Chemistry Test ...

From the rate expression for the following reaction, determine its order of reaction and the dimensions of the rate constant.

H₂O₂(aq)+3I⁻(aq)+2H⁺⟶2H2O(l)⁺I−₃;Rate=k[H₂O₂][I⁻]

An archaeologist unearths a bone sample and wants to know the age of the bone. Her chemist friend determines the 45.3% of the initial amount of carbon-14 is present in the bone sample. If the half-life of carbon-14 is 5730 yrs, calculate the age (in years) of the bone.

A substance 'A' decomposes by a first order reaction starting initially with [A]=2.00 M and after 200 min, [A] becomes 0.15 M . For this reaction, t_1/2 is

Arrhenius equation may not be represented as:

For the first-order decomposition reaction of N2O5 , it is observed that,

Which of the following is true?

What should be the age of the fossil for meaningful determination of its age?

Two substances A (t_1/2=5 min) and B (t_1/2=15 min) are taken in such a way that initially [A]=4[B] . The time after which both the concentration will be equal is : (Assume that reaction is first order)

In the start of summer, a given sample of milk turns sour at room temperature (27^oC) in 48 hour . In a refrigerator at 2oC , milk can be stored three times before it sours. For souring of milk, At 2^oC , the reaction is three times slower than at 27^oC . The activation energy of the souring of milk is (in kJ mol⁻¹) .

A + B → Product

If concentration of A is doubled, rate increases 4 times. If concentration of A and B are doubled, rate increases 8 times. The differential rate equation of the reaction will be

The rate constant for the reaction, 2N₂O₅→4NO₂+O₂ is 2×10^–5s^–1. If rate of reaction is 1.4×10^–5mol L^–1s^–1 , what will be the concentration of N₂O₅ in mol L^–1 ?