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1. ### Whats Vitamin K responsible for?

Vitamin K aids in blood clotting: when the body is injured, vitamin... before surgery to prevent excessive bleeding. Vitamin K also helps the body absorb calcium and it has been suggested...

4 Answers · Science & Mathematics · 06/09/2010

2. ### Help finding k?

Help finding k? For the first-order decomposition of N2O5 at a high temperature...keep getting it wrong and Idk how. ln(.32/.88)=-k175 ln(.32/.88)/175=-k\ k=5.78 x 10^-3 but the answer is 3.31 X 10^-3...

2 Answers · Science & Mathematics · 09/07/2014

3. ### What is the rate constant k for this reaction ?

Rate = k * [NO]^m * [H2]^n 0.00123 = k * 0.1^m * 0.1^n -------------------(1) 0.00246 = k * 0.1^m * 0.2^n -------------------(2) 0.00492 = k * 0.2^m * 0.1^n -------------------(3) Divide (1) by (2) 0.00123/0.00246 = k...

3 Answers · Science & Mathematics · 06/02/2007

4. ### Rates of Reaction, calculating k?

if you start with... -d[A] / dt = k x [A]² x [B] x [C] we need to get...] + 1/9 [A]² and then... -d[A] / dt = k x [A]² x [B] x [C] becomes...

1 Answers · Science & Mathematics · 27/10/2010

5. ### What does K, the rate constant mean in chemistry?

the "k" is the constant we insert to solve the proportionality... read on ***** the...constant to make the equation an equality. In this case, the constant is k and.. rate α [A] becomes... rate = k x [a] now because we have...

1 Answers · Science & Mathematics · 20/09/2012

6. ### calculate k?

If you define K for the first reaction as K1 and for the second as K2..., thus it will be the same as dividing by K2. So K for your final reaction will be: (0.0334)^2 / 2.35 = 4.75 * 10^-4

2 Answers · Science & Mathematics · 12/05/2007

7. ### When looking at the relationship between K and Q...?

K is the equilibrium constant for a reaction and Q is the reaction quotient.... Suppose you have a reaction A<-->B K = [B]/[A] when the reaction is at equilibrium. If K...

1 Answers · Science & Mathematics · 01/05/2016

8. ### How much energy must to be removed from a 94.4 g sample of benzene (molar mass=78.11 g/mol) at 322 K?

At 322 K, benzene is still a liquid, but it freezes at 279 K...lost at the three regimes: a) (94.4 g) x (1.73 J/g*K) x (279 K - 322 K) = - 7.02 kJ b) - (9.8 ...

2 Answers · Science & Mathematics · 28/09/2010

9. ### At a particular temperature, K = 3.88 for the reaction below. SO2(g) + NO2(g) equilibrium reaction arrow SO3(g?

Your equation for K is: K = { [SO3] [NO] } / { [SO2] [NO2...as the reaction proceeds toward equilibrium. Plug into the equation for K all your starting values and let x represent the concentration change...

3 Answers · Science & Mathematics · 18/02/2013

10. ### Estimate the wavelength of the Kα X-ray in scandium?

Kα radiation comes from the emission of a photon that occurs when an excited atom with a "hole...square of a quantity one less than the atomic number of the element in question (atomic number minus 1)." K-alpha for scandium (Z = 21) is thus estimated as (10.2 eV)(20)² = 4080 eV...

3 Answers · Science & Mathematics · 22/04/2010