To convert the given number of atoms of Pb (lead) to grams, we need to use the atomic mass of Pb and Avogadro's number.
The atomic mass of Pb is 207.2 g/mol, which means that one mole of Pb atoms has a mass of 207.2 grams.
Avogadro's number is 6.022 x 10^23, which represents the number of particles (atoms or molecules) in one mole of a substance.
Using these values, we can calculate the mass of 1.75 x 10^23 atoms of Pb as follows:
1. Number of moles of Pb atoms:
1.75 x 10^23 atoms / 6.022 x 10^23 atoms/mol = 0.2905 moles
2. Mass of Pb atoms:
0.2905 moles x 207.2 g/mol = 60.1936 g
Therefore, 1.75 x 10^23 atoms of Pb have a mass of approximately 60.1936 grams.