steps given below:
∴ Mass of Hydrogen in HClO4 = 1.00797 x 1 = 1.0080 g/mol. Mass Percent Composition (%) Formula = (Mass of Element in the Compound/Molar Mass of the Compound) x 100 ∴ Mass percent of Hydrogen in HClO4 = (Mass of Hydrogen in HClO4/Molar mass of HClO4) × 100% Result: HClO4 contains 1.00 % of Hydrogen as per its chemical composition.
|
What is the atomic percentage composition of elements in Perchloric acid (HClO4)? |
| Atomic percentage composition formula (%) = Number of atoms of a particular element in a compound/Total number of atoms in that compound
For HClO4: The atomic percentage composition of elements in the compound is: Atomic percentage of Oxygen (O) in HClO4: Atomic percentage of Chlorine (Cl) in HClO4: Atomic percentage of Hydrogen (H) in HClO4:
|
How many grams of Oxygen are present in 1 mole of HClO4? |
| There are 4 O-atoms in a HClO4 molecule. • Atomic weight of a O-atom = 15.9994 g/mol ∴ Total mass of Oxygen in 1 mole of HClO4 = 4 x 15.9994 = 64.00 g. Therefore there are 64.00 grams of Oxygen in 1 mole of HClO4. |
What is the mass of 6 mol of HClO4? |
| The molecular mass of HClO4 is 100.4586 g/mol. This means 100.4586 grams of HClO4 are present per mole. Therefore, we can find the mass of HClO4 in 6 moles as follows: ∴ Moles = Mass/Molar Mass ∴ Mass of HClO4 = Moles x Molar mass ∴ Mass of HClO4 = 6 x 100.4586 = 602.75 g Thus, the mass of 6 mol of HClO4 is 602.75 g. |
If you have 36.0911 grams of HClO4, how many moles do you have? |
| ∴ Moles = Mass/Molar mass ∴ Moles of HClO4 = 36.0911/100.4586 = 0.3593 Thus, there are 0.3593 moles of HClO4 in its 36.0911 grams. |
What is the mass in kg of 16.74 x 1025 molecules of HClO4? |
| 1 mole of a substance contains Avogadro number of particles i.e., 6.02 x 1023. Therefore, the number of moles in 16.74 x 1025 molecules of HClO4 are: ∴ Moles of HClO4 = 16.74 x 1025/6.02 x 1023 = 278.1
Now that we have its number of moles, so, we can use the molar mass of HClO4 (100.4586 g/mol) to find its mass as shown below. ∴ Mass of HClO4 = Moles x Molar mass
∴ Mass of HClO4 = 278.1 x 100.4586 = 27939.99 g
Converting mass from grams (g) to kilograms (kg) gives us: ∴ Mass of HClO4 = 27939.99/1000 = 27.94 kg
The mass of 16.74 x 1025 molecules of HClO4 is 27.94 kg.
|
What is the molar mass and molecular weight of Perchloric acid (HClO4)? |
HClO4 is composed of 4 Oxygen (O), 1 Chlorine (Cl), and 1 Hydrogen (H) atom.
To find the molecular mass of HClO4, one multiplies the atomic weight of each element by its number of atoms in the molecule and then sums the results. ∴ For HClO4, it’s (4 x 15.9994) + (1 x 35.4530) + (1 x 1.0080).
Therefore, the molar mass of Perchloric acid (HClO4) is 100.4586 g/mol.
|
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/