Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is

Zn2+(aq)+2e−→Zn(s)

For a large batch of nails, a manufacturer needs to plate a total zinc mass of 3.30 kg on the surface to get adequate coverage.

Part A

How many moles of zinc are in 3.30 kg of zinc?

Express your answer to three significant figures and include the appropriate units.

50.5 mol
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Correct

Significant Figures Feedback: Your answer 50.47mol was either rounded differently or used a different number of significant figures than required for this part.

Respuesta :

Answer:

50. 5mol

Explanation:

The mass of Zinc required = 3.30 kg = 3300 grams

The relation between moles and mass is:

[tex]moles=\frac{mass}{atomicmass}[/tex]

Atomic mass of Zinc = 65.38g/mol

[tex]molesofZinc=\frac{3300}{65.38}[/tex]

[tex]molesofzinc=50.47mol[/tex]

The answer to three significant figures will be 50.5 mol

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