part a\nlead consists of four naturally occurring isotopes. calculate the atomic mass of lead.\nexpress your…

part a\nlead consists of four naturally occurring isotopes. calculate the atomic mass of lead.\nexpress your answer using four significant figures.\natomic mass of pb = amu

part a\nlead consists of four naturally occurring isotopes. calculate the atomic mass of lead.\nexpress your answer using four significant figures.\natomic mass of pb = amu

Answer

Explanation:

Step1: Convert percentages to decimals

$1.40% = 0.0140$, $24.10%=0.2410$, $22.10% = 0.2210$, $52.40%=0.5240$

Step2: Multiply mass by abundance for each isotope

For $^{204}{82}Pb$: $204.0\times0.0140 = 2.856$ For $^{206}{82}Pb$: $206.0\times0.2410=49.646$ For $^{207}{82}Pb$: $207.0\times0.2210 = 45.747$ For $^{208}{82}Pb$: $208.0\times0.5240=109.992$

Step3: Sum up the results

$2.856 + 49.646+45.747 + 109.992=208.241$

Answer:

$208.2$ amu