Question

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part a

a lead fishing weight contains 0.16 mol of lead atoms. what is its mass?
express your answer in grams to two significant figures.

m =
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Explanation:

Step1: Find the molar mass of lead

The molar mass of lead ($Pb$) is $207.2\ g/mol$.

Step2: Use the formula $m = n\times M$

Here, $n = 0.16\ mol$ (amount of substance) and $M=207.2\ g/mol$ (molar mass).
So, $m=0.16\ mol\times207.2\ g/mol$.
$m = 33.152\ g$.

Step3: Round to two significant figures

Rounding $33.152$ to two significant figures gives $33\ g$.

Answer:

$33\ g$