The difference between the initial (first) position and the final position of an object

A+100+gram+alloy+of+nickel+and+copper+consists+of+70+wt+%+ni+and+30+wt+%+cu.+what+are+the+atom+percentages+of+ni+and+cu+in+this+

Softa [21]

Atomic percentages: 68% of copper and 32% of nickel.

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%

What are Cu-Ni alloys?

Cu-Ni alloys are alloys of copper (base metal with the largest individual content) and nickel with or without other elements, whereby the zinc content may not be more than 1%.
When other elements are present, nickel has the largest individual content after copper, compared with each other element.
As with other copper alloys, it is necessary to distinguish between wrought alloys, which are processed to semi-finished products, and cast alloys, from which castings are produced by various casting processes.

To know more about Cu-Ni alloys, refer:

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6 0

2 years ago

Fabric A is used to rub a wooden rod. A second piece of Fabric A is used to rub an ebonite rod. It is observed that the wooden r

stepladder [879]

<h2>Answer:</h2>

<h3>What I think is : The protons are present at the centre of the atom with rotating electrons around it so when it is rubbed by fur the electrons get passed from the ebonite rod to the fur leaving the rod negatively charged</h3>

<h2>Hope this helps you ❤️</h2>

<h2>Mark me as brainliest ❤️</h2>

6 0

3 years ago

A 3.5L container has a gas pressure of 5.3atm. If the volume is decreases to 1.4L. What will be the new pressure inside the cont

Nat2105 [25]

Answer:

your answer for that problem is 34.5

8 0

3 years ago

Read 2 more answers

A researcher dispenses distilled deionized water from a 20-ml volumetric pipet into an empty 8.4376 g weighting bottle. If the t

bonufazy [111]

As given that some volume of water has been dispensed say "x mL"

The initial weight of bottle =8.4376 g

The final weight of bottle + water =28.5845 g

So weight of water transferred = 28.5845 g - 8.4376 g = 20.1469 g

Now there is a relation between density, mass and volume

density = mass / volume

Therefore

Volume = mass / density

So volume of water dispensed = mass dispensed / density =20.1469 g / 0.9967867 g/ml.

Volume of water = 20.2118467 mL

7 0

4 years ago

The geometry is called pentagonal bipyramidal. This has a lot of similarities to a 6-coordinate molecule except there are 5 doma

Studentka2010 [4]

Solution :

A pentagonal bipyramidal is a bond structure where the bond angle that surrounds an atom is not identical. Different bond angles are different. It has one central atom having seven ligands at the corners of the pentagonal bipyramidal.

a). The shape of the molecule that have 7 bonding domains is called the pentagonal bipyramidal. For example take the case of $IF_7$ .

The structure of the molecule is attached below.

b). The bond angles that can be possible between all the adjacent atoms are 72 degrees and 90 degrees.

c). The lone pair is represented by E and the 6 bonding domains, the geometry is the pentagonal pyramidal, that is in the case of $\text{XeOF}^-$ .

d). With two lone pairs, which is represented by E and as many as 5 bonding domains, the geometry is described as pentagonal planar. For example, $\text{XeF}^-_5$

7 0

3 years ago