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Damm [24]
3 years ago
9

Help please...........

Chemistry
1 answer:
abruzzese [7]3 years ago
4 0
Ummm better pic ??? Plz
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Describe the differences in the tlc of the reaction mixture before heating and after heating and explain the observed change in
AVprozaik [17]

Using a thin stationary phase supported by an inert backing, thin layer chromatography (TLC) is a chromatographic technique used to separate the components of a mixture.

It can be carried out on an analytical scale to track the development of a reaction or on a preparative scale to purify minute quantities of a chemical. Because of its simplicity, comparatively low cost, great sensitivity, and rapid separation, TLC is an extensively used analytical method. Similar to all chromatography, TLC works on the premise that a chemical will have varying affinities for the mobile and stationary phases, which will influence how quickly it migrates. TLC aims to produce well-defined, well-separated spots.

Learn more about thin layer chromatography here-

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3 0
2 years ago
Brainliest for best answer
LekaFEV [45]

Answer:

Temperature, the average kinetic energy of particles, tells you how warm something is. Thermal energy, the total kinetic energy of the particles, tells you the extent to which a substance or object can transfer heat or make something else warmer. If an object's temperature increases, its thermal energy increases also.

Difference Between Temperature and Thermal Energy

a. Definition

Temperature: The average kinetic energy of the structural elements of a system (atoms, molecules, charged particles) is called temperature.

Thermal energy: The total kinetic energy of the structural elements of a system is called thermal energy.

b. Values

Temperature: The temperature can be positive and negative.

Thermal energy: The thermal energy always has positive values.

c. Units of measurement

Temperature: The temperature is measured in Celsius, Kelvin, and Fahrenheit.

Thermal energy: The thermal energy is measured in Joule and Calorie.

d. Quantitative dependence

Temperature: The temperature does not depend on the quantity of the substance – it is related to the average kinetic energy of the particles.

Thermal energy: The thermal energy depends on the quantity of the substance – it is related to the total kinetic energy of the particles.

2. The temperature on the Kelvin scale is bigger because the number 273 is always added to the Celcius temperature

3. There’s no really direct connection, however:

The thermal energy of the object is the kinetic energy of the individual molecules that make it up. The more fast-moving molecules inside it, the hotter it is.

When a moving object collides with something, some of the kinetic energy of the object turns into thermal energy. Warming something by rubbing it is an example of this.

4. For a thermometer that is liquid confined in a tube, as the temperature increases, the molecules of the liquid move faster, and the liquid expands. The amount of expansion is related to the increase in temperature.

hope it helps you , thank you

5 0
3 years ago
A 10.0 ml portion of 0.010 m hcl is diluted by adding it to100.0 ml of water. what is the ph of the solution
Volgvan

From the calculation, the pH of the solution after dilution is 3.

<h3>What is the pH?</h3>

The pH is the hydrogen ion concentration of the solution. Now we know that;

C1 =  0.010 m

V1 = 10.0 ml

V2 = 10.0 ml + 100.0 ml = 110 ml

C2 = ?

C1V1 = C2V2

C2 = C1V1 /V2

C2 =  0.010 m  * 10.0 ml / 110 ml

C2 = 0.00091 M

pH = -log[0.00091 M]

pH = 3

Learn more about pH:brainly.com/question/15289741

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4 0
2 years ago
Wat is significant figures
Sav [38]

<em>Answer:</em>

  •                   0.052301 km have 5 significant figure
  •                   400 cm have 1 significant figure
  •                   50.0 m  have 3 significant figure
  •                  4500.01 ml have 6 significant figure

<em>Explanation:</em>

According to rules of significant figure

0.052301 km have 5 significant figure:

  • Zero to the left of the first non zero digit not significant.
  • Zero between the non zero digits are significant.

<em>400 cm have 1 significant figure:</em>

  • Trailing zeros are not significant in numbers without decimal points.

<em>50.0 m  have 3 significant figure:</em>

  • Trailing zeros are significant in numbers when there is decimal points.

<em>4500.01 ml have 6 significant figure:</em>

  • Zero between the non zero digits are significant.
4 0
4 years ago
A cylindrical container of garlic powder has a height of 9 cm and 1.2 times the radius of another cylindrical container of the s
andreev551 [17]
To solve this you need to find the radius of the bigger cylinder so you have to solve the equation 36π=r^{2}π(9). When you solve it you end up with a radius of 2 in which you multiply by 1.2 which gives you the radius of the new cylinder which is 2.4. With the new radius you simply find the volume of the bigger cylinder which is 51.94πcm^{3}.
5 0
3 years ago
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