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3 years ago

When does the electron shown release the greatest amount of energy as it moves from one level to another?

Chemistry

1 answer:

ELEN [110]3 years ago

8 0

S1 to GS as the amount of energy required to remove the electron is greatest when it is closest to the nucleus. think about two magents. does it take more energy to spereate them when they are far apart or when they are very close together? it's the same idea with electrons. the more energy required to remove, the more energy will be emmitted.

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Who taught us how planets move?

alexdok [17]

Answer:

It is <u>KEPLER</u>

Explanation:

Kepler defined the sun's orbit.

okay.

6 0

3 years ago

Consider the following ionic compounds: CdCO3, Na2S, PbSO4, (NH4)3PO4, and Hg2Cl2. Which compounds will be soluble when added to

Grace [21]

Answer:

a. Na₂S and (NH₄)₃PO₄ .

Explanation:

To know which salts are soluble we need to remember some <em>solubility rules</em>. And apply these as follows:

* All compounds of group 1 (Li⁺, Na⁺, K⁺, etc.) are soluble, Na₂S is soluble.

* All ammonium salts are soluble,

<h3>(NH₄)₃PO₄ is soluble.</h3>

* All Cl⁻, I⁻, Br⁻ are soluble except when are with Ag⁺, Hg₂²⁺, Pb²⁺, Hg₂Cl₂ is <em>insoluble</em>

* Carbonates are insoluble except those with group 1 or ammonium, CdCO₃ is <em>insoluble</em>

* All sulfates are soluble except those with Ca²⁺, Sr²⁺, Ba²⁺, Pb²⁺, Ag⁺. PbSO₄ is <em>insoluble. </em>

Right solution is:

8 0

3 years ago

What is the volume of 220 grams of an object with a density of 55g/cm square

AnnyKZ [126]

I'm assuming that you meant 55 g/cm^3. Density= $\frac{Mass}{Volume}$ . This is the definition of density. If you rearrange this equation by multiplying each side of the equation by the volume, you get: (Density)(Volume)=Mass. Divide each side by the density to get: Volume=Mass/Density. Now just plug everything in:
V=220 (grams)/55 (grams/cm^3)=<u>4 cm^3</u>

4 0

3 years ago

Consider separate samples of water and carbon dioxide, each with the same mass. Which contains the greater number of molecules?

Ahat [919]

Answer: The sample that contains the greater number of molecules is water.

Explanation: To calculate the number of molecules, it is used the Avogadro's number ( $6.02*10^{23}$ particles/molecules). So, considering that the mass to water and carbon dioxide is 1g (it can be any other number), the relationship between moles and molar weight is:

$moles =\frac{mass}{molar weight}$

To water: $moles = \frac{1g}{18 g/mol}$ = 0.05 moles.

Therefore,

1 mol ---- $6.02*10^{23}$ molecules

0.05 moles ---- x

x = $0.30*10^{23}$ molecules of water.

To carbon dioxide: $moles = \frac{1g}{44 g/mol}$ = 0.02 moles.

Therefore,

1 mol ---- $6.02*10^{23}$ molecules

0.02 moles ---- y

y = $0.12*10^{23}$ molecules of carbon dioxide.

7 0

3 years ago

PLEASE PLEASE PLEASE HELP, I KNOW YOU WONT BUT, WHOEVER ANSWERS IS THE KINDEST PERSON ON EARTH!!!!!!!!!!!

andrey2020 [161]

Population- The amou t of living organisms/beings that can live and thrive in a certain sized area

things that can cause organisms to compete
-Food
-Water
-Shelter*(I am not 100% on this, forgive me)

8 0

3 years ago