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morpeh [17]
3 years ago
7

What is the name of the element that has electrons arranged 2,8,2 ​

Chemistry
2 answers:
poizon [28]3 years ago
7 0

Answer:

The metal element → Magnesium (Mg)

Alexus [3.1K]3 years ago
6 0

Answer:

magnesium

Explanation:

magnesium has electrons arranged 2,8,2

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In your own words, describe in as much detail as possible, what is air made of.
Advocard [28]

Answer:

nitrogen, oxygen, argon, carbon dioxide, neon, helium, krypton, hydrogen, and xenon. It does not include water vapor because the amount of vapor changes based on humidity and temperature.

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3 years ago
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For the decomposition of calcium carbonate, consider the following thermodynamic data (Due to variations in thermodynamic values
In-s [12.5K]

Answer : The temperature in kelvins is, T>1108.695K

Explanation : Given,

\Delta H = 178.5 KJ/mole = 178500 J/mole

\Delta S = 161.0 J/mole.K

Gibbs–Helmholtz equation is :

\Delta G=\Delta H-T\Delta S

As per question the reaction is spontaneous that means the value of \Delta G is negative or we can say that the value of \Delta G is less than zero.

\Delta

The above expression will be:

0>\Delta H-T\Delta S

T\Delta S>\Delta H

T>\frac{\Delta H}{\Delta S}

Now put all the given values in this expression, we get :

T>\frac{178500J/mole}{161.0J/mole.K}

T>1108.695K

Therefore, the temperature in kelvins is, T>1108.695K

7 0
3 years ago
What are essential elements in plants?​
madam [21]

Answer:

Chlorophyll is one. I can't quite remember other

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7. What must you do before you make a hypothesis?
almond37 [142]

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Ask a question?

Explanation:

look at the scientific method uwu

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Which of the following characterizes an ionic bond?
velikii [3]

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option A

I think so good night sweet dreams

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