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bija089 [108]
3 years ago
15

Christy is a forensic scientist. She is given

Chemistry
1 answer:
Nitella [24]3 years ago
6 0

Answer:

The white powder is not sugar, so Christy's hypothesis is incorrect . Christy's next step should be to identify substances that have the measured molecular mass.

Explanation:

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n = 4
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mℓ<span> = -3</span>
ms<span> = -½</span>
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In the reaction of a carbonyl compound with silver cyanide, the lone pair of electrons on the nitrogen are the one that attack t
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3 years ago
What is the equivalent mass of HBr in a complete neutralization reaction?
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6 0
3 years ago
Which of the following describe chemical(not physical) changes?
lesantik [10]

HERE IS THE COMPLETE QUESTION;

Which of the following describe chemical (not physical) changes?

a) a spoonful of table salt dissolves in a bowl of soup.

b) the growth of plants depends upon the sun's energy in a process called photosynthesis.

c) a flashlight beam slowly gets dimmer and finally goes out due to a dying battery.

d) the helium gas inside a balloon tends to leak out after a few hours.

e) frozen orange juice is reconstituted by adding water to it.

<em>The correct statements that answer the question are;</em>

<em />

  • the growth of plants depends upon the sun's energy in a process called photosynthesis.

  • a flashlight beam slowly gets dimmer and finally goes out due to a dying battery.

  • Chemical changes can be regarded as one that takes place when  there is occurrence of chemical reactions

  • The reaction in chemical change involve   formation of new chemical elements or formation of new  compounds .

  • Physical changes can be regarded as changes that does  not lead to  formation of new chemical substances

  • the growth of plants here can be regarded as chemical change this is because there is formation of new product, and the sun's energy  this process is as a result of  photosynthesis which is a chemical process

  • <em>When a  flashlight beam and started  gets dimmer a</em>nd  then goes out, this is because of  dying battery is chemical process, the battery contains some chemical elements and there is chemical reaction going.

  • When the helium gas that is inside a balloon  leak out, it is considered a physical process , no reaction has occurred.

<em>Therefore, Chemical changes can be regarded as one that takes place when  there is occurrence of chemical reactions </em>

Learn more at : brainly.com/question/23693316?referrer=searchResults

6 0
3 years ago
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