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stellarik [79]
4 years ago
9

Which element has the same number of energy levels as krypton (Kr) and the same number of valence electrons as nitrogen (N)?

Chemistry
1 answer:
Alex4 years ago
5 0
The correct answer is indeed Arsenic (As). This is the element that fits the description of being in period 4 and group 5, just like Krypton and Nitrogen.
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How does activation energy affect a chemical reaction ?
PilotLPTM [1.2K]

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3 0
3 years ago
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The Mass of the paper before being bumed is 50% how much mass should there be after
neonofarm [45]

0%

Explanation:

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2 years ago
Which of the following is not a conjugate acid-base pair? A) NH4+/NH3 B) H30-OH OC) H2SO3/HSO3 D) C2H302-/HC2H302
raketka [301]

Answer : The option (d) is not a conjugate acid-base pair.

Explanation :

According to the Bronsted Lowry concept, Bronsted Lowry-acid is a substance that donates one or more hydrogen ion in a reaction and Bronsted Lowry-base is a substance that accepts one or more hydrogen ion in a reaction.

Or we can say that, conjugate acid is proton donor and conjugate base is proton acceptor.

(a) The equilibrium reaction will be,

NH_4^++OH^-\rightleftharpoons NH_3+H_2O

In this reaction, NH_4^+/NH_3 are act as a conjugate acid-base.

(b) The equilibrium reaction will be,

H_3O^++OH^-\rightleftharpoons H_2O+H_2O

In this reaction, H_3O^+/OH^- are act as a conjugate acid-base.

(c) The equilibrium reaction will be,

H_2SO_3+OH^-\rightleftharpoons HSO_3^-+H_2O

In this reaction, H_2SO_3/HSO_3^- are act as a conjugate acid-base.

(d) The equilibrium reaction will be,

C_2H_3O_2^-+H_2O\rightleftharpoons HC_2H_3O_2+OH^-

In this reaction, C_2H_3O_2^-/HC_2H_3O_2 are act as a conjugate base-acid.

Hence, from this we conclude that, the option (d) is not a conjugate acid-base pair but it is a act as conjugate base-acid.

6 0
3 years ago
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11111nata11111 [884]

Answer:

I think its B

Explanation:

I don't know how to explain it bc I'm not really sure

6 0
3 years ago
A principal quantum number refers to
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