Answer:
1.4×10²⁴ atoms
Step-by-step explanation:
Moles of any element can easily be converted into atoms using the conversion factor 6.02*10²³ atoms per mole. Since we have 2.3 moles of lead, we would multiply 2.3 moles by the conversion factor to change the units into atoms using a process called dimensional analysis.
(I recommend watching The Organic Chemistry Tutor's video on dimensional analysis)
If we input this into our calculator, we get 1.4×10²⁴ atoms with sig figs (significant figures), since the original value given also has 2 sig figs. This is easily applicable to similar sorts of problems. Hope this helps.