Final answer:
To find the number of moles of a 252 g iron sample, divide the mass by the molar mass of iron (55.85 g/mol) to get 4.51 moles.
Step-by-step explanation:
The question revolves around the concept of calculating the number of moles of a sample of iron. To calculate the number of moles of iron in a 252 g sample, we use the molar mass of iron, which is 55.85 g/mol according to the periodic table. The number of moles is calculated by dividing the mass of the sample by its molar mass.
Here's the calculation:
Number of moles = Mass of iron / Molar mass of iron
= 252 g / 55.85 g/mol
= 4.51 moles of iron (rounded to two decimal places)
Therefore, the sample contains 4.51 moles of iron.