The no. of protons in 1 mole of H2:
Correct answer: B. 1.20 x 10^24
- A. 6.02 x 10^23
- B. 1.20 x 10^24
- C. 12.04 x 10^22
- D. 6.02 x 10^24
Explanation
The correct answer is 1.20 x 1024. A mole of any substance contains Avogadro's number (6.02 x 1023) of entities, in this case, H2 molecules. Since each H2 molecule consists of two hydrogen atoms, and each hydrogen atom has one proton, there are 2 protons per molecule. Therefore, the total number of protons in 1 mole of H2 is 2 x 6.02 x 1023, which equals 1.20 x 1024. Option A is incorrect because it represents the number of molecules, not protons. Option C is incorrect because it underestimates the number of protons, and Option D is incorrect because it overestimates the number of protons per molecule.
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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