300 K তে একটি হিলিয়াম পরমাণু 2.40 xx 10^(2) ms^(-1) বেগ নিয়ে চলছে। ডি-ব্রোগলি তরঙ্গ...

A helium atom at 300 K is moving with a velocity of 2.40 xx 10^(2) ms^(-1) . The de-Broglie wavelength is about [At. Wt. of He=4.0]

The rate constant of the reaction, 2N_(2)O_(5) to 4NO_(2) + O_(2) at 300 K is 3 xx 10^(-5)s^(-1) . If the rate of the reaction at the same temperaturre is 2.4 xx 10^(-5) mol dm^(-3)s^(-1) , then the molar concentration of N_(2)O_(5) is

Identify the reaction order form each of the following rate constants: a. k = 7.06 xx 10^(-3) mol L^(-1) s^(-1) b. k = 5.6 xx 10^(-5) s^(-1) c. k = 1.25 xx 10^(-2) mol^(-1)l s^(-1) d. k = 1.25 xx 10^(-2) mol L^(2)s^(-1) e. k = 5.0 xx 10^(-6) atm^(-1)s^(-1)

The t_(1//2) of radioactive K-40 is 5.274 years (lambda = 2.5 xx 10^(-7) "min"^(-1)) . The decay activity of 2.0 g of the sample is about

For the reaction: CO(g) +H_(2)O(g) hArr CO_(2)(g) +H_(2)(g) (Delta_(r)H)_(300K) = 41.2 kJ mol^(-1) (Delta_(r)H)_(1200K) =- 33.0 kJ mol^(-1) (Delta_(r)S)_(300K) = -4.2 xx 10^(-2) kJ mol^(-1) (Delta_(r)S)_(1200K) =- 3.0 xx10^(-2) kJ mol^(-1) Predict the direction of spontaneity of the reaction at 300K and 1200K . also calculated log_(10)K_(p) at 300K and 1200K .

The rate constant of a reaction at 300 K is 1.6 xx 10^(-3) sec^(-1) and at 310K it is 3.2 xx 10^(-3) sec^(-1) the activation energy of the reaction approximately in kcals is

The velocity of a body of mass 10 gm is 2 xx 10^(4) ms^(-1) . The value of de - Broglie waavelenght associated with it will be

Identify the reaction order from each of the following rate. i) k=2.3 xx 10^(5) L mol^(-1)s^(-1) ii) k=2.3 xx 10^(5)Lmol^(-1)s^(-1) ii) k=3.1 xx 10^(-4)s^(-1)

A gas at 300 K has pressure 4 xx 10^(-10) N//m^(2) . IF k = 1.38 xx 10^(-23) J//K , the number of "molecule"// cm^(3) is of the order of

The mass of 0.5 dm^(3) of hydrogen at a pressure of 1 bar of Hg and at a temperature of 300 K was found to be 4.0 xx 10^(-2) g . Calculate the molar mass of hydrogen.