Chemical Kineti...

For an elementary reaction $$X(g)\rightarrow Y(g) +Z(g)$$, the half-life period is $$10$$ min. In what period would the concentration of $$X$$ be reduced to $$10\%$$ of original concentration? 

$$A + B \longrightarrow C; \Delta H = + 60 KJ/mol$$
$$E_{at}$$ is $$150$$ kj. What is the activation energy for the backward reation?

An endothermic reaction $$A \rightarrow B $$ have an activation energy 15 kcal/mol and the heat of reaction is 5 kcal/mol. The activation energy of the reaction  $$B \rightarrow A $$ is:

What is the half - life of a radioactive substance if $$75\%$$ of any given amount of the substance disintegrates in $$60$$ minutes?

What fraction of a reactant showing first order remains after 40 minute if $$t_{1/2}$$ is 20 minute?

Let there be as first-order reaction of the type, $$ A\rightarrow B+C $$. Let us assume that only A is gaseous. We are required to calculate the value of rate constant based on the following data.

Two identical balls A & B having velocity of 0.5 m/s & -0.3 m/s respectively. colloid elastically in 1-0. The velocity of A & B after collision will be?

$$99\%$$ of a first - order reaction was completed in $$32$$ min When will $$99.9\%$$ of the reaction complete?

A carbon sample from the frame of picture gives 7 counts of $$C^{14}$$ per minute per gram of carbon. If freshly cut wood gives 15.3 counts of $$C^{14}$$ per minute, calculate the age of frame. ($$t_{1/2} \ of  \ C^{14}$$ = 5570 years)

$$K_{34^{\circ}\ C} : K_{35^{\circ}\ C} < 1$$, then: