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alekssr [168]
3 years ago
13

I give 10 points for 3 tasks + BRAINLIEST!!!!

Chemistry
1 answer:
Marta_Voda [28]3 years ago
6 0
<span>21. F, Cl and Br.

22. </span>Since it is in Group 3 it will have 3 valence electrons. When you draw the Lewis structure for Aluminum you'll put three<span> "dots" or valence electrons around the element symbol.

23. </span><span>you would need 2 group 17's for every 1 group 2</span>
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Which nitrogen base sequence is the partner of C-A-T-C-G-A?
aalyn [17]

Answer:

G-T-A-G-C-T

this is the answer

7 0
3 years ago
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Groups of the periodic table correspond to elements with:
myrzilka [38]
D. similar number of nuetrons
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4 years ago
A reaction mixture initially contains 0.86 atm NO and 0.86 atm SO3. Determine the equilibrium pressure of NO2 if Kp for the reac
dlinn [17]

Explanation:

Reaction equation for this reaction is as follows.

     NO(g) + SO_{3}(g) \rightarrow NO_{2}(g) + SO_{2}(g)

It is given that K_{p} = 0.0118.

According to the ICE table,

              NO(g) + SO_{3}(g) \rightarrow NO_{2}(g) + SO_{2}(g)

Initial:           0.86      0.86               0            0

Change:          -x          -x                 +x           +x

Equilibrium:  0.86 - x   0.86 - x         x           x

Hence, value of K_{p} will be calculated as follows.

           K_{p} = \frac{P_{NO_{2}} \times P_{SO_{3}}}{P_{NO} \times P_{SO_{3}}}

         0.0118 = \frac{x \times x}{(0.86 - x)^{2}}

             x = 0.084 atm

Thus, we can conclude that P_{NO_{2}} is 0.084 atm.

4 0
4 years ago
Which term refers to an element that conducts electricity at high temperatures, but not at low temperatures?
siniylev [52]
Answer: metal

Explanation: it says element so conductor and semiconductor are out and a halogen is a group of gases on the periodic table so this brings up to a conclusion of metal.

NOTE: I am not a professional***
4 0
3 years ago
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Explain why this statement is false.“Because there is no change in composition during a physical change, the appearance of the s
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