What is the molar mass of H2O2? Explain
The Correct Answer and Explanation is :
The molar mass of hydrogen peroxide (H₂O₂) can be calculated by adding the atomic masses of all the atoms in the molecule. Here’s how we break it down:
Step 1: Identify the elements in H₂O₂
Hydrogen peroxide consists of two elements:
- Hydrogen (H)
- Oxygen (O)
The chemical formula for hydrogen peroxide is H₂O₂, which indicates there are:
- 2 hydrogen atoms (H)
- 2 oxygen atoms (O)
Step 2: Find the atomic masses
Using the periodic table, the atomic masses are:
- Atomic mass of hydrogen (H) = 1.008 g/mol
- Atomic mass of oxygen (O) = 16.00 g/mol
Step 3: Calculate the molar mass
Now, to calculate the molar mass of H₂O₂, we sum the atomic masses of all the atoms present:
- Molar mass of hydrogen in H₂O₂ = 2 × 1.008 g/mol = 2.016 g/mol
- Molar mass of oxygen in H₂O₂ = 2 × 16.00 g/mol = 32.00 g/mol
Thus, the total molar mass of H₂O₂ is:
[
2.016 \, \text{g/mol} + 32.00 \, \text{g/mol} = 34.016 \, \text{g/mol}
]
Final Answer:
The molar mass of H₂O₂ is 34.016 g/mol.
Explanation:
The molar mass is an important concept in chemistry because it allows us to calculate how much of a substance (in grams) is needed to have a certain number of molecules or moles of that substance. In this case, knowing that the molar mass of H₂O₂ is 34.016 g/mol means that one mole of hydrogen peroxide weighs 34.016 grams. This is useful for conducting stoichiometric calculations, such as determining how much hydrogen peroxide is required to react in chemical processes or to prepare solutions of known concentrations.