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3 years ago

Describe what each component of the Currents Tank Investigation represents. WILL MARK BRIANNLIST PLEASE!!!!!!!

Chemistry

1 answer:

Reika [66]3 years ago

3 0

Answer:

Its b

Explanation:

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Find the weighted average for the three following isotopes:

Phantasy [73]

Answer:

Um is there supposed to be a picture?

Explanation:

6 0

3 years ago

Nickel has an FCC structure and an atomic radius of 0.124 nm. (12 points) a. What is the coordination number? b. Calculate the A

LekaFEV [45]

Answer:

a)CN=12

b)APF=74 %

c)a=0.35 nm

d)ρ=9090.9 $Kg/m^3$

Explanation:

Given that

Nickel have FCC structure

We know that in FCC structure ,in FCC 8 atoms at corner with 1/8 th part in one unit cell and 6 atoms at faces with 1/2 part in one unit cell .

Z=8 x 1/8 + 1/2 x 6 =4

Z=4

Coordination number (CN)

The number of atoms which touch the second atoms is known as coordination number.In other word the number of nearest atoms.

CN=12

Coordination number of FCC structure is 12.These 12 atoms are 4 atoms at the at corner ,4 atoms at 4 faces and 4 atoms of next unit cell.

APF

$APF=\dfrac{Z\times \dfrac{4}{3}\pi R^3}{a^3}$

We know that for FCC

$4R=\sqrt{2}\ a$

Now by putting the values

$APF=\dfrac{4\times \dfrac{4}{3}\pi R^3}{\left(\dfrac{4R}{\sqrt2}\right)^3}$

APF=0.74

APF=74 %

$4R=\sqrt{2}\ a$

$4\times 0.124=\sqrt{2}\ a$

a=0.35 nm

Density

$\rho=\dfrac{Z\times M}{N_A\times a^3}$

We know that M for Ni

M=58.69 g/mol

a=0.35 nm

$N_A=6.023\times 10^{23}\ atom/mol$

$\rho=\dfrac{Z\times M}{N_A\times a^3}$

$\rho=\dfrac{4\times 58.69}{6.023\times 10^{23}\times( 0.35\times 10^{-9})^3}\ g/m^3$

ρ=9090.9 $Kg/m^3$

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3 years ago

A(n) __________________ is a statement of what you think will happen during an investigation. It is often written in the form of

slega [8]

Answer:

Hypothesis. Hope this helped! :)

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3 years ago

What is not a guideline required for a valid evidence test?

kirill115 [55]

I just took that quiz , it’s A

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3 years ago

Which elements have only one electron orbit or shell? A. hydrogen (H) and helium (He) B. helium (He) and lithium (Li) C. krypton

mixer [17]

2.1 Electrons, Protons, Neutrons, and Atoms

Hydrogen H 1

Helium He 2

Lithium Li 3

Beryllium Be 4

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4 years ago