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3 years ago

The electron configuration of an element is [Ar] 4s23d104p2. Identify this element.

Chemistry

1 answer:

algol133 years ago

4 0

Answer:

The element is germanium (Ge)

Explanation:

First of all we are considerating a neutral state element, meaning that it has the same amount of electrons and protons.

Also, [Ar] 4s2 3d10 4p2. means that the unknown element has the same electronic configuration as Argon, plus the electrons in the 4s, 3d and 4p.

So:

Argon has 18 electrons and protons (atomic number Z=18)

The element has 2 electrons in 4s, 10 in 3d and 2 in 4p: 2+10+2=14

The total electrons it has is: 14+18=32 electrons, and as we said before it also has 32 protons.

Once calculated the protons, we know the atomic number (Z=32) and we can look in the periodic table the element with Z=32.

That element is germanium (Ge)

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How many significant figures are in measurement 0.00304kg

mina [271]

Significant figures are numbers that are not 0s, but they are included if they are between two numbers:
There are three significant figures, 304

Hope this helps! :)

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3 years ago

How many grams of carbon dioxide are produced from the combustion of 250.G of ethane, C3H8 in the reaction C3H8 +5O2 - 3CO2 +4H2

ludmilkaskok [199]

Answer:

750 g of CO₂

Explanation:

The balanced equation for the reaction is given below:

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

Next, we shall determine the mass of C₃H₈ that reacted and the mass of CO₂ produced from the balanced equation. This can be obtained as follow:

Molar mass of C₃H₈ = (12×3) + (8×1)

= 36 + 8 = 44 g/mol

Mass of C₃H₈ from the balanced equation = 1 × 44 = 44 g

Molar mass of CO₂ = 12 + (16×2)

= 12 + 32 = 44 g/mol

Mass of CO₂ = 3 × 44 = 132 g

SUMMARY:

From the balanced equation above,

44 g of C₃H₈ reacted to produce 132 g of CO₂.

Finally, we shall determine the mass of CO₂ produced by the reaction of 250 g of C₃H₈. This can be obtained as follow:

From the balanced equation above,

44 g of C₃H₈ reacted to produce 132 g of CO₂.

Therefore, 250 g of C₃H₈ will react to produce = (250 × 132)/44 = 750 g of CO₂.

Thus, 750 g of CO₂ were obtained from the reaction.

8 0

2 years ago

How do i fill out this ICE chart? please help

LuckyWell [14K]

Answer: You can probably go onto You Tube and find that answer! Just be detailed in your search! Hope this helps!

Explanation:

Just Simple Physics :P

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2 years ago

Read 2 more answers

2. A solution in which 50 grams of salute is dissolved in 250 grams of solution has a concentration of

IgorC [24]

The fact that the unit is supposed to be in percent makes me think it is referring to percent mass. To find percent mass you need to find find the divide the mass of solute by the total mass of solution and than multiply that by 100%.
%mass=(50g/300g)x100%
%mass=0.167%

I hope this helps.

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3 years ago

Dipole moment of CHCl3 is less than CH2Cl2 is less than CH3Cl. why?

777dan777 [17]

In case of , CH3Cl, the 3 H atoms and Cl atoms sums up and give it a large dipole moment.
In case of CH2Cl2, the 2 H atoms add up to Cl atoms but one Cl atom cancels out half of the effect of other Cl atom and give it a smaller dipole moment compared to CH3Cl..
In case of CH3Cl, one H atom adds up and 3 Cl atoms cancel each others effect and give it a much smaller dipole moment...

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3 years ago