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The total volume after dilution is 50 mL + 150 mL = <<50+150=200>>200 mL = 0.2 L.
The moles of protein remain constant: 0.8 mol/L × 0.050 L = <<0.8*0.050=0.04>>0.04 moles.
Final concentration = 0.04 moles / 0.2 L = <<0.04/0.2=0.2>>0.2 M.
#### 0.2
A herpetologist tracks the population of a rare frog species in a Bornean rainforest. The population doubled in the first year due to conservation efforts but declined by 20% in the second year due to habitat loss. What was the overall percentage change in population over the two years?
Let the initial population be 100. After doubling: 100 × 2 = <<100*2=200>>200.
After
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