Question

24. What is the mass in grams of 1.0 × 10^12 lead (Pb)
atoms? (atomic mass of Pb = 207)​

Answer 1

Answer:

34.37×10^-11 gm

Explanation:

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Answer 2

Answer:

Explanation:

Avogadro Number - The Avogadro constant is a proportionality factor that connects the number of constituent particles in a sample to the amount of material present. The reciprocal mole is its SI unit, and it is defined as NA =  6.02214076×10²³ mol⁻¹. It is named after Amedeo Avogadro, an Italian scientist.

Pb atom = 1 X $10^{12}$

Number of moles = Mass of the atom given / Avogadro's Number

Number of moles = $\frac{1 X 10^{12} }{6.022 X 10^{23} }$

Mass of Pb = 0.16  X  $10^{-11}$ X 207 = 34.37 X $10^{-11}$ gm