5000 cm³ (5L) of Cu(NO₃)₂ contain 10 moles
∴ 1000 cm³ of Cu(NO₃)₂ contain x moles
x = (1000 cm³ × 10 moles) ÷ 5000 cm³
∴ the concentration of the solution is2 mol/dm³ or 2 mol / L
1.1 / 2 = .7 --> 2.86 yrs
.7 / 2 = .45 —> 5.72 yrs
.45 / 2 = .225 —> 8.58 yrs
.225 / 2 = .1125 —> 11.44 yrs
So, for the sample of plutonium to reach .140 mg it should take a little less than 11.44 years.
Hope this helps
Ever since antibiotics were created, man has used them to kill off bacterial infections and other illnesses. These are often overused. Just like after you get sick from a "bug" you gain a resistance against that bug, the bacteria can develop a resistance too antibiotics. There are currently strains of e-coli thats resistant to antibiotics. This means that we can't use antibiotics to kill infections.
Answer:
No
Explanation:
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