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AleksandrR [38]
4 years ago
11

Pleeaase!!!! this is due by midnight and I’m SOOOOOOO confused

Chemistry
1 answer:
Savatey [412]4 years ago
6 0
Meteor is the flash of light caused rock debris we see from space.
Meteoroid is the debris.
Meteorite is the debris that lands on earth.
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What kind of system is the carbon cycle
natita [175]

Answer:

The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.

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4 years ago
Which of the following is NOT needed for the formation of coal from plant remains?
julsineya [31]
The answer is letter A, bacterial decay.
7 0
2 years ago
t 745 K, the reaction below has an equilibrium constant (Kc) of 5.00 × 102. H2 (g) + I2 (g) ⇌ 2 HI (g) If a mixture of 0.10 mol
spayn [35]

Answer : The concentration of HI (g) at equilibrium is, 0.643 M

Explanation :

The given chemical reaction is:

                        H_2(g)+I_2(g)\rightarrow 2HI(g)

Initial conc.    0.10        0.10      0.50

At eqm.        (0.10-x)  (0.10-x)   (0.50+2x)

As we are given:

K_c=5.00\times 10^2

The expression for equilibrium constant is:

K_c=\frac{[HI]^2}{[H_2][I_2]}

Now put all the given values in this expression, we get:

5.00\times 10^2=\frac{(0.50+2x)^2}{(0.10-x)\times (0.10-x)}

x = 0.0713  and x = 0.134

We are neglecting value of x = 0.134 because the equilibrium concentration can not be more than initial concentration.

Thus, we are taking value of x = 0.0713

The concentration of HI (g) at equilibrium = (0.50+2x) = [0.50+2(0.0713)] = 0.643 M

Thus, the concentration of HI (g) at equilibrium is, 0.643 M

8 0
4 years ago
Does anyone know if these are correct? if not can anyone tell me what the answers are?
Stells [14]

Answer:

16. correct

17. correct

18. correct

19. correct

4 0
3 years ago
Three moles of an ideal gas undergo a reversible isothermal compression at temperature 18.0 ?c. during this compression, an amou
Lena [83]
We calculate the entropy of an ideal gas follows:

<span>For an isothermal compression, change in internal energy is equal to zero.</span>
<span>Thus, the heat added to the gas is equal to the work done on the gas which is given as 1750 J.</span>

<span>Entropy would be 1750/301 = 5.81 J/K </span>
3 0
3 years ago
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