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
vivado [14]
3 years ago
8

Give reason:

Chemistry
1 answer:
Darya [45]3 years ago
6 0

Answer:

a.The glass beads present in the fractionating column provide a large surface area for hot vapours to cool and condense repeatedly

b.Crystallization is better than evaporation because some solids can decompose or can get burned during evaporation

Explanation:

a.The fractionating column is fitted in the neck of the distillation flask containing the mixture of liquids to be separated

b. Also in some cases impurities can remain dissolved in the solution while evaporation which cannot be removed even after filtration

You might be interested in
Please answer asap.......................
Margarita [4]

Answer:

A

Explanation

Devision

6 0
3 years ago
The balloon Spirit of Freedom, flown around the world by American Steve Fossett in 2002, contained 550,000 cubic feet of helium.
Elodia [21]
Assuming the balloon initially has volume of 0 when deflated, the total P(deltaV) = (1.00 atm)(550,000 ft^3) = 550,000 atm-ft^3. To convert into work units, we can first convert ft^3 to L:
(550,000 atm-ft^3)(1 m/3.28 ft)^3
= (15,586.2 atm-m^3)
Then we convert to L:
(15,586.2 atm-m^3)(1000 L/m^3)
= 15,586,200 atm-L
Then we convert to J:
(15,586,200 atm-L)(101.325 J / 1 atm-L)
= 1.579 x 10^9 J
3 0
3 years ago
The difference betweeen chemical cell and electrolytic cell ?​
goldfiish [28.3K]

Answer:

chemical cell means chemical and electric cell means electricity

Explanation: plz say at least thanks  plzzzzzz

!!!

4 0
3 years ago
How does changing the temperature affect the chemical reaction?
Rufina [12.5K]

Answer:

C

Explanation:

Temperature is directly related to kinetic energy (KE). As we raise temperature, we are raising KE, as well. Particles with more KE move more quickly and with more force.

This means that these particles are more likely to collide with each other and react to allow the chemical reaction to follow through. In turn, if the chemical reaction is more likely to go to completion, the reaction rate increases, eliminating A and B.

The concentration of the solute is not affected by the temperature; in other words, temperature will not increase or decrease the amount of solute in the solution, so eliminate D.

Thus the answer is C.

Hope this helps!

4 0
4 years ago
How many grams are in 0.787 moles of kcn
Eddi Din [679]

Answer:

=> moles = Given mass/molar mass

=> 0.787 = Given mass/(39 + 12 + 14)

=> 0.787 = Given mass/65

=> mass = 0.787 × 65

=> <u>mass = 51.155 g</u>

4 0
2 years ago
Other questions:
  • Which of the following examples demonstrates acceleration? Question 17 options: A boy running at a constant speed across the str
    10·2 answers
  • Is ethane polar or nonpolar
    5·1 answer
  • At which temperature is the vapor pressure of ethanoic acid equal to 110. kPa?<br>​
    10·1 answer
  • What type of bond is formed between sodium and iodine in sodium iodide (NaI)? A. ionic B. metallic C. polar covalent D. nonpolar
    8·1 answer
  • This type of nucleus is formed during a solar nuclear reaction by the fusion of four nuclei.
    8·1 answer
  • Why is electrical conductivity a resourceful property of metals like copper, silver, and aluminum?
    8·1 answer
  • In order to determine the oil content of different types of potato crisps (chips), a student weighed 5.00g of crushed crisps and
    14·1 answer
  • PLS HELP! I NEED THIS!!!!
    14·2 answers
  • Message me please haha​
    15·2 answers
  • PCl5 is placed in a sealed container at an initial pressure of 0.0730 bar . What is the total pressure at equilibrium
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!