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kvv77 [185]
3 years ago
6

Give the location of the elements found in the periodic table which have the same number valence electrons.

Chemistry
2 answers:
Rina8888 [55]3 years ago
7 0

Answer:

B - all numbers within any group (vertical column)

Explanation:

https://en.wikipedia.org/wiki/Valence_electron

stiks02 [169]3 years ago
5 0

Answer:

B - all numbers within any group

Explanation:

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What is the pressure of 0.5 mol of nitrogen gas in a 5 L container at 203 K
Ivan

Answer:

1.67 atm.

Explanation:

  • We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm (P = ??? atm).

V is the volume of the gas in L (V = 5.0 L).

n is the no. of moles of the gas in mol (n = 0.5 mol).

R is the general gas constant (R = 0.0821 L.atm/mol.K),

T is the temperature of the gas in K (T = 203 K).

∴ P = nRT/V = (0.5 mol)(0.0821 L.atm/mol.K)(203 K)/(5.0 L) = 1.67 atm.

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Complete the chemical reaction that occurs when dimethylamine (ch3)2nh reacts with water.
grandymaker [24]
Dimethyl amine is Base. The basic character of it is due to the presence of lone pair of electron on nitrogen atom. The strength of amines is basically due to the presence of alkyl group attached to nitrogen atom. These alkyl groups donates electron to nitrogen atom hence increasing electron density on nitrogen and increasing its basic character.

When dimethylamine ( Kb = 5.9 × 10⁻⁴) is reacted with water it abstracts proton from water molecule convertion it into Hydroxide Ion (i.e ⁻OH). The reaction is as follow,

                          (CH₃)₂N  +  H₂O   →   (CH₃)₂N⁺H   +   ⁻OH
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