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Len [333]
3 years ago
5

This is the an area drained by a river, stream, or other water source.

Chemistry
1 answer:
Alex17521 [72]3 years ago
7 0

Answer:

Watershed

Explanation:

A watershed is an area drained by a river, stream or other water sources.

  • Most water shed are usually separated from one another by a continental divide.
  • Such divides are extensive mountain ranges from which the rivers/streams takes their source.
  • They flow into their drainage basin usually the ocean most times.
  • Most watersheds are usually regions of good and fertile lands.
  • Watershed drains all the rivers and streams in an area.
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Answer:

1.022ppm is the unknown concentration of the metal

Explanation:

Based on Lambert-Beer law, the increasing in signal of a detector is directly proportional to its concentration.

The unknown concentration (X) produces a signal of 0.255

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0.99X + 1ppm produce 0.502, thus, X is:

0.255 * (0.99X + 1 / 0.502) =

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X =

1.022ppm is the unknown concentration of the metal

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