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AfilCa [17]
3 years ago
13

If a chemist wants to do a presumptive test on an unknown substance for the presence of cocaine, which test reagent should they

use?
Medicine
1 answer:
marysya [2.9K]3 years ago
6 0
Marquis reagent is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It is composed of a mixture of formaldehyde and concentrated sulfuric acid, which is dripped onto the substance being tested.
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a researcher is conducting written surey- which of the following is the most important issue thast a researcher addressed in pla
CaHeK987 [17]

The most important issue that a researcher addresses in planning the research is the confidentiality of the individual subject's responses.

<h3>What is Research?</h3>

Research may be defined as the process of methodical examination into and investigation of materials and references in order to demonstrate attributes and acquire unexplored conclusions.

Confidentiality in research is when a researcher preserves the attributes of his subject's personal and secret and permits no one to have credentials to it.

Anonymous details are usually the most reasonable and leisurely method to glorify and brag about confidentiality in the research investigation.

The complete question is as follows:

A researcher is conducting a written survey about people's attitudes toward walking as an exercise option at the local shopping mall that supports a walking program. The survey is anonymous (without codes, names, or other information) and subjects may complete the survey and place it in a box at the shopping mall exits. Which of the following is the most important issue that the researcher addressed in planning the research?

  • Confidentiality of the individual subject's responses
  • Breach of confidentiality
  • Less predictable

Therefore, the correct option is A, i.e. Confidentiality of the individual subject's responses.

To learn more about Research, refer to the link:

brainly.com/question/968894

#SPJ1

3 0
2 years ago
So my dog just ate chocolate and I am really scared please tell me if I should be worried.
Sholpan [36]

Yes, be concerned. My dog died because of chocolate.

8 0
3 years ago
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Which BEST explains why a patient who had a myocardial infarction will never recover, in spite of all the drugs prescribed to hi
Bas_tet [7]

Answer:

The answer correct aaaaa

6 0
3 years ago
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What course of action should you take if you were placed on exclusion list
Natali [406]

Explanation:

Report if you have been placed on any state or federal exclusion lists, including the U.S. Department of Health and Human Services Office of Inspector General (OIG) and/or General Services Administration (GSA); or if any of your employment-related professional licenses have expired, or been revoked and/or sanctioned.

7 0
3 years ago
I NEED HELP IM STUCK!!!
slamgirl [31]
OSHA occupational safety and health administration
CDC Center for disease control
CLIA ..... I am unsure what this stands for.
Immunity... when you’re body protects you from a infection or disease. Natural immunity is when you get sick and recover. Your body makes T cells so If you are exposed to the infection again the T cell remember and fight the infection. Herd immunity is when most people in the community has had the virus or infection. Keeps the infection from spreading in that area because most people are already immune to it.

Behaviors that promote health and wellness. Eating healthy, not smoking, exercising.

Eating healthy can prevent disease. Not eating processed foods that are high in fat, fried foods lower risk of heart attack, cancer, ect.
3 0
3 years ago
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