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kow [346]
3 years ago
14

What is a scientific theory?

Chemistry
2 answers:
rewona [7]3 years ago
3 0

Answer:

Explanation:

I'm guessing B)

I'm 86.7% sure that might be right.

alexdok [17]3 years ago
3 0

Answer:

A theory is a broad, natural explanation for a wide range of phenomena.

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How many feet are contained in .399 km
stiks02 [169]
1309.0551181 feet are contained in .399 km
7 0
4 years ago
Why is it important for scientists to use the scientific method?
shtirl [24]
I believe the answer is A
3 0
3 years ago
Which of the following is a polyatomic ion?<br> O A N₂<br> B. HCl<br> O C. S2<br> O D. PO43-
Alla [95]

Answer:

The answer is D..i.e phosphate. it consists of 1p and 4oxygen atoms

3 0
3 years ago
If you had a mixture of ethanol, glycerol, ethylene glycol, methanol, and water, how could you separate these five substances ou
leonid [27]

Fractional distillation

Explanation:

The best way to separate the mixtures out is through the process of fractional distillation.

In fractional distillation, liquid - liquid mixtures are separated based on the differences in boiling point of their components. Let us examine the boiling points of the component of the mixtures:  

     Ethanol                  78⁰C

     Glycerol                290⁰C

     Ethylene glycol     197.6⁰C

     Methanol               64.7⁰C

     Water                     100⁰C

We see that the liquids in the mixture have different boiling points. In this process, the mixture is heated in a distillation column. When the boiling point of any component is reached, it will rise up in the column and can be channeled to a condenser where it is cooled and collected.

The liquid with the least boiling point is first separated with the one with the highest boiling is recovered last:

   Order of recovery;

               Methanol               64.7⁰C

               Ethanol                  78⁰C

                Water                    100⁰C

               Ethylene glycol     197.6⁰C

                Glycerol                290⁰C

Learn more:

Physical properties brainly.com/question/10972073

#learnwithBrainly

3 0
3 years ago
Steroids, which all share the same carbon-ring framework but differ in functional groups that are attached to the basic ring str
lawyer [7]

Answer:

Lipids.

Explanation:

Steroids are known as the type of lipid which consists of 4 rings of carbon atoms. All steroids have 1 five-sided carbon ring and a 3 six-sided carbon ring. They are works as a hormone in the body and secreted by the ovaries and testes.

Steroids differ in functional groups. When this functional group attached to the steroid ring it gives steroids with a different function. They are composed of largely carbon, and hydrogen atoms. They are insoluble in nature in water.

8 0
3 years ago
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