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vodomira [7]
3 years ago
9

The Scott Test is used when which drug is suspected?

Chemistry
2 answers:
hoa [83]3 years ago
8 0

Answer:

Cocaine

Explanation:

The Scott test is a presumptive, qualitative colorimetric test for the presence of cocaine that is carried out in the laboratory or on the field. It consists of 3 steps;

  • Suspected substance is mixed with cobalt thiocyanate in an aqueous/glycerin solution.
  • Acidification of the resulting solution using HCl.
  • Extraction of substance's precipitate using chloroform

<em>Blue organic phase indicates the presence of cocaine in substance while colourless organic phase indicates the absence.</em>

marishachu [46]3 years ago
4 0
It is a presumptive test for cocaine.
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5 0
3 years ago
Which represents the ionization of a strong electrolyte?
olga55 [171]
The answer is K3PO4(s) → 3K+(aq) + PO43–(aq) since water-soluble ionic tripotassium phosphate dissociates completely into K+ and PO43– ions when dissolved, that is, no K3PO4 remains in the solution. Carbonic acid H2CO3 and acetic acid CH3COOH are weak electrolytes since they are weak acids that do not completely ionize, while nonelectrolyte CH3OH do not dissociate into ions.
5 0
3 years ago
Read 2 more answers
The pressure inside a gas cylinder is 3,506 mmHg. How many atmospheres of pressure is the gas exerting on the cylinder?
PSYCHO15rus [73]
Below are the choices:

a)0.2168 atm 
<span>b)4.613 atm </span>
<span>c)34.60 atm </span>
<span>d467.4 atm 
</span>
1 atm = 760mmHg : Therefore: 
<span>3,506mmHg = 3,506/760 = 4.613 atm 
</span>B is correct answer. 

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
7 0
3 years ago
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A sample of an unknown compound has a percent composition of 52.14% carbon, 13.13% hydrogen, and 34.73% oxygen. Which compounds
Artemon [7]
<h3>Answer:</h3>

                The two possible compounds are;

                            1) Dimethyl Ether H₃C--O--CH₃

                           2) Ethanol  H₃C--CH₂--OH

<h3>Solution:</h3>

Step 1: Calculate Moles of each Element;

                      Moles of C  =  %C ÷ At.Mass of C

                      Moles of C  =  52.14 ÷ 12.01

                      Moles of C  =  4.341 mol


                      Moles of H  =  %H ÷ At.Mass of H

                      Moles of H  =  13.13 ÷ 1.01

                      Moles of H  =  13.00 mol


                      Moles of O  =  %O ÷ At.Mass of O

                      Moles of O  =  34.73 ÷ 16.0

                      Moles of O  =  2.170 mol

Step 2: Find out mole ratio and simplify it;

                C                                        H                                     O

            4.341                                 13.00                              2.170

     4.341/2.170                      13.00/2.170                    2.170/2.170

               2                                      5.99                                    1

               2                                        6                                       1

Hence,  Empirical Formula  =  C₂H₆O

<h3>Result:</h3>

         As the molecular mass of compound is not given therefore, we can assume and guess the empirical formula to be the molecular formula. Hence, possible compounds are,

                            1) Dimethyl Ether H₃C--O--CH₃

                           2) Ethanol  H₃C--CH₂--OH

3 0
3 years ago
A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.79 g/mL, 1.8
Pachacha [2.7K]

Answer:

(B) Her results are both precise and accurate.

Explanation:

In Chemistry, Accuracy refers to how close a measurement is to it's standard value or known value. On the other hand, Precision means how close two measurement are to each other regardless whether the results are accurate or not.

In the above question, all the above results are very close to each other. That's why the results are Precise to each other. All the results  are close enough to the actual value of the experiment. That's why the result are also accurate.

5 0
4 years ago
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