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Orlov [11]
3 years ago
13

What is the predicted electron configuration of Helium

Chemistry
1 answer:
Crank3 years ago
6 0

1s²

Explanation:

The predicted electron configuration of Helium 1s².

Helium is an element with atomic number of 2. it is located on the last group on the periodic table.

  • Electron distribution into the energy levels or sublevels of atoms can be shown using electronic configurations.

Here, the two electrons in Helium fills the first energy level with s-sublevel first.

The maximum number of electrons in the sub-level is 2: this gives the 1s² configuration.

Learn more:

Electronic configuration brainly.com/question/6312987

#learnwithBrainly

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When 15.0 g of fluorite (CaF₂) reacts with excess sulfuric acid, hydrogen fluoride gas is collected at 744 torr and 25.5°C. Soli
8090 [49]

The reaction equation is:  CaF₂ + H₂SO₄ → 2HF + CaSO₄

The molar ratio between fluorite and hydrogen fluoride is 1 : 1.

The moles of fluorite supplied are:

Moles = 15 / 78.07                            Moles = 0.200

The moles of hydrogen fluoride produced will be 0.2.Now, we may use the ideal gas equation to determine the temperature:

PV = nRT                                            T = PV/nR

T = (875 * 8.63) / (0.2 * 62.36)

T = 605.45K

The temperature will be 331.85 °C  which is  required to store the gas in an 8.63-L container at 875 torr.

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brainly.com/question/6776000

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3 0
2 years ago
Density is given in ____. a. Pa/cm3 c. g/s2 b. N/m2 d. g/cm3 Please select the best answer from the choices provided A B C D
Ray Of Light [21]
Density is given in Mass/Volume so the answer is D
7 0
3 years ago
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Which of the following is not an organic compound?<br> Corn oil<br> Bromine<br> Methane<br> Protein
zloy xaker [14]
The correct answer is Bromine 
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6 0
3 years ago
A 2.4L balloon filled with helium at room temperature 25oC is put into liquid nitrogen
Stels [109]

Answer:

V₂ = 0.62 L

Explanation:

Given data:

Initial volume = 2.4 L

Initial temperature = 25°C

Final temperature = -196°C

Final volume = ?

Solution:

Initial temperature = 25°C (25+273 = 298 K)

Final temperature = -196°C ( -196+273 = 77 K)

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 2.4 L × 77 K / 298 k

V₂ = 184.8 L.K / 298 K

V₂ = 0.62 L

5 0
2 years ago
Are they all correct?
Degger [83]

Answer:yes

Explanation:

7 0
3 years ago
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