That is equal to 0.65 (mol Pb) * 207.2 (g/mol Pb) = 135 grams Pb
207.2 = molar mass of Pb, lead.
5 moles of lead is equal to 1 036 g.
1,4 moles of lead(II) oxide are formed.
If 17,4 is grams the number of moles is 0,084.
The value is 0,0025 moles.
Mole times Lead's Molecular mass(Mr) gives you its mass And I think the Mr of Lead is 207
5 moles of lead is equal to 1 036 g.
Atomic mass: 207.2 grams.455 moles × (6.02 × 1023) = 2.74 × 1023 atoms of lead
There are 2.49 x 10^-12 moles of lead in that sample.
2.3456 grams lead (1 mole Pb/207.2 grams) = 0.01132 moles of lead =================
1,4 moles of lead(II) oxide are formed.
If 17,4 is grams the number of moles is 0,084.
The value is 0,0025 moles.
2.16 X 1024 atoms lead (1 mole Pb/6.022 X 1023) = 3.59 moles of lead ==============
3.25 X 10^20 atoms lead (1 mole lead/6.022 X 10^23) = 5.40 X 10^-4 moles lead
you calculate the number of moles by working out the gram formula mass of Lead II iodide, which should be 461.03 g/mol, and divide that by the measured ammound of substance you have in grams. That will give you the number of moles of substance you have.
2
A lot! 9.51 X 103 grams Pb (1 mole Pb/207.2 grams) = 45.9 moles of lead ===============