Verified Answer :

Beth1309

To work this out we need to use the equation Mass=n (moles) x Mr.

The Mr of Lithium is 6.941.

Therefore we need to do
Mass=12.82x6.941

Making the answer 88.98g

Answer:

The mass of 12.82 moles of lithium (Li) atoms is 88.98 g.

Explanation:

Moles of lithium = 12.82 mol

Atomic mass of lithium = 6.941 g/mol

Mass of 12.82 moles of lithium =

\(12.82 mol\times 6.941 g/mol=88.98 g\)

The mass of 12.82 moles of lithium (li) atoms is 88.98 g.

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