Answer:
a. 0.31 g
Explanation:
- It is known that the decay of a radioactive isotope isotope obeys first order kinetics.
- Also, it is clear that in first order decay the half-life time is independent of the initial concentration.
- Half-life time is the time needed for the reactants to be in its half concentration.
- If reactant has initial concentration [A₀], after half-life time its concentration will be ([A₀]/2).
- The half-life time of the substance = 14 days.
<em>So, 70 days represent (70 days/ 14 days = 5.0 half-lives).</em>
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- So, the substance will decay:
10 g → (first half-life = 14 days) 5 g → (second half-life = 28 days) 1.5 g → (third half-life = 42 days) 1.25 g → (fourth half-life = 56 days) 0.625 g → (fifth half-life = 70 days) 0.3125 g.
<em>So, the right choice is: a. 0.31 g.</em>
I’m pretty sure The answer is B
All monomers have the capacity to form chemical bonds to at least two other monomer molecules. Polymers are a class of synthetic substances composed of multiples of simpler units called monomers.
Answer:
what?
Explanation:NAAAAAAAAAANNNIIIIIIIIIIIIIIIII
