The molar mass and molecular weight of Formic acid (HCOOH) is 46.0257 g/mol.
The composition of the HCOOH formula is as follows:
| Element | Symbol | Atomic Weight | Atoms | Total Atomic Weight | Mass Percent |
|---|---|---|---|---|---|
| Hydrogen | H | 1.00797 g/mol | 2 | 2.0159 g/mol | 4.3800% |
| Oxygen | O | 15.9994 g/mol | 2 | 31.9988 g/mol | 69.5237% |
| Carbon | C | 12.011 g/mol | 1 | 12.0110 g/mol | 26.0963% |
How to find the molar mass of Formic acid (HCOOH)?
The molar mass and molecular weight of Formic acid (HCOOH) can be calculated in 4 steps.
Step I: Identify the different elemental atoms present in the HCOOH compound.
The given compound is HCOOH. It comprises atoms from 3 different elements i.e., Hydrogen (H), Oxygen (O) and Carbon (C).
Step II: Find the atomic weight of each element in the HCOOH.
Here is the list of atomic weights for all elements, let’s check the Hydrogen (H), Oxygen (O) and Carbon (C) atom’s atomic weight.
• The atomic weight of Hydrogen (H) is 1.00797 g/mol.
• 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 HCOOH compound.
As per the chemical formula, HCOOH, It is made up of 2 Hydrogen atoms, 2 Oxygen atoms and 1 Carbon atom.
| Element | Number of Atoms |
|---|---|
| H (Hydrogen) | 2 |
| O (Oxygen) | 2 |
| C (Carbon) | 1 |
Step IV: Calculate the molar mass of the Formic acid (HCOOH) compound by applying the formula:
For Formic acid (HCOOH):
Substituting into the above formula, the values determined in steps II and III:
Molar mass of HCOOH = [(1.00797 x 2) + (15.9994 x 2) + (12.011 x 1)]
Molar mass of HCOOH = 2.01594 + 31.9988 + 12.011 = 46.0257 g/mol
Result: The molecular weight and molar mass of Formic acid (HCOOH) is 46.0257 g/mol.
FAQs
What is the mass percent composition of Hydrogen (H) in Formic acid (HCOOH)? |
To find the mass percent of Hydrogen in HCOOH, follow the steps given below:
∴ Mass of Hydrogen in HCOOH = 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 HCOOH = (Mass of Hydrogen in HCOOH/Molar mass of HCOOH) × 100% Result: HCOOH contains 4.38 % of Hydrogen as per its chemical composition.
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What is the mass percent composition of Oxygen (O) in Formic acid (HCOOH)? |
To find the mass percent of Oxygen in HCOOH, follow the steps given below:
∴ Mass of Oxygen in HCOOH = 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 HCOOH = (Mass of Oxygen in HCOOH/Molar mass of HCOOH) × 100% Result: HCOOH contains 69.52 % of Oxygen as per its chemical composition.
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What is the mass percent composition of Carbon (C) in Formic acid (HCOOH)? |
To find the mass percent of Carbon in HCOOH, follow the steps given below:
∴ Mass of Carbon in HCOOH = 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 HCOOH = (Mass of Carbon in HCOOH/Molar mass of HCOOH) × 100% Result: HCOOH contains 26.10 % of Carbon as per its chemical composition.
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What is the atomic percentage composition of elements in Formic acid (HCOOH)? |
| Atomic percentage composition formula (%) = Number of atoms of a particular element in a compound/Total number of atoms in that compound
For HCOOH: The atomic percentage composition of elements in the compound is: Atomic percentage of Hydrogen (H) in HCOOH: Atomic percentage of Oxygen (O) in HCOOH: Atomic percentage of Carbon (C) in HCOOH:
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How many grams of Hydrogen are present in 1 mole of HCOOH? |
| There are 2 H-atoms in a HCOOH molecule. • Atomic weight of a H-atom = 1.00797 g/mol ∴ Total mass of Hydrogen in 1 mole of HCOOH = 2 x 1.00797 = 2.02 g. Therefore there are 2.02 grams of Hydrogen in 1 mole of HCOOH. |
What is the mass of 5 mol of HCOOH? |
| The molecular mass of HCOOH is 46.0257 g/mol. This means 46.0257 grams of HCOOH are present per mole. Therefore, we can find the mass of HCOOH in 5 moles as follows: ∴ Moles = Mass/Molar Mass ∴ Mass of HCOOH = Moles x Molar mass ∴ Mass of HCOOH = 5 x 46.0257 = 230.13 g Thus, the mass of 5 mol of HCOOH is 230.13 g. |
If you have 10.2131 grams of HCOOH, how many moles do you have? |
| ∴ Moles = Mass/Molar mass ∴ Moles of HCOOH = 10.2131/46.0257 = 0.2219 Thus, there are 0.2219 moles of HCOOH in its 10.2131 grams. |
What is the mass in kg of 7.67 x 1025 molecules of HCOOH? |
| 1 mole of a substance contains Avogadro number of particles i.e., 6.02 x 1023. Therefore, the number of moles in 7.67 x 1025 molecules of HCOOH are: ∴ Moles of HCOOH = 7.67 x 1025/6.02 x 1023 = 127.4
Now that we have its number of moles, so, we can use the molar mass of HCOOH (46.0257 g/mol) to find its mass as shown below. ∴ Mass of HCOOH = Moles x Molar mass
∴ Mass of HCOOH = 127.4 x 46.0257 = 5864.81 g
Converting mass from grams (g) to kilograms (kg) gives us: ∴ Mass of HCOOH = 5864.81/1000 = 5.86 kg
The mass of 7.67 x 1025 molecules of HCOOH is 5.86 kg.
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What is the molar mass and molecular weight of Formic acid (HCOOH)? |
HCOOH is composed of 2 Hydrogen (H), 2 Oxygen (O), and 1 Carbon (C) atom.
To find the molecular mass of HCOOH, one multiplies the atomic weight of each element by its number of atoms in the molecule and then sums the results. ∴ For HCOOH, it’s (2 x 1.0080) + (2 x 15.9994) + (1 x 12.0110).
Therefore, the molar mass of Formic acid (HCOOH) is 46.0257 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/