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1. ### For the reaction of A + B ↔ 2C, if K = 64.5 and A and B are both initially 0.200 M, what is the equilibrium concentration of product C ?

...x E      0.200 - x      0.200 - x                       2x           k = [ C ]/([A][B]) = 64.5           k = (2x)^2/[( 0.200 - x)( 0.200 - x)] = 64...

3 Answers · Science & Mathematics · 28/03/2021

2. ### The reaction PCl5(g) <--> PCl3(g)+Cl2(g) has a K =85.0 at 760° C .?

a) K = [PCl3][Cl2]/[PCl5] = 85 Let x = [PCl3...

1 Answers · Science & Mathematics · 10/04/2021

3. ### The decay of Iridium-192 which is a first-order reaction with a half-life of 74 days?

..., where A is the amount of iridium-192. ==== b. Rate constant, k = ln(2)/t½ = ln(2)/(74 days) = 0.009367 day⁻¹ ≈ 0.00937 day⁻¹ ==== c . No. of half-lives = (5 × 365.25 days) / (74 days) = 24...

1 Answers · Science & Mathematics · 24/03/2021

4. ### chemistry homework help please?

...atm) x (12.0 L) / ((4.00 mol x (0.082057366 L atm/ K mol)) = 204.7 K = - 68.4 ° C 3. P = nRT / V = (3 mol) x (0.082057366 L atm/ K ...

1 Answers · Science & Mathematics · 16/04/2021

5. ### A sample of gas has an initial pressure of 1.50 atm at a volume of 3.40 L at a temperature of 20.0° C . ?

(3.40 L) / (20.0 + 273.15) K x (20.0 + 10.0 + 273.15) K x (1.50 atm / 2.50 atm) = 2.11 L

4 Answers · Science & Mathematics · 26/03/2021

6. ### A ten-liter gas cylinder contains 55 moles nitrogen. What pressure, in kPa, is exerted by the nitrogen at 25° C ? ?

...have: V = 10.0 L n = 55 mol T = 25.0 oC = (25.0+273) K = 298K we have below equation to be used: P * V = n...

1 Answers · Science & Mathematics · 25/03/2021

7. ### An unknown gas at 25.1 ∘ C and 1.05 atm has a molar mass of 30.07 g/mol. Assuming ideal behavior, what is the density of the gas?

n/V = P / RT = 1.05 atm / ((0.082057366 L atm/ K mol) x (25.1 + 273.15) K ) = 0.042903 mol/L (0.042903 mol/L) x (30.07 g/mol) = 1.29 g/L

1 Answers · Science & Mathematics · 15/04/2021

8. ### If 39.5 mol of an ideal gas is at 3.61 atm at 10.30 ∘ C , what is the volume of the gas?

... know all so to solve for V, you must put temperature in degrees K  (283.45K) and use an R in units of L-atm/deg-mol...

3 Answers · Science & Mathematics · 18/04/2021

9. ### A 9.00 L container holds a mixture of two gases at 41 ° C . The partial pressures of gas A and gas B, respectively, are 0.355 atm and 0?

P = nRT / V = (0.200 mol) x (0.082057366 L atm/ K mol) x (41 + 273) K / (9.00 L) = 0.5726 atm of third gas 0.355 atm + 0.817 atm + 0.5726 atm = 1.74 atm total

1 Answers · Science & Mathematics · 15/04/2021

10. ### Calculate the density, in grams per liter, of a gas at STP if 2.72 L of the gas at 10.2 ∘ C and 716.4 mmHg weighs 0.354 g.?

... = (716.4 mmHg) x (2.72 L) / ((62.36367 L mmHg/ K  mol) x (10.2 + 273.15) K ) = 0.110273 mol (0.354 g) / ((22.414 L/mol...

1 Answers · Science & Mathematics · 18/04/2021