Question

True or False. The gleaming metallic appearance of the Gateway Arch in St. Louis, Missouri, comes from the stainless steel used in its construction. This steel is made mostly of iron, but it also contains 19% (by mass) chromium and 9.0% (by mass) nickel.

Answer 1

True

Step-by-step explanation:

This will mean that from the assumed mass Chromium (Cr) = 19%, and Nickel (Ni) = 9%

This therefore means that Iron (Fe) = 72%

If we change this to mole we will further see that the ratio of Cr to Ni atoms is about 2.4 to 1