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BigorU [14]
3 years ago
14

List 2 everyday situations in which it would be useful to identify unknown substances.

Chemistry
1 answer:
charle [14.2K]3 years ago
7 0
TESTS USED- 
Spectroscopic method is used to determine unknown substances found in wildlife waters.

IMPORTANCE-
<span>To control the quality of fish.

</span>TESTS USED -
Blood or urine tests are used for analysis
Gas chromatography is the most common method of chemical analysis


IMPORTANCE -
<span>to avoid cheating in sports</span>
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<h3>Answer:</h3>

52 mm

<h3>Explanation:</h3>

We are given;

  • 5.2 cm of magnesium

Required to convert it to cm

We are going to use the appropriate conversion factor;

  • The units used to measure length include;

Kilometer(km)

10

Hectometer (Hm)

10

Decameter (dkm)

10

Meter(m)

10

Decimeter (dm)

10

Centimeter (cm)

10

Millimeter (mm)

Therefore; the appropriate conversion factor is 10mm/cm

Thus;

5.2 cm will be equivalent to;

= 5.2 cm × 10 mm/cm

= 52 mm

Therefore, the length of magnesium ribbon is 52 mm

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Explanation:

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