How many molecules are in 2h2o2
The Correct answer and Explanation is:
To determine the number of molecules in 2 moles of hydrogen peroxide (H₂O₂), we can use Avogadro’s number, which states that one mole of any substance contains approximately 6.022×10236.022 \times 10^{23}6.022×1023 molecules.
Calculation:
- Identify the number of moles: We have 2 moles of H₂O₂.
- Use Avogadro’s number: Number of molecules=Number of moles×Avogadro’s number\text{Number of molecules} = \text{Number of moles} \times \text{Avogadro’s number}Number of molecules=Number of moles×Avogadro’s number Number of molecules=2 moles×6.022×1023 molecules/mole\text{Number of molecules} = 2 \, \text{moles} \times 6.022 \times 10^{23} \, \text{molecules/mole}Number of molecules=2moles×6.022×1023molecules/mole Number of molecules=1.2044×1024 molecules\text{Number of molecules} = 1.2044 \times 10^{24} \, \text{molecules}Number of molecules=1.2044×1024molecules
Explanation:
Hydrogen Peroxide (H₂O₂): Hydrogen peroxide is a chemical compound commonly used for its oxidizing properties and as a disinfectant. Each molecule of hydrogen peroxide consists of two hydrogen atoms and two oxygen atoms, represented by the chemical formula H₂O₂.
Mole Concept: The mole is a fundamental concept in chemistry used to express amounts of a chemical substance. One mole corresponds to a specific number of molecules, and this number is defined by Avogadro’s number, 6.022×10236.022 \times 10^{23}6.022×1023. This value allows chemists to count particles in a convenient way, as it is often impractical to count individual molecules.
Application: Knowing how to calculate the number of molecules is essential in stoichiometry, which involves the quantitative relationships between reactants and products in chemical reactions. For example, in a reaction involving hydrogen peroxide, understanding how many molecules are present helps in determining the required amounts of reactants and predicting the amount of products formed.
In summary, 2 moles of H₂O₂ contain approximately 1.2044×10241.2044 \times 10^{24}1.2044×1024 molecules, illustrating the usefulness of Avogadro’s number in converting between moles and individual molecules in chemistry.