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laiz [17]
4 years ago
11

Is #25 balanced correctly? If not please help

Chemistry
2 answers:
Afina-wow [57]4 years ago
3 0
Yes it is correctly balanced. :) 
dezoksy [38]4 years ago
3 0
It is already correct balanced equation!
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3 years ago
Unit 1- Unit Assessment (Matter & Density)
konstantin123 [22]

Answer:

<h3>The answer is 11 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 3025 g

volume = 275 mL

We have

density =  \frac{3025}{275}  \\

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<h3>11 g/mL</h3>

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7 0
3 years ago
The free flow of electrons is responsible for
noname [10]

Answer:

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3 years ago
3.0 kg of nitrogen gas in a piston cylinder device initially at a temperature of 300 K and a pressure of 100 kPa is compressed t
lutik1710 [3]

Answer:

ΔU = 103.54 KJ

Explanation:

∴ ΔU = Q + W

ideal gas:

∴ PV = nRT

∴ R = 8.314 L.KPa/K.mol

∴ n = 3000 g N2 * ( mol/28.0134g N2) = 107.143 mol N2

∴ m N2 = 3.0 Kg

∴ T1 = 300 K

∴ P1 = 100 KPa

∴ V1 = nRT1/P1 = 2672.36 L = 2.67 m³

⇒ V2 = 0.9*V1 = 2405.12 L = 2.41 m³

∴ P2 = 140 KPa

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⇒ W = P1V1 - P2V2

⇒ W = ((100KPa)*(2.67m³)) - ((140KPa)*(2.41m³))

⇒ W = - 70.164 KJ

∴ Q = nCpΔT

∴ Cp = (5/2)*R = 20.785 J/mol.K ....ideal gas

⇒ Q = (107.143mol)*(20.785 J/mol.K)*(378 - 300)

⇒ Q = 173703.446 J = 173.703 KJ

⇒ ΔU = 173.703 KJ - 70.164 KJ

⇒ ΔU = 103.54 KJ

3 0
3 years ago
Select the correct answer.
cupoosta [38]

Answer:

A.

as the sum of the energy of the products and the energy of the reactants.

Explanation:

Because the sun is on top of the energy.

3 0
3 years ago
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