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nignag [31]
3 years ago
9

The internal energy of a substance Is called​

Chemistry
1 answer:
Gennadij [26K]3 years ago
4 0

Answer:

The internal energy is the total amount of kinetic energy and potential energy of all the particles in the system. ... When the substance melts or boils, energy is put in to breaking the bonds that are holding particles together, which increases the potential energy.

Explanation:

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I need help on this one plizz help me
Aleksandr-060686 [28]
Multiply,
moles * molar mass = mass
5 0
3 years ago
Calculate the standard enthalpy of formation of carbon disulfide (CS2) from it's elements, given that C(graphite) + O2(g) → CO2(
ch4aika [34]

Answer:

Standard enthalpy of formation of Carbon disulfide CS2 = 87.3 KJ/mol

Explanation:

forming CS2 means that it should in the product side

C(graphite) + O2 → CO2                  ΔH = -393.5

2S(rhombic) + 2O2 → 2SO2            ΔH = -296.4 x 2

CO2 + 2SO2 → CS2 + 3O2             ΔH = -1073.6 x -1

the second reaction is multiplied by 2 so that the SO2 and O2 can cancel out.

the third reaction is reversed (multiplied by -1) so that CS2 will be on the product side.

after adding the reaction and cancelling out similarities, the final reaction is: C(graphite) + 2S(rhombic) → CS2

Add ΔH to find the enthalpy of formation of CS2

ΔHf = (-393.5) + (-296.4 x 2) + (-1073.6 x -1) = 87.3 KJ/mol

be aware of signs

3 0
3 years ago
Compare and contrast the two upper layers of the mantle.
allsm [11]
<span>The lithosphere is mostly made of Earth's outer layer, the crust, and the upper portion of Earth's mantle. The asthenosphere is the upper part of Earth's mantle "which is also the middle layer of Earth".

Hope This Helps!
</span>
6 0
3 years ago
Read 2 more answers
Determine the molar mass of H2O2 (the solute) in a 1.5M aqueous solution of H2O2
Lera25 [3.4K]

Answer:

The molar mass of  H₂O₂ (the solute) in the aqueous solution of

H₂O₂ is 51 g

Explanation:

Given;

H₂O₂ compound

Concentration of aqueous solution of H₂O₂ = 1.5M

The molecular mass of H₂O₂ = (1 x 2) + (16 x 2) = 34 g/mol

Concentration(M) = \frac{Reacting \ mass \ (g)}{Molar \ mass \ (g/m)}

Reacting mass (g) = Concentration x Molar mass

Reacting mass (g) = 1.5 x 34

Reacting mass (g) = 51 g

Therefore, the molar mass of  H₂O₂ (the solute) in the aqueous solution of

H₂O₂ is 51 g

3 0
3 years ago
The [H+] is 0.001 M. What is the pH?
galina1969 [7]
Hopes this helps:

Answer: So the pH of the solution is 4.
7 0
3 years ago
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