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Lyrx [107]
3 years ago
15

This jar contains helium gas . what would happen if the lid of this jar was removed ?

Chemistry
1 answer:
Rasek [7]3 years ago
7 0
<span>The Helium gas will expand and rise into the surrounding the air as it is less dense and lighter air. Depending on the amount of helium and the size of the room the Helium could displace the breathable mix in the space and become a danger to health.</span>
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Question 8 of 8&gt; 0 Attempt 2 A chemist needs to determine the concentration of a sulfuric acid solution by titration with a s
Nesterboy [21]

Answer:

12.29 M

Explanation:

  • The reaction that takes place is:

H₂SO₄ + 2NaOH → 2Na⁺ + SO₄⁻² + 2H₂O

  • Now let's calculate the <u>moles of H₂SO₄ that were titrated</u>:

0.1284 M * 0.1915L*\frac{1molAcid}{2molNaOH} = 0.01229 mol H₂SO₄.

  • Thus, the <u>concentration of the diluted solution is</u>:

0.01229 mol H₂SO₄ / 0.010 L = 1.229 M

  • Finally, the <u>concentration of the original acid solution is:</u>

1.229 M*\frac{250mL}{25mL} = 12.29 M

5 0
3 years ago
Which of the following statements provides the BEST explanation for the many chemical similarities between two elements in a Mai
rjkz [21]

Answer:

(b) Both have the same number of valence electrons.  

Step-by-step explanation:

We find the most striking chemical similarities between two Main Group elements when they are in the same Group of the Periodic Table.

Elements in the same Group have the same number of valence electrons.

(a) is <em>wrong</em>, because elements in the same group have <em>different masses</em>.

(c) is <em>wrong,</em> because atoms with the same number of protons belong to the s<em>ame element</em>.

(d) is wrong, because elements in the same Group must be in . <em>different Periods.</em>

7 0
3 years ago
You are given 2 balls that are made of the same material. They are also the same size and color. One is hollow and one is solid.
RUDIKE [14]

Answer:density

Explanation:

it’s how’s how dens the ball is

7 0
3 years ago
Which of the following molecules have the weakest attraction to each other?<br> F2<br> Cl2<br> Br2
bija089 [108]

Answer:

Explanation:

F2 have the weakest attraction to each other because of higher electronegativity when they are brought close to each other they repel each other

5 0
3 years ago
Which is the most important factor in determining the state of a substance?
Contact [7]
Temperature, that's the most important factor
3 0
3 years ago
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