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Pavlova-9 [17]
3 years ago
10

PLEASEEEEE HELP ME ON QUESTION 8 ASAP!!!!!!!!!!!!!!!!!!! GIVING 20 POINTS

Chemistry
1 answer:
spayn [35]3 years ago
3 0

Answer:

I am pretty sure the correct answer is a reproductive system

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WHAT CAUSES THE MOVEMENT OF THESE AIR PARTICLES IN SOUND WAVES?
SVETLANKA909090 [29]
A vibrating string can create longitudinal waves as depicted in the animation below.



The answer is C) vibrations
8 0
3 years ago
At a certain temperature, this reaction establishes an equilibrium with the given equilibrium constant, Kc. 3 A ( g ) + 2 B ( g
cricket20 [7]

Answer:

The concentrations of A, B, and C at equilibrium:

[A] = 0.0 M

[B] =  2.7 M

[C] = 2.4 M

Explanation:

Concentration of 1.80 mol of A in 1.00 L container :

[A]=\frac{1.80 mol}{1.00 L}=1.80 M

Concentration of 3.90  mol of B in 1.00 L container :

[B]=\frac{3.90 mol}{1.00 L}=3.90 M

3A(g)+2B(g)\rightleftharpoons 4C(g), K_c=2.13\times 10^{17}

Initially

1.80 M        3.90 M                     0

At equilibrium

(1.80-3x)M     (3.90-2x)                       4x

The expression of an equilibrium constant is given by :

K_c=\frac{[C]^4}{[A]^3[B]^2}

2.13\times 10^{17}=\frac{(4x)^4}{(1.80-3x)^3\times (3.90-2x)^2}

Solving for x:

x = 0.600

The concentrations of A, B, and C at equilibrium:

[A] = [1.80-3x]=[1.80-3 × 0.600]= 0 M

[B] = [3.90-2x] = [3.90-2 × 0.600] = 2.7 M

[C] = [4x] =[4 × 0.600 M] = 2.4 M

6 0
3 years ago
Science question pleace answer!!
mylen [45]

Answer:

the humidity 80% at the temperature (20° C ) will have more water vapour because relative humidity is more at lesser temperature (20° C) and lower at higher temperature (40°C )

<em>i</em><em> </em><em>hope</em><em> </em><em>it</em><em> </em><em>helped</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>

6 0
3 years ago
In fractional distillation, liquid can be seen running from the bottom of the distillation column back into the distilling flask
shepuryov [24]

Answer:

substances with a higher boiling point are returning back to the flask which allows another substances with the specific context temperature (lower boiling point) to boil over and be purified.

Explanation:

The reason it happens because the lower boiling point substance vaporizes and crosses over while the other substance is waiting for its boiling point to reach

7 0
3 years ago
Burning charocal is that physical or chemical​
Arlecino [84]
Burning charcoal is a chemical reaction called combustion
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