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mariarad [96]
4 years ago
7

_______ investigations never involve hypothesis.

Chemistry
2 answers:
Elena-2011 [213]4 years ago
6 0
Experimental investigations 
umka2103 [35]4 years ago
3 0

Answer: Descriptive

Explanation:

A descriptive investigation can be define as the scientific process which does involves a claim or question but it does not involve a hypothesis. In this the observations are recorded, here no variables are manipulated, also there is no comparison between the variables takes place.

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Above question is incomplete. Complete question is
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Reaction involved in present nuclear event is 
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In above nuclear reaction, atomic mass number of Os is missing. The atomic mass number of Os = 175 - 4 = 171

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