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Sagot :
Atomic percentages: 68% of copper and 32% of nickel.
What are Cu-Ni alloys?
Cu-Ni alloys are mixtures of nickel and copper, the base metal having the highest individual concentration, with or without additional elements. The amount of zinc in a Cu-Ni alloy cannot exceed 1%. When other elements are present, nickel has the second-highest individual content of any element, following copper.
As with other copper alloys, it is important to distinguish between cast alloys, from which castings are made using a variety of casting methods, and wrought alloys, which are processed to semi-finished products.
How this is calculated?
The given alloy is 100 g ,
m(Cu) = 0,7 · 100 g = 70 g.
m(Ni) = 0,3 · 100 g = 30 g.
n(Cu) = m(Cu) ÷ M(Cu) = 70 g ÷ 63,546 g/mol
n(Cu) = 1,10 mol.
n(Ni) = m(Ni) ÷ M(Ni) = 30 g ÷ 58,71 g/mol
n(Ni) = 0,51 mol
n(Cu) : n(Ni) = 1,10 mol : 0,51 mol
%(Cu) = 1,1 mol ÷ 1,61 mol = 0,68 = 68 %.
Similarly, %(Ni)=32%
To know more about Cu-Ni alloys, refer:
https://brainly.com/question/16856761
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