Consider the reaction: 8h2s(g)+4o2(g)→8h2o(g)+s8(g). δ[h2s]/δt = -0.033m/s. find δ[o2]/δt. δ[h2o]/δt. δ[s8]/δt. find the rate of the reaction.

Rate of the reaction = 0.004125 M/s

Explanation:

For a general reaction,

Rate of the reaction =

So, for the given reaction,

Rate of the reaction =

Calculation of [ΔO2]/Δt

Calculation of [ΔH2O]/Δt

Calculation of [ΔS8]/Δt

Calculation of Rate of Reaction

Rate of the reaction =

Rate of the reaction =

part 1: the half-life of the element is 22 years.

part 2: it will take 132.02 year for the sample to decay from 308.0 g to 4.8125 g.

explanation:

part 1: there are two ways to determine the half life time.

first way: the half life time can be determined directly from its definition as it is the time required for the sample to decay to its half concentration.

from the data the initial concentration was 45.0 g and decayed to its half value (22.5 g) in 22.0 years.

second way: the radio active decay is considered first order reaction so we can use the laws of first order reactions.

k = (1/t) ln (a/a-x), where k is the rate constant of the reaction,

t is the time of the reaction

a is the initial concentration of the reactant

a-x is the remaining concentration at time (t)

a = 45.0 g the initial concentration at t = 0 year.

at t = 22 year, a-x = 22.5 g

then k = (1/22 year) ln (45.0 g/ 22.5 g) = 0.0315 year-1.

the half-life time (t1/2) = ln 2/ k = 0.693/ k =0.693/ 0.0315 = 22 years.

part 2:

using the same law k = (1/t) ln (a/a-x),

using the given data; a = 308.0 g and a-x = 4.8125 g and the calculated k from the part 1 (k = 0.0315 year-1)

t = (1/k) ln (a/a-x) = (1/0.0315) ln (308.0/ 4.8125) = 132.02 years

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.