Answer:
A) The rate constant is 0.0078 s^-1
B) The order of the reaction is 1
Explanation:
A) Rate constant (k) = Rate ÷ final concentration
Rate = change in concentration/half-life
Initial concentration of reactant = 0.38 M
Half-life is the time taken for the reactant to decompose to half of its initial concentration = 129 s
Final concentration = 1/2 × 0.38 = 0.19 M
Change in concentration = 0.38 - 0.19 = 0.19 M
Rate = 0.19/129 = 0.0015 M/s
Rate constant (k) = 0.0015 M/s ÷ 0.19 M = 0.0078 s^-1
B) Rate = kC^n
n is the order of the reaction
0.0015 = 0.0078×0.19^n
0.19^n = 0.0015/0.0078
0.19^n = 0.19
Log 0.19^n = Log 0.19
nLog 0.19 = Log 0.19
n = Log 0.19/Log 0.19 = 1
A. The United States can produce enough food to feed all the people in the world. is your best answer, and is the only logical answer.
It is the only answer that actually has the word "food" in it, and is a direct result of farming technological advances.
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Answer:
The method involves students exhaling air using a plastic straw into the over-titrated acid-base mixture, which turned pink-colored with phenolphthalein indicator.
The freezing point would be 3.72 *C
