QuestionMay 13, 2025

If I have 3 grams of hydrogen peroxide, H_(2)O_(2) how many moles of hydrogen peroxide are there?

If I have 3 grams of hydrogen peroxide, H_(2)O_(2) how many moles of hydrogen peroxide are there?
If I have 3 grams of hydrogen peroxide, H_(2)O_(2) how many moles of hydrogen peroxide are there?

Solution
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Answer

\frac{3}{34} moles of H_{2}O_{2} Explanation 1. Calculate the molar mass of H_{2}O_{2} The molar mass of a compound is calculated by summing the atomic masses of all atoms in the formula. For H_{2}O_{2}, there are 2 hydrogen atoms and 2 oxygen atoms. The atomic mass of hydrogen is approximately 1 g/mol, and the atomic mass of oxygen is approximately 16 g/mol. Therefore, the molar mass of H_{2}O_{2} is 2 \times 1 + 2 \times 16 = 34 g/mol. 2. Use the formula to find moles To find the number of moles, use the formula: \text{moles} = \frac{\text{mass}}{\text{molar mass}}. Here, the mass is 3 grams and the molar mass is 34 g/mol. Thus, the number of moles is \frac{3}{34}.

Explanation

1. Calculate the molar mass of $H_{2}O_{2}$<br /> The molar mass of a compound is calculated by summing the atomic masses of all atoms in the formula. For $H_{2}O_{2}$, there are 2 hydrogen atoms and 2 oxygen atoms. The atomic mass of hydrogen is approximately 1 g/mol, and the atomic mass of oxygen is approximately 16 g/mol. Therefore, the molar mass of $H_{2}O_{2}$ is $2 \times 1 + 2 \times 16 = 34$ g/mol.<br />2. Use the formula to find moles<br /> To find the number of moles, use the formula: $\text{moles} = \frac{\text{mass}}{\text{molar mass}}$. Here, the mass is 3 grams and the molar mass is 34 g/mol. Thus, the number of moles is $\frac{3}{34}$.
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