B. she can ask people about their backgrounds
This requires listening, the rest do not
Answer:
hello? are you still here? reply if you are
If you look on Quizlet it will help you but to save you the hassle the answer is Iron.
Answer:
k = 4.85 x 10⁻³ / s
Explanation:
For a first order reaction we have two very important equations we need to memorize:
ln ( N/N₀ ) = -kt
and,
0.693/ k = t₁/₂
where k is the rate constant and t i is the halflife which can be derived from the first equation.
0.693/ k = t₁/₂ ⇒ k = 0.693 / t₁/₂
k = 0.693 / 143 s = 4.85 x 10⁻³ / s
