If the work function of tin (Sn) is 281 nm, what equation could you use to determine the amount of energy required to eject a photoelectron from a sample of tin?

See explanation

Explanation:

The work function is given by;

Wo = hc/λ

where;

h = 6.6 * 10^-34 Js

c = 3 * 10^8 ms-1

λ = 281 nm or 281  * 10^-9 m

Wo = 6.6 * 10^-34 * 3 * 10^8 /  281  * 10^-9

Wo = 7.0 * 10^-19 J or 4.375 eV

Note that the work function is the minimum energy required to eject an electron from a sample of tin.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

the answer is c i believe