1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Inessa05 [86]
3 years ago
7

Describe the interactions between molecules in a mixture (analyte), the stationary phase and various mobile phases used in colum

n chromatography and the effect of these interactions on the separation of the mixture.
Chemistry
1 answer:
ratelena [41]3 years ago
4 0
<h2>Hydrophobic interactions. </h2>

Explanation:

  • Column chromatography is a technique used for separation in which a mixture having a mobile phase is caused to move in contact with the stationary phase.
  • The Stationary phase used is a solid and the mobile phase used is liquid.
  • There are interactions between the molecules of the analyte, stationary phase, and the various mobile phases like hydrogen bonding and dipole-dipole interactions.
  • The effect of these interactions is that the compound is retained for a longer time and as there are different interactions between stationary and mobile phases they are carried along with the mobile phases with varying degrees and the separation of the mixture is done.
You might be interested in
Solids or liquids are not included in an equilibrium expression because:
Harlamova29_29 [7]
I believe the answer is D
7 0
3 years ago
the specific heat capacity of water is 1 cal/gc how much heat in calories is released when 25.7 of water is cooled from 85 to 49
liraira [26]

Answer:

The amount of heat that is released is -925.2 cal

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is the amount of heat that a body can receive or release without affecting its molecular structure, that is, it does not change the state (solid, liquid, gaseous).  In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state.

The equation that allows to calculate heat exchanges is:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature.

In this case:

  • c= 1 \frac{cal}{g*C}
  • m= 25.7 g
  • ΔT= Tfinal - Tinitial= 49 °C - 85 °C= -36 °C

Replacing:

Q= 1 \frac{cal}{g*C} *25.7 g* (-36 C)

Solving:

Q= -925.2 cal

<u><em>The amount of heat that is released is -925.2 cal</em></u>

8 0
3 years ago
Which statement about the periodic table is true?
dedylja [7]

Answer

Two different elements have similar chemical properties when they have the same number of valence electrons in their outermost energy level. ... Elements in the same column of the Periodic Table have the same number of valence electrons – that's why they have similar chemical properties.

8 0
2 years ago
About 95-98 percent of alcohol is oxidized to what two substances
Sunny_sXe [5.5K]

Answer:

D. Water and Carbondioxide

Explanation:

Combustion of organic compounds in the presence of excess Oxygen will liberate carbondioxide (CO2) and water vapour (H2O). This is an exothermic reaction because heat is liberated to the surroundings.

CnH2n+1OH(aq) + (3/2*n)O2(g) --> nCO2(g) + (n + 1)H2O(g)

Addition of Oxygen can also be termed as a redox reaction. In this case, alcohols are oxidised while the Oxygen is reduced.

Example, (propanol)

C3H7OH(aq) + 9/2O2(g) --> 3CO2(g) + 4H2O(g)

5 0
2 years ago
What is responsible for storing urine
SpyIntel [72]
The bladder is responsible.
5 0
3 years ago
Read 2 more answers
Other questions:
  • The half-life of phosphorus-32 is 14.26 days. calculate its decay constant. express the decay constant numerically in inverse da
    10·2 answers
  • Which material has a crystalline structure at room temperature ( 20 degrees Celsius )
    6·2 answers
  • What is the role of neutrons in an atom??
    8·2 answers
  • A sealed flask contains 1.3 x 10^25 molecules of CO2. How many moles of CO2 are in the flask?
    7·2 answers
  • HCl reacts with Barium Hydroxide to produce barium chloride and water. how many ml of a 3.00 M hydrochloric acid solution would
    10·1 answer
  • Which of the following statements is always true? a. The rate law can be determined from the stoichiometric equation. b. The rat
    7·1 answer
  • True or False-- Siblings (brothers and sisters) may or may not have the same combination of traits.
    13·2 answers
  • When something heats up it moves faster when something close down it moves slower
    5·2 answers
  • What makes people more vulnerable to addition​
    15·1 answer
  • The Formation Of Lithium Iodide
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!