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lapo4ka [179]
4 years ago
6

Identify whether each element is a halogen, a noble gas, or nonmetal only. Astatine (At): Nitrogen (N): Krypton (Kr): Chlorine (

Cl): Sulfur (S):
Chemistry
2 answers:
mash [69]4 years ago
7 0

Answer:

Astatine  are halogens only

Nitrogen  are non metals only

Krypton (Kr) is noble gas only

Chlorine (Cl):  halogen

Sulfur (S)  non metals only

Explanation:

izzie
3 years ago
That is correct :)
sasho [114]4 years ago
3 0

<u><em>Answer:</em></u>

  • Astatine and chlorine are halogens only
  • Nitrogen and sulphur are non metals only
  • Krypton (Kr) is noble gas only

Explanation


  • Krypton (Kr) is noble gas only because it present in group 8 A that is known as noble gases.
  • Nitrogen is present in group 5A which act as non metal
  • Sulphur is present in group  6 A which act as non metal
  • Astatine and chlorine are known as halogens because they are present in group 7 A of the periodic table
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Answer:

The answer to your question is below:

Explanation:

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Using the same procedure and variables as the previous experiment For me, this is the most importan thing when a scientist is designing an experiment, because if he or she follow exactly the same procedure and variables, then the results will be very close.

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5 0
3 years ago
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For a reaction, AH = 176 kJ/mol and A SO = 0.285 kJ/(K•mol). At what
Dominik [7]

Answer:

C. T>617 K

Explanation:

We are given that

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\Delta S=0.285KJ/K\cdot mol

We have to find the temperature at which the reaction is spontaneous.

When

\Delta H>0, \Delta S>0

Therefore, the reaction is spontaneous at certain range of temperature.

Option A is not true.

\Delta G=\Delta H-T\Delta S

When \Delta G is negative, then  the reaction is spontaneous.

\Delta G=176-0.285T

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\Delta G=176-49\times 0.285>0

Therefore, \Delta G is positive.Hence, the  reaction is not spontaneous.

Option B is wrong.

C.T>617K

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\Delta G=176-0.285\times 618=-0.13

Therefore, \Delta G is negative.Hence, the  reaction is spontaneous.

So, option C is true.

D.T<617 K

Suppose T=616 K

\Delta G=176-0.285\times 616=0.44>0

Therefore, \Delta G is positive.Hence, the  reaction is not spontaneous.

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4 0
3 years ago
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chegg

8 0
2 years ago
According to the collision theory, for a reaction to be successful, it must have correct orientation of the atoms of the reactan
bezimeni [28]

The collision must have sufficient energy.

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