Answer:
the answer how you analyzs the problwm
Horace and John Dodge founded the Dodge Brothers Company in Detroit in 1900, and quickly found work manufacturing precision engine and chassis components for the city's growing number of automobile firms. Chief among these customers were the established Olds Motor Vehicle Company and the new Ford Motor Company.
Given:
Lattice parameter, a =
Solution:
We know that for FCC, total no. of atoms in a crystal lattice = 4
let the number of atoms in Tin for alloying be 'n'
⇒ Total no. of Copper atoms in the alloy, = 4 - n
Also mass of Copper, m = 63.54 g/mol
atomic mass of Tin = 118.69 g/mol
We Know density of the crystal lattice is given by the formula:
(1)
where,
= Avagadro's number =
Putting all the values in eqn (1), we get
280.6 = 55.15n +254.16
n = 0.479 atoms/cell
Now to calculate the atomic percentage of Tin present in the alloy:
atomic percentage =
atomic % Tin present in alloy = =
atomic % Tin present in alloy = 11.98%
Technician A is incorrect so that means Technician B is correct.