The reaction: (ch3)3cbr + oh− → (ch3)3coh + br− in a certain solvent is first order with respect to oh−. in several experiments, the rate constant k was determined at different temperatures. a plot of ln(k) vs 1/t was constructed and the slope of the line was -1.10 x 104 k with a y-intercept of 33.5. what is the value for k at a temperature of 25°c? a. 3.69 × 10-7 s-1 b. 3.51 s-1 c. 3.23 × 10-2 s-1 d. 1.10 × 104 s-1

C

Explanation:

This is the Arrehnius equation in lineal form, lnK = -Ea/RT + lnA.

so the slope corresponds to -Ea/R and the intercept is lnA. So from the slope we can calculate the Ea Ea=-(-1.10*10^4)*8.314=9.1*10^4 J/lol

A=e^(33.5)=3.53*10^14

Finally with these values and using the Arrehnius equation we can calculate K at 25°C.

k=Ae^-(Ea/RT)

k=(91.06)e^-(9.1*10^4/(8.314*298))

k=3.23*10^-2

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.