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2 years ago

Key Concepts 4 Identify What are three advantages of using conceptual models? Help plz

Chemistry

1 answer:

liberstina [14]2 years ago

8 0

Answer:

A Broad View of Concept Modeling

Establishing Key Relationships

Levels of Concept Modeling

Explanation:

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An interpenetrating primitive cubic structure like that of CsCl with anions in the corners has an edge length of 664 pm. If the

san4es73 [151]

Answer:

the ionic radius of the anion $r^- = 312.52 \ pm$

Explanation:

From the diagram shown below :

The anion $Cl^-$ is located at the corners

The cation $Cs^+$ is located at the body center

The Body diagonal length = $\sqrt{3 \ a }$

∴ $2 \ r^+ \ + 2r^- \ = \sqrt{3 \ a} \\ \\ r^+ +r^- = \frac{\sqrt{3}}{2} a$

Given that :

$\frac{r^+}{r^-} =0.84$ (i.e the ratio of the ionic radius of the cation to the ionic radius of

the anion )

$0.84r^- \ + r^- \ = \frac{\sqrt{3}}{2}a \\ \\ 1.84 r^- = \frac{3}{2}a \\ \\ r^- = \frac{\sqrt{3}}{2*1.84}a$

Also ; a = 664 pm

Then :

$r^- = \frac{\sqrt{3} }{2*1.84}*664 \ pm\\ \\ r^- = 312.52 \ pm$

Therefore, the ionic radius of the anion $r^- = 312.52 \ pm$

4 0

2 years ago

Calculate the number of neutrons in potassium-40.

dsp73

Answer:

21 neutrons

Explanation:

There are 21 neutrons in Pottasium-40

5 0

2 years ago

Read 2 more answers

A rock has a density of 3.75g/cm3 and a mass of 26g. What is the volume of the rock?

Lemur [1.5K]

Answer:

<h3>The answer is 6.93 cm³</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question we have

$volume = \frac{26}{3.75} \\ = 6.93333333...$

We have the final answer as

Hope this helps you

8 0

2 years ago

Charle's Law

Setler [38]

Convert temperature to Kelvin

225°C=498K
127°C=400K

Convert vol to L

400mL=0.4L

Apply Charles law

V1T_2=V2T_1
0.4(400)=498V_2
160=498V_2
V_2=0.32L=320mL

8 0

1 year ago

Read 2 more answers

Isotopes are created by adding or removing neutrons from the nucleus.

valina [46]

Answer:

<h2>This is TRUE statement... </h2>

Explanation: 

When you remove or add a neutron to the nucleus of an atom, the resulting substance is a new type of the same element and is called an isotope.

<h2>Hope it helps you✨.</h2>

Thanks☸☸

4 0

2 years ago