25. The reaction A → B+C is known to be zero order in A with a rate constant of 2.12 x 10 mol/Les at 25°C
a. Write the integrated rate law.
b. What time does it take for the concentration to reach 35% of the original?
C. If the original concentration was 0.0650 M, calculate the time it would take for 85% of this
concentration to be consumed.

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in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm