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Pani-rosa [81]
3 years ago
5

A sample of ink is put in the center of filter paper . Several drops of ethanol are then put on the ink mark. Two concentric rin

gs of circle are obtained. What is the best conclusion about the ink we can come to? a. It contains two colored substance only b. It contains at least two coloured substances c. It is a compound d. It is broken down by ethanol
Chemistry
1 answer:
Rus_ich [418]3 years ago
8 0

Answer:

The correct option is;

b. It contains at least two colored substances

Explanation:

In chromatography, a mixture is separated into its components, such that in the filter paper, on which the drops of ethanol are then placed on the ink mark, we have different phases of the components of the mixture that have different levels of mobility by capillary action through the filter paper.   Therefore, given that two concentric rings of circles are obtained, we have that each ring is composed of a different component of the mixture and there are therefore, at least two colored substances.

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What is the connection between iozination energy, electronegativity, and electron affinity of elements
vivado [14]

Answer:

Explanation:

The three of them increase from left to right across the periods of the periodic table, and at the same time, they decrease from up to down across the groups of the periodic table.

Ionization Energy is defined as the energy required to remove the atom of an electron.

Electron affinity is defined as the change in energy when electron is added to a negative ion.

Electronegativity is the ability of an atom to attract other atoms to itself.

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3 years ago
Please help time is of the essence:
Juliette [100K]
The Indicator changes color in a titration is Indicator Point 
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Be sure to answer all parts. Consider the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g)ΔH = −198.2 kJ/mol How would the concentrations of S
andrew-mc [135]

Answer:

a)

[SO2]: The concentration increases

[O2]: The concentration increases.

[SO3]: The concentration decreases.

b)

[SO2]: The concentration decreases.

[O2]: The concentration decreases.

[SO3]: The concentration increases.

c)

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[O2]: There is no change.

[SO3]: There is no change

Explanation:

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4 0
3 years ago
An atom has at least one positive proton and at least one negative electron. Which of the following is true about the protons an
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Answer:

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6 0
3 years ago
Read 2 more answers
The car has a mass of 1200kg. The car has a forward force of 3400N but friction has a force of 400N going against it. What is th
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The acceleration of the car : 2.5 m/s²

<h3>Further explanation</h3>

Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object  

∑F = m. a  

<h3 />

Mass of the car = 1200 kg

Forward force = 3400 N

Friction force = 400 N

The direction of motion of the friction force will be opposite to the forward force, so that both of them can be subtracted to get the value of the net force (net force: combination / sum of all forces acting on an object)

\tt \sum F=3400-400=3000~N

So the acceleration :

\tt a=\dfrac{\sum F}{m}\\\\a=\dfrac{3000}{1200}\\\\a=2.5~m/s^2

6 0
2 years ago
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