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Len [333]
2 years ago
12

8. (02.04 MC)

Chemistry
1 answer:
elena55 [62]2 years ago
3 0

Answer:

3p^2

Explanation:

after filling 3s^2 only two electrons  left out of 14 so the next sub shell is 3p therefore ,X represents 3p^2

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A neutral atom has 1 valence electron and its atomic mass is 39. How many
uranmaximum [27]

Answer: I think probaly wrong so probaly dont

listen to me

Explanation:

5 0
3 years ago
A balloon contains 3.20 L of helium. The pressure is reduced to 59.0 kPa, and the
pshichka [43]

Answer:

101.4pKa

Explanation:

Given parameters:

Initial Volume of helium  = 3.20L

Final pressure of helium  = 59kPa

Final volume on helium gas = 5.5L

Unknown:

Initial pressure exerted on the balloon = ?

Solution;

To solve this pressure - volume problem, we simply apply the Boyle's law.

It states that "the volume of a fixed mass gas varies inversely as the pressure changes if the temperature is constant".

  Mathematically;

         P1 V1  = P2 V2

Now, insert parameters and solve;

         P1 x 3.2 = 59 x 5.5

          P1  = 101.4pKa

4 0
3 years ago
Steve traveled the first 7 hours of his
const2013 [10]

Answer:

64

Explanation:

Distance traveled in 2 hours = 2 * 40 = 80 m

Distance traveled in 3 hours = 3 * 80 = 240m

Total distance covered = 240 + 80 = 320m

Total time = 2 + 3 =5 h

Hence avg speed = total distance covered / total time taken

= 320/5 = 64mph

5 0
3 years ago
Help me with this please! Do not say "I don't know" to get my points!!!!!!! It is not helpful and disrespectful. THANKS!
MariettaO [177]

no- and na- nano5

na- and na+ nana2

hope this helps

Explanation:

4 0
3 years ago
Balance the equation to show the reaction between H2SO4 and cu(OH)2​
sveticcg [70]

Answer:

H2SO4 + Cu(OH)2​ ---> CuSO4+ 2H2O

5 0
3 years ago
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