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3 years ago

What is the electron configuration of an element with atomic number 20?

Chemistry

2 answers:

Vedmedyk [2.9K]3 years ago

8 0

[Ar]4s^2
hope it helps

blagie [28]3 years ago

4 0

Answer:

What is the electron configuration of an element with atomic number 20? 1s2 2s2 2p6 3s2 3p6 4s2

Explanation:

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Rus_ich [418]

Answer:

The answer is B

Explanation:

The answer is B because representative particles can only be atoms.

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3 years ago

What is a net ionic equation?

jolli1 [7]

Answer:

I think it will option D hope it helps

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3 years ago

What diffuses more quickly: tetracarbon decahydride (C4H10) or iodine (12)? By how much?

ValentinkaMS [17]

Answer: Butane will effuse more quickly because it has a smaller molar mass

Explanation:

Molar mass of C4H10 = 58.123 g/mole

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3 years ago

6) A volume of 473 mL of oxygen was collected at 27°C. What volume would the oxygen occupy at

sertanlavr [38]

Answer : The volume of oxygen occupy at 173° would be, 703.2 mL

Explanation :

Charles' Law : It states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=473mL\\T_1=27^oC=(27+273)K=300K\\V_2=?\\T_2=173^oC=(173+273)K=446K$

Now put all the given values in above equation, we get:

$\frac{473mL}{300K}=\frac{V_2}{446K}\\\\V_2=703.2mL$

Therefore, the volume of oxygen occupy at 173° would be, 703.2 mL

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3 years ago

Answer please I don’t understand number 12

yan [13]

The density is mass divided by volume

5 0

4 years ago

Read 2 more answers