Final answer:
There are approximately 0.213 moles of Uranium-235 in 50 grams, calculated by dividing the mass of uranium by its molar mass of 235.04 g/mol.
Step-by-step explanation:
To calculate how many moles of uranium are in 50 grams of uranium, you use the molar mass of the relevant isotope. Uranium-235 has a molar mass of approximately 235.04 g/mol. Therefore, to find the number of moles of uranium in 50 grams, you use the following formula:
Number of moles = mass (in grams) / molar mass (in g/mol).
For 50 grams of Uranium-235, it would be:
Number of moles = 50 g / 235.04 g/mol ≈ 0.213 mol.
Thus, there are approximately 0.213 moles of Uranium-235 in 50 grams.