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1. ### For the reaction: 2N2O5(g) → 4NO2(g) + O2(g) the rate law is: d[O2]/dt = k[N2O5] How to calculate half-life?

...rate constants are related to the half-life of the reaction by k = ln 2 / half-life. So, at 300 K, k = (ln 2) / 2.50X10^4 = 2...

2 Answers · Science & Mathematics · 14/06/2019

2. ### Found my favorite K names for a boy!! ?

I love K names! #1 Kenton #2 Korbin #3 Keaton #4 Karson #5 Karter #6 Keegan

8 Answers · Pregnancy & Parenting · 14/11/2019

3. ### The half-life for the reaction below was determined to be 2.14 × 104 s at 800 K.?

From the first half life, calculate the rate constant as k = ln 2 /t1/2 k1 = ln 2 / 2.14X10^4 = 3.24X10^-5 s^-1 Now...

1 Answers · Science & Mathematics · 10/06/2019

4. ### You have a sample of a gaseous compound which has a density of 8.51g/L at 52.0 Celsius and 88.6 k/Pa. What is the molar mass of the gas?

8.51g/L at 52.0 Celsius and 88.6 k/Pa. <<< did you mean...

4 Answers · Science & Mathematics · 28/07/2019

5. ### Simplify this expression: (2k^2 + k + 5) - (8 + 4k - k^2)?

Distribute the negative, Then, add like items. (2k^2 + k + 5) - (8 + 4k - k^2) (2k^2 + k + 5) - 8 - 4k + k^2 3k² -3k -3

5 Answers · Science & Mathematics · 14/02/2019

6. ### so how will the U.K. exiting the European union affect the EUROPEAN UNION? and vice versa?

The U.K will be engrossed in it's own agenda . Cant speak for the E.U .

4 Answers · Travel · 28/11/2019

7. ### A first order reaction: Given k =0.784 hr-1 . Given that the system started with 0.550 M , what concentration remains 25.0 min?

... during the reaction = 25 min. A1 = concentration of the reactant at time t, = ? K = velocity constant = 0.784hr^-1 = 0.013 min^-1 Rearranging the abobve equation...

2 Answers · Science & Mathematics · 08/02/2019

8. ### what must be the value of k?

y = 4x - 8 The inverse is: x = 4y - 8 x + 8 = 4y y = (x + 8) / 4 y = (1/4)x + 2 So k = 2

3 Answers · Science & Mathematics · 28/08/2019

9. ### A helium-filled balloon at 310.0 K and 1 atm, contains 0.25 g He, and has a volume of 1.41 L.?

Δq = (20.8 J/mol K) x (0.25 g He / (4.0026 g He/mol)) x (310.0 K - 230.0 K...

1 Answers · Science & Mathematics · 10/05/2019

10. ### which of the following values does the series sigma of k=0 to infinity of 1/((4^k)k!) represent?

https://www.wolframalpha.com/input/?i=sum(1%2F(4%5E(k)+*+k!)+,+k+%3D+0+,+k+%3D+infinity) e^(1/4)

2 Answers · Science & Mathematics · 07/06/2019