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iragen [17]
4 years ago
15

Explain why substances with a lower boiling point are removed near the top of a petroleum fractional distillation tower.

Chemistry
1 answer:
Anon25 [30]4 years ago
6 0
The lighter components are able to rise higher in the column before they are cooled to their condensing temperature, allowing them to be removed at slightly higher levels.

I hope this helps
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20) Mg + O2 → MgO
jonny [76]

The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Hence option (1) is correct.

<h3>What is Synthesis reaction ?</h3>

Synthesis reactions are reactions that occur when two different atoms or molecules interact to form one molecule or compound.

It is also known as combination reaction

In the given reaction Mg and O combines with each other to form one product i.e, MgO. Hence, The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Thus, option (1) is correct.

Learn more about chemical reaction here ;

brainly.com/question/27948961

#SPJ1

7 0
2 years ago
The boiling point of ethanol is 78.3 degrees Celsius. The boiling point of
Scrat [10]

Answer:

K = 351.3

Explanation:

The relationship between the Celsius scale and kelvin scale is;

K = 273 + C

Since the Celsius temperature = 78.3

The kelvin temperature is given as;

K = 273  + 78.3

K = 351.3

8 0
3 years ago
The smallest unit of an element that maintains properties of that element is called a(n)
Mazyrski [523]

Answer:

try c atom i hope this helps!! : )

Explanation:

7 0
3 years ago
You find that the unknown powder contains the illegal drug cocaine. If someone where to ask you to determine the purity of the s
777dan777 [17]
The substance is not composed entirely of cocaine, it is mixed with other materials. The purity refers to what percentage of the powder is cocaine, and what percentage is other materials.
Purity can be important in crime investigations to find out the samples value, and to pair it with previously found samples of equal purity to deduce that they came from the same source.
7 0
4 years ago
During photorespiration, the phosphoglycolate (PGO) produced by RuBP oxygenation is eventually converted to phosphoglycerate (PG
timofeeve [1]

Answer:

<h2>4</h2>

Explanation:

1. Photorespiration occurs in plants and it is a wasteful pathway, it competes with the Calvin cycle. It begins when rubisco (Ribulose-1,5-bisphosphate carboxylase/oxygenase (RUBISCO) catalyzes both CO2 and O2 fixation) acts on O₂ instead of CO₂.

2. Photorespiration is initiated by the oxygenase activity of rubisco, the same enzyme that is also responsible for CO2 fixation.

3. Phosphoglycolate formed by O₂ fixation is recycled to the Calvin cycle intermediate phosphoglycerate in the photorespiratory pathway.

4. During oxygen fixation,1 molecule of PGA and 1 molecule of 2-phosphoglycolate are formed. The 2-phosphoglycolate  is converted back to PGA in the photorespiratory cycle.

4 0
4 years ago
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