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3 years ago

Identify one advantage to each of the following models of electron configuration:

Chemistry

2 answers:

Crank3 years ago

6 0

Answer:

Dot structures make it easy to count electrons and they show the number of electrons in each electron shell.

Arrow and line diagrams show the spin of electrons and show every orbital.

Written configurations require minimal space and show the distribution of electrons between subshells.

Explanation:

Blizzard [7]3 years ago

5 0

Answer:

Dot structures make it easy to count electrons and they show the number of electrons in each electron shell.

Arrow and line diagrams show the spin of electrons and show every orbital.

Written configurations require minimal space and show the distribution of electrons between subshells.

Explanation:

That was on Edgenuity

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25. Which of the following is represented in the highest percentage by volume in dry air? A. Carbon dioxide B. Hydrogen C. Nitro

emmasim [6.3K]

The correct option is C. Nitrogen gas has the highest percentage by volume of all the gases that make up the air.
The composition of the air is as follows:
nitrogen = 78.09%
Oxygen = 20.95%
Argon = 0.93%
Carbon dioxide = 0.04%
water vapour = traces amount.

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4 years ago

A scientist produces zinc iodide (zni2). (a) calculate the minimum mass of zinc that needs to be added to 0.500 g of iodine so t

harina [27]

The minimum mass of Zinc, Zn that needs to be added to 0.500 g of iodine so that the iodine fully reacts is 0.128 g

<h3>Balanced equation </h3>

Zn + I₂ —> ZnI₂

Molar mass of Zn = 65 g/mol

Mass of Zn from the balanced equation = 1 × 65 = 65 g

Molar mass of I₂ = 127 × 2 = 254 g/mol

Mass of I₂ from the balanced equation = 1 254 = 254 g

SUMMARY

From the balanced equation above,

254 g of I₂ required 65 g of Zn

<h3>How to determine the mass of Zn needed </h3>

From the balanced equation above,

254 g of I₂ required 65 g of Zn

Therefore,

0.5 g of I₂ will require = (0.5 × 65) / 254 = 0.128 g of Zn

Thus, the minimum mass of Zn required is 0.128 g

Learn more about stoichiometry:

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2 years ago

What role does the rock play

goldfiish [28.3K]

Rocks are part of our planet. They tell stories like how they were formed and which environment they belong in. And it also tells us things about the past, because rocks came long before humans did.

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3 years ago

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What is the enthalpy change (in kj) of a chemical reaction that raises the temperature of 250.0 ml of solution having a density

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<span>250 ml * 1.25 g/ml * 3.74 j/g-K * 9.2 K = 10.752 kJ Pretty much, all you need to do here is multiply all of these out to get your final answer. Not all questions are this easy, but this is certainly one of them.</span>

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4 years ago

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How many milliliters of concentrated hydrochloric acid solution (36.0% HCl by mass, density = 1.18 g/mL) are required to produce

poizon [28]

W=0.360
p=1.18g/mL
pH=2.12
v=14.0 L
M(HCl)=36.46 g/mol
v₀-?

1) pH=-lg[H⁺]

[H⁺]=c(HCl)=10^(-pH)

n(HCl)=v[H⁺]=v*10^(-pH)

2) n(HCl)=m(HCl)/M(HCl)=wv₀p/M(HCl)

3) v*10^(-pH)=wv₀p/M(HCl)

v₀=v*10^(-pH)M(HCl)/(wp)

v₀=14.0*10^(2.12)*36.46/(0.360*1.18)=9.115 mL

Approximately 9.1 mL of concentrated solution required.

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4 years ago