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Dvinal [7]
3 years ago
12

The total amount of energy before and after a chemical reaction is the same. Therefore, energy is _____

Chemistry
2 answers:
ANTONII [103]3 years ago
5 0

Answer:

The total amount of energy before and after a chemical reaction is the same. Thus, energy is Question 14 options: the same as mass.

Explanation:

m_a_m_a [10]3 years ago
3 0

Answer:

You can also say Conserved

Explanation:

total amount of energy before and after the reaction is the same

Principal: the law of conservation of energy

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An alloy with an average grain diameter of 35 μm has a yield strength of 163 Mpa, and when it undergoes strain hardening, the gr
Lera25 [3.4K]

Answer:

\sigma_y\ =210.2\ MPa  

Explanation:

Given that

d= 35 μm ,yield strength = 163 MPa

d= 17 μm ,yield strength = 192 MPa

As we know that relationship between diameter and yield strength

\sigma_y=\sigma_o+\dfrac{K}{\sqrt d}

\sigma_y\ =Yield\ strength

d = diameter

K =Constant

\sigma_o\ =material\ constant

So now by putting the values

d= 35 μm ,yield strength = 163 MPa

163=\sigma_o+\dfrac{K}{\sqrt 35}      ------------1

d= 17 μm ,yield strength = 192 MPa

192=\sigma_o+\dfrac{K}{\sqrt 17}           ------------2

From equation 1 and 2

192-163=\dfrac{K}{\sqrt 17}-\dfrac{K}{\sqrt 35}

K=394.53

By putting the values of K in equation 1

163=\sigma_o+\dfrac{394.53}{\sqrt 35}

\sigma_o\ =96.31\ MPa

\sigma_y=96.31+\dfrac{394.53}{\sqrt d}

Now when d= 12 μm

\sigma_y=96.31+\dfrac{394.53}{\sqrt 12}

\sigma_y\ =210.2\ MPa

4 0
3 years ago
Which of the following can be considered evidence?
melomori [17]

Answer:

Shiny like a limousine

You're spending like a cash machine

Smile, show your golden teeth

That's how you cover up your cavities

You're glowing like a diamond ring

I saw you bought some other things

You're spending like a cash machine

To cover up your insecurities

Don't front, no needExplanation:

3455

5 0
3 years ago
Which location of the moon relative to the sun and earth may produce a warning (getting smaller nightly) half moon
scZoUnD [109]

Answer:

The moon to the direct right of the Earth relative to the Sun

Explanation:

6 0
3 years ago
Tell me answer........... fast ​
blondinia [14]
The answer will be 34
Hope you get it

7 0
3 years ago
Read 2 more answers
Calculate difference, ΔH-ΔE=Δ(PV) for the combustion reaction of 1 mole of heptane. (Assume standard state conditions and 298 K
Mamont248 [21]

Answer:

ΔPV = -9911 J

Explanation:

The combustion of 1 mole of heptane is:

C₇H₁₆(l) + 11O₂(g) → 7CO₂(g) + 8H₂O(l)

The change in number of moles of gas molecules is:

Δn = 7 moles products - 11 moles reactants = -<em>4 moles</em>

Using ideal gas ΔPV is:

ΔPV = ΔnRT

Where:

Δn is -4mol

R is 8,314472 J/molK

T is 298K

Replacing:

<em>ΔPV = -9911 J</em>

<em />

I hope it helps!

6 0
3 years ago
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