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Angelina_Jolie [31]
4 years ago
9

Solids are usually more dense than:

Chemistry
2 answers:
LekaFEV [45]4 years ago
8 0
4.all of the above is the answer

chubhunter [2.5K]4 years ago
3 0

Answer:

All of the above

Explanation:

Hopes this helps, let me know if it's not.

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Thank you for anyone that helps
Stolb23 [73]
C) 6.75 x 10^-7

Hope it helped ya 
7 0
3 years ago
Read 2 more answers
In metallic bonds, the mobile electrons surrounding the positive ions are called a(n)
creativ13 [48]
It is called, Noble gas
5 0
3 years ago
What particles make up the nucleus
Komok [63]
DNA
Nucleoulos
Nuclear Membrane
4 0
4 years ago
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For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply.
uranmaximum [27]

The reaction is incorrect. The correct reaction is: Na₂SO₄ + Hg(NO₃)₂ → HgSO₄ + 2NaNO₃. The options are:

A. Hg₂SO₄

B. Na₂SO₄

C. Na⁺

D. NO₃⁻

E. SO₄⁻²

F. Hg₂(NO₃)₂

G. NaNO₃

H. Hg⁺²

Answer:

C, D, E, H

Explanation:

The ions are formed after dissociation of the compound in the solution. When they're negatively charged, they're called anions, when they're negatively charged, they're called cations. If the ion is presented on both sides of the reaction, it is called a spectator ion.

Thus, the reaction given:

Na₂SO₄ + Hg(NO₃)₂ → HgSO₄ + 2NaNO₃

So, let's do the dissociation.

Na₂SO₄ is formed by the ions Na⁺ and SO₄⁻²;

Hg(NO₃)₂ is formed by the ions Hg⁺² and NO₃⁻;

HgSO₄ is formed by the ions Hg⁺² and SO₄⁻²;

NaNO₃ is formed by the ions Na⁺ and NO₃⁻.

Thus, the spectator ions are Na⁺, SO₄⁻², Hg⁺², and NO₃⁻.

7 0
4 years ago
Question 7 options: The cell potential of an electrochemical cell made of an Fe, Fe2 half-cell and a Pb, Pb2 half-cell is _____
larisa [96]

Answer: Thus the cell potential of an electrochemical cell is +0.28 V

Explanation:

The calculation of cell potential is done by :

E^0=E^0_{cathode}- E^0_{anode}

Where both E^0 are standard reduction potentials.

E^0_{[Fe^{2+}/Fe]}= -0.41V

E^0_{[Pb^{2+}/Pb]}=-0.13V

As Reduction takes place easily if the standard reduction potential is higher(positive) and oxidation takes place easily if the standard reduction potential is less(more negative). Thus iron acts as anode and lead acts as cathode.

E^0=E^0_{[Pb^{2+}/Pb]}- E^0_{[Fe^{2+}/Fe]}

E^0=-0.13- (-0.41V)=0.28V

Thus the cell potential of an electrochemical cell is +0.28 V

5 0
3 years ago
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