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2g of Hydrogen atoms are excited to radi...

2g of Hydrogen atoms are excited to radiation. The study of spectra indicated `25%` of atoms are in `III^(rd)` energy level and `20%` atoms in `II^(nd)` energy level and rest in ground state. Calculate the total energy evolved when atoms return to ground state.

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To solve the problem, we need to calculate the total energy evolved when hydrogen atoms return to the ground state from the excited states. Here’s a step-by-step breakdown of the solution: ### Step 1: Determine the number of hydrogen atoms Given that we have 2 grams of hydrogen, we first need to find the number of moles of hydrogen atoms. - **Molar mass of hydrogen (H)** = 1 g/mol - **Number of moles of hydrogen** = mass (g) / molar mass (g/mol) = 2 g / 1 g/mol = 2 moles. ...
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