Question

Question 5:
The reaction A(aq) → B(aq) is a first order reaction with respect to A(aq). The concentration of A(aq) is reduced from 0.822 M to 0.576 M in 3.16 minutes. What is the half-life, in seconds, of this reaction?

Question 6:
The reaction A(aq) → B(aq) + C(aq) is a first order reaction with respect to A(aq). The half-life of A(aq) is 93.2 s at 25.0^oC and its half-life is 60.9 s at 75.0^oC. What is its half-life at 50.0^oC?

Question 7:
The reaction A(aq) → 2 B(aq) is a second order reaction with respect to A(aq). Its activation energy is 46.0 kJ/mol. When the concentration of A(aq) is 0.100 M and the temperature is 25.0^oC, the rate of reaction is 0.333 M/s. What is the rate of reaction when we increase the concentration of A(aq) to 0.257 M and we raise the temperature to 53.7 ^oC?

Question A:
In the Sr²⁺ cation, in its ground state, how many electrons have both m_l = 0 and s = -1/2 ?

Answer 1