Thursday
August 21, 2014

Homework Help: Chemistry

Posted by Sara on Wednesday, July 10, 2013 at 3:44pm.

A couple questions here:

1. How do you expect nitriding to change the properties of iron?
a) Nitriding makes iron stronger.
b) Nitriding makes iron weaker.
c) Nitriding makes iron more electrically conductive.
d) Nitriding makes iron less electrically conductive.


2. Calculate the relative number of atoms of each element contained in each of the following alloys. (Assume the amounts per 100 g of the alloy.)

(a) Wood's metal, which is a low-melting-point alloy used to trigger automatic sprinkler systems and is 12.5% tin, 12.5% cadmium, and 24% lead by mass in bismuth
Bi :
Cd :
Pb :
Sn

(b) a stainless steel that is 13% chromium in iron
Fe :
Cr

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