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Murljashka [212]
3 years ago
12

Enter your answer in the provided box.

Chemistry
1 answer:
nalin [4]3 years ago
3 0

Answer:0.81M

Explanation: from NaCl concentration c(Cl-) = 0.27 M and from

MgCl2 c(Cl-) = 0.54 M, because there comes twice as much chloride ions.

add concentrations together c= 0.81 M

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Calculate the pressure of 2.50 Liters of a gas at 25.0oC if it has a volume of 4.50 Liters at
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Answer:

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Explanation:

Given that:

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Temperature (T1) = 298 K

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at standard temperature and pressure;

Pressure (P1) = 1 atm

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Pressure P2 = ??

Using combined gas law:

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For the reaction N2O4(g) ⇋ 2NO2(g), Kc = 0.25 at 98°C. At a point during the reaction, the concentration of N2O4 = 0.50 M and th
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Answer:

Q = 0.50

No

Left

Explanation:

At a generic reversible equation

aA + bB ⇄ cC + dD

The reaction coefficient (Q) is the ratio of the substances concentrations:

Q = \frac{[C]^c*[D]^d}{[A]^a*[B]^b}

Solids and liquid water are not considered in this calculus.

When the reaction achieves equilibrium (concentrations are constant), the Q value is named as Kc, which is the equilibrium constant of the reaction. If Q > Kc, it indicates that the concentration of the products is higher, so, the reaction must progress to the left and form more reactants; if Q < Kc, than the concentrations of the reactants, are higher, so, the reaction progress to the right.

In this case:

Q = \frac{[NO_2]^2}{[N_2O_4]}

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