Consider the two beakers labeled A and B. Beaker A contains 1 mole of iron atoms, and Beaker B contains 1 mole of lead atoms. Which statement concerning these samples is known with certainty?

The provided question is incomplete, however, the complete question is attached with

The correct answer is : option A. Beakers A and B contain an equal number of atoms.

Explanation:

No matter what is the element or substance, in one mole of any elemnet r metal or anything have 6.022×1023 everythings. So, beaker A have one mole of iron Fe and beaker B have one mole of Lead Pb, then the total atoms in each beaker will be equal that is :

1 mole of Fe =  1× 6.022×1023 atoms/mol

1 mole of Pb = 1× 6.022×1023 atoms/mol

Thus, the correct answer is: option A. Beakers A and B contain an equal number of atoms.