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Kitty [74]
3 years ago
11

Heat energy is transferred on Earth by the processes of convection, conduction, and radiation. How does heat energy cause materi

als to move during convection? Choose the two statements that apply.
A. It causes colder materials to rise.
B. It causes denser materials to sink.
C. It causes warmer materials to sink.
D. It causes less dense materials to rise.
PLEASE HELP MEE!
Chemistry
1 answer:
lana66690 [7]3 years ago
5 0
I think it will be D or B but my mine answer is D
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Ozone (O 3) in the atmosphere can react with nitric oxide (NO): O 3(g) + NO(g) → NO 2(g) + O 2(g). Calculate the ΔG° for this re
Mandarinka [93]

Answer:

ΔG°  = 1022. 8 kJ

Explanation:

ΔH° = –199 kJ/mol

ΔS° = –4.1 J/K·mol

T = 25°C = 25 + 273 = 298K (Converting to kelvin temperature)

ΔG° = ?

The relationship between these varriables are;

ΔG° = ΔH°  - TΔS°

ΔG° = –199 - 298 (–4.1)

ΔG° = -199 + 1221.8

ΔG°  = 1022. 8 kJ

6 0
3 years ago
Aluminium oxide has a very high melting point (2072 degrees C) while carbon dioxide has a very low boiling point (-57 degrees C)
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Answer:

Well, Aluminum Oxide has a very high melting point. Carbon dioxide has a very low boiling point.

Explanation:

They are both talking about different things, melting and boiling. Aluminum Oxide's melting point is much higher then carbon dioxide's melting point. Hope this help, and good luck on your assignment (if one)

5 0
4 years ago
As we grow older.
qwelly [4]

Answer:

I do believe it is A

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5 0
3 years ago
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How is temperature related to the motions of molecules??? please help!!!
Nata [24]
By increasing the the heat, it increases the kinetic energy of molecules. 
6 0
3 years ago
etermine the molar concentration of magnesium ions in a solution formed by mixing 100.0 mL of 0.100 M MgCl, solution with 100.0
marysya [2.9K]

Answer:

Molar concentration of magnesium ions in the final solution is 0.2 M.

Explanation:

c=\frac{n}{V}

c = Concentration of the solution

n =   moles of the compound

V = volume of the solution in L

1) Molarity of MgCl_2 solution = 0.100 M

Volume of MgCl_2 solution = 100.0 mL = 0.1 L

Moles of MgCl_2 in 100 mL solution= n

0.100 M=\frac{n}{0.1L}

n=0.01 mol

MgCl_2(aq)\rightarrow Mg^{2+}(aq)+2Cl^-(aq)

1 mole of magnesium chloride gives 1 mol of magnesium ions and 2 moles of chloride ions.

Then 0.01 moles of magnesium chloride will give:

x=\frac{1}{1}\times 0.01 mol=0.01 mol magnesium ions.

2) Molarity of Mg_3(PO_4)_2 solution = 0.100 M

Volume of Mg_3(PO_4)_2 solution = 100.0 mL = 0.1 L

Moles of Mg_3(PO_4)_2 in 100 mL solution= n'

0.100 M=\frac{n'}{0.1L}

n'=0.01 mol

Mg_3(PO_4)_2(aq)\rightarrow 3Mg^{2+}(aq)+2PO_{4}^-(aq)

1 mole of magnesium phosphate gives 3 mol of magnesium ions and 2 moles of phosphate ions.

Then 0.01 moles of magnesium phosphate will give:

y=\frac{3}{1}\times 0.01 mol=0.03 mol magnesium ions.

After mixing both solutions:

Moles of magnesium ions = x + y = 0.01 mol + 0.03 mol = 0.04 mol

Total volume after mixing = 0.1 L + 0.1 L = 0.2 L

Molar concentration of magnesium ions in the final solution:[Mg^{2+}]

[Mg^{2+}]=\frac{0.04 mol}{0.2 L}=0.2 mol/L

4 0
4 years ago
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