Question

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
SubmitHintsMy AnswersGive UpReview Part

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.

Answer 1

Answer:

50. 5mol

Explanation:

The mass of Zinc required = 3.30 kg = 3300 grams

The relation between moles and mass is:

$moles=\frac{mass}{atomicmass}$

Atomic mass of Zinc = 65.38g/mol

$molesofZinc=\frac{3300}{65.38}$

$molesofzinc=50.47mol$

The answer to three significant figures will be 50.5 mol