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 3.40 kg on the surface to get adequate coverage. Part A How many moles of zinc are in 3.40 kg of zinc? Express your answer to three significant figures and include the appropriate units.

Answer 1

52.0 moles

Step-by-step explanation:

no. of moles of Zn =
`(mass)/(molar mass)=(3400g)/(65.38g/mol)=52.0mol`

The important part in this question is changing the kilograms to grams so that the units of the mass(grams) are divisible by the units of the molar mass (grams/molar mass)