The use of evaporation and condensation to separate the partsof a mixture is called _____

Answers

Answer 1

Answer: Evaporation Condensation is used to seperate the parts of a mixture

Explanation: This is because it is the first order of the distilation process

Answer 2

The use of evaporation and condensation to separate the parts of a mixture is called distillation.

What is distillation?

Separating salt water to produce pure water and salt is an example of a simple distillation mixture.

The water begins to evaporate during the distillation process, and the vapor cools down to form pure water.

A second container is used to collect the pure water.

Thus, the use of evaporation and condensation to separate the parts of a mixture is called distillation.

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Related Questions

hello people ~
Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

A. Carbon monoxide

B. Sulphur dioxide

C. Nitrogen dioxide

D. Carbon dioxide

Answers

Answer:

Carbon dioxide

Explanation:

The reaction is given by

C+O_2-->C0_2

CO2 is a harmful gas also responsible for the global warming and air pollution

When coal is burnt in the presence of excess air, some of the gases produced include carbon dioxide, oxides of nitrogen, and sulfur dioxide.

What are the gaseous products from coal burning?

When coal is burnt in the presence of a lot of air, a variety of gases are produced: These include:

Carbon dioxide which is the major productOxides of nitrogenOxide of sulfur

Aside from carbon dioxide, other gases depend on the content of coal.

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Given what you observe at the molecular/atomic level, why would surface area have this effect?

Answers

Answer:

Increasing the surface area of a reactant increases the frequency of collisions and increases the reaction rate. Several smaller particles have more surface area than one large particle. The more surface area that is available for particles to collide, the faster the reaction will occur.

Explanation:

:)

Use the bond energy to calculate an approximate value of δh for the following reaction. Which is the more stable form of fno2?

Answers

The enthalpy of reaction or ∆H reaction is the difference between the bond energy of the reactants and the bond energy of the products.

What is ∆H reaction?

The term ∆H reaction refers to the heat that is evolved or absorbed in a chemical reaction. It is also known as the enthalpy of reaction.

The question is incoherent but I will try to answer as much as possible. Using the values of bond energy, ∆H reaction = Bond energy of reactants - bond energy of products. This will give us the enthalpy of reaction.

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Balance the chemical equation

Answers

Explanation:

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A nitrogen bubble with a volume of 0.0050 mL forms in the joint of a scuba diver as she ascends rapidly from a pressure of 4.1 atm to the surface, with a pressure of 1.0 atm. What is the volume of the bubble at the surface

Answers

As the scuba diver ascends rapidly to the surface at the given pressure, the volume of the nitrogen bubble at the surface becomes 0.021mL.

Boyle's law

Boyle's law states that the volume V of a given quantity of gas is inversely proportional to its pressure P as long as temperature remains constant.

Boyle's law is expressed as;

P₁V₁ = P₂V₂

Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.

Given the data in the question;

Initial volume; V₁ = 0.005mL = 5.0 × 10⁻⁶LInitial pressure; P₁ = 4.1atmFinal pressure; P₂ = 1.0atm  Final volume; V₂ = ?

We substitute our given values into the expression above to find the final volume.

P₁V₁ = P₂V₂

[tex]V_2 = \frac{P_1V_1}{P_2} \\\\V_2 = \frac{4.1atm \ *\ 5.0*10^{-6}L}{1.0atm}\\ \\V_2 = \frac{4.1 \ *\ 5.0*10^{-6}L}{1.0}\\\\V_2 = 2.05*10^{-6}L\\\\V_2 = 0.021mL[/tex]

Therefore, as the scuba diver ascends rapidly to the surface at the given pressure, the volume of the nitrogen bubble at the surface becomes 0.021mL.

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What happens to water when it freezes?

a) it expands.
b) it forms vapor
c) its density increases.
d) its composition changes

Answers

Answer:

it expands

Explanation:

Answer:

a) it expands.

Explanation:

Water is more dense when it is a liquid, and less dense as a solid. This is why ice floats above water.

Hence, Ice expands when it freezes.

Why do we balance chemichal reactions

Answers

Answer:

We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.

Explanation:

We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.

Answer:

to satisfy the law of conservation of matter.

the law of conservation states that matter can not be created nor destroyed.

Which particle model diagram represents xenon at stp?

Answers

The model that should show the corresct representation of xenon gas is one in which the gas molecules  are isolated and monoatomic.

What is a noble gas?

A noble gas is a member of group 18 of the periodic table. Noble gases are known not to interact with each other and occur as monoatomic particles.

The images are not shown here hence the question is incomplete. However, we do know that any of the models that show individual monoatomic particles is a representation of xenon gas.

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How many moles of Na are needed to
produce 15 moles of NaCl in the reaction
2Na + Cl2 = 2NaCl?
A conversion involving moles of one
substance to moles of another
substance.

Answers

Answer:

15 moles

Explanation:

15 moles of NaCl will be obtained from 15 moles of Na.

An ice freezer behind a restaurant has a freon leak, releasing 41.44 g of C2H2F3Cl into the air every week. If the leak is not fixed, how many kilograms of fluorine will be released into the air over 6 months? Assume there are 4 weeks in a month. mass of fluorine leaked over 6 months

Answers

Answer:

994.56

Explanation:

41.44 multiplied by 4, that gives us a month.

Then multiply by 6.

0.5mol/dm3 hydrochloric acid is added gradually to a flask containing 20cm3 of 2 mol/ dm3 sodium hydroxide solution.
What is the total volume, in cm3, of the mixture in the flask when the solution is just neutral?
A 30
B 40
C 60
D 100

Answers

Answer:

The answer is B which is 40

From the calculations and the data presented, the total volume in the flask is 100cm^3

What is neutralization?

A neutralization occurs between an acid and a base to yiled salt and water only.

The reaction equation here is; HCl + NaOH -----> NaCl + H2O. Now, the volume of HCl used is obtained from;

2 * 20 * 1/0.5 * 1 = 80 cm^3

Total volume in the flask =  80 cm^3 + 20cm3 = 100cm^3

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If the density of lead is 11.34g/.what is the density in kg/l

Answers

Answer:

0.01134kg

Explanation:

You divide by 1000 to get the kg

what is the molarity of 1 mole of Ba+ in 2 L of water

Answers

Answer: 0.5 M

Explanation:

molarity is defined as [tex]\frac{mol}{L}[/tex]

in the question, we are already given the amount of moles of Ba+ and L of water. we can just plug it into the equation, [tex]\frac{1}{2}[/tex].

thus, the molarity will be 0.5 M

hope this helped! ♡

Which of these describes an ethical dilemma that drug designers could face?
a. whether people should take medicine or if instead they should
seek alternative treatments.
b. a drug lowers blood pressure but can cause severe coughing
spells.
c. a new drug is effective in preventing cancer cells from
reproducing
o d. a drug for blood pressure is absorbed in the colon. it is effective,
but occasionally it can erode the colon walls.

Answers

The statement 'whether people should take medicine or if they should seek alternative treatments' describes an ethical dilemma that drug designers face.

What is drug development?

Drug development refers to all the processes from target drug identification to drug validation and commercialization.

Drug development involves different stages of development including preclinical and clinical trials.

Ethical dilemmas in drug development include the release of a drug that is ineffective when compared to parallel treatments.

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Answer:

A drug for blood pressure is absorbed in the colon. It is effective, but occasionally it can erode the colon walls.

Explanation:

i just took the test and got it right.... i hope this helps :)

Determine the mass of sodium acetate necessary to produce 100 ml of an acetate buffer

Answers

Explanation:

Ethanoic acid is a weak acid and dissociates:

C

H

3

C

O

O

H

C

H

3

C

O

O

+

H

+

For which

K

a

=

[

C

H

3

C

O

O

]

[

H

+

]

[

C

H

3

C

O

O

H

]

=

1.8

×

10

5

Please remember that these are equilibrium concentrations .

p

K

a

=

log

K

a

=

log

[

1.8

×

10

5

]

=

4.74

n

=

c

×

v

n

C

H

3

C

O

O

H

=

0.20

×

200.0

1000

=

0.04

Freon-12 synthesized by the reaction between fluoride at carbon tetrachloride and antimony(III)Suppose 5.0 mol of antimony (III) fluoride is added to 10.0 mol of carbon tetrachloride: How many moles each compound (CCL; SbF;, CClFz, and SbCI3) are there if the reaction is |00% complete

Answers

I hope this help but I’m sorry if it wrong

Suppose 5.0 mol of antimony (III) fluoride is added to 10.0 mol of carbon tetrachloride, and from the 100% reaction there are the equivalents of 0 moles of SbF₃, 5.0 moles of SbCl₃, 0 moles of CCl₄, and 15.0 moles of CClF₂.

What is the significance of the balanced reaction?

A balanced reaction is one where the reactants and products are present in equal amounts, and if the 100% reaction takes place, then the reactant sides have 1 mol of SbF₃ and 3 mol of CCl₄ that make the product of 1 mol of SbCl₃ and 3 mol of CClF₂. After the 100% reaction, all the reactants get converted into the product. The complete reaction is the below.

SbF₃ + 3CCl₄ → SbCl₃ + 3CClF₂

Hence, suppose  5.0 mol of antimony (III) fluoride is added to 10.0 mol of carbon tetrachloride, and from the 100% reaction there are the equivalents of 0 moles of SbF₃, 5.0 moles of SbCl₃, 0 moles of CCl₄, and 15.0 moles of CClF₂.

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Which is a disadvantage of using chemical indicators? they are expensive to use. they measure ph directly. they must be selected for a narrow ph range. they do not use electricity to operate.

Answers

Chemical indicators are the chemical reagents that show the change in reaction by changing color. Chemical indicators must be chosen with a narrow pH range.

What are indicators?

Indicators are the solutions or the substances used for the qualitative and the quantitative measurement by a change in color because of the absence or the presence of the sample concentration.

The chemical indicators cannot detect the exact pH and should be used with a narrow range of pH.

Therefore, option C. the narrow range of pH is the disadvantage of chemical indicators.

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Answer:

C (They must be selected for a narrow ph range.

Explanation:

Edg 2022

Hello people ~
CO2 extinguishers help extinguish fires by –

A. Cutting supply of nitrogen.

B. Limiting the supply of fuel.

C. Reducing the heat of the surroundings.

D. Cutting the supply of oxygen​

Answers

Answer:

Cutting the supply of oxygen

Explanation:

We know that a thing need three things to burn

Oxygen Heat flammable object .

Co_2 stops oxygen supply so fire gets extinguished

how are organelles specialized to perform various tasks in a cell?

Answers

Answer:

Organelles are structures within a cell that perform specific functions like controlling cell growth and producing energy. Plant and animal cells can contain similar types of organelles. However, certain organelles can only be found in plant cells and certain organelles can only be found in animal cells.

The number of protons and neutrons in an atom is that atoms __ number.

Answers

Answer: Mass number

If you look at the periodic table, you can simply find the mass number either on the top or bottom of the element.

Which process or processes produce an increase in entropy? i. n2(g) 3h2(g) right arrow. nh3(g) ii. c10h8(g) right arrow. c10h8(s) iii. ch3oh(l) right arrow. ch3oh(aq) i only ii and iii iii only i and iii

Answers

Entropy is commonly understood as the system's degree of disorder or unpredictability. The correct option is, (C) (iii) only

What is entropy?

Entropy is a thermodynamic number that represents the inability of a system's thermal energy to be converted into mechanical work and is commonly understood as the system's degree of disorder or unpredictability.

The degree of unpredictability of a molecule rises when it transitions from a solid to a liquid state. As a result, the entropy will rise.

Similarly, when we move from a liquid to a gaseous state, the unpredictability of the molecule increases. As a result, the entropy will rise.

However, as we progress from gas to liquid to solid, the degree of molecular randomization reduces. As a result, the entropy will decrease.

Or, to put it another way, the higher the number of moles in a product, the higher the entropy.

(i) [tex]N_2(g)+3H_2(g) \rightarrow 2NH_3(g)[/tex]

Entropy falls in this reaction because the number of moles on the product side is fewer than the number of moles on the reactant side.

(ii) [tex]C_{10}H_8(g) \rightarrow C_{10}H_8(s)[/tex]

Entropy lowers in this process because the degree of randomness of the molecules diminishes as we move from a gas to a solid-state.

(iii) [tex]CH_3OH(l)\rightarrow CH_3OH(aq)[/tex]

Because the methanol liquid dissociated into ions, the number of moles present on the product side is more than the number of moles present on the reactant side, entropy rises in this reaction.

Hence, the correct option is, (C) (iii) only.

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What change would occur in the mass between the reactants (lead nitrate and potassium iodide) and the products (lead iodide and potassium nitrate)?

Please help me this is coming in my exam. Thank you

Answers

Answer:

Pb(NO

3

)

2

+

2

KI

PbI

2

+

2

KNO

3

Explanation:

Describe how you use two living and two nonliving natural resources every day.

Answers

Answer:

Well, if you live on a farm, you have to feed the living animals and when you eat, you use a fork, knife, napkin, chair and those are all nonliving.

Explanation:

Also, if your trying to go on a scavanger hunt, and you pick up an animal then you are  interacting with a living resource. Also water can be counted as both because water isnt alive but it can be used on living things. like if you were to drink it or water the plants.

Answer:

I use plant and dog as living things and mobile and dish as non living things everyday.

Explanation:

I use plants to get oxygen, vegetables and herbs and dog to help me to protect my home everyday. similarly, I use mobile to call others and I use dish to eat food everyday.

Answer these for 40ps

Answers

Answer:

7. H

8. F

9. G.

10. D

11. A

12. E

13. B

14. C

A student creates a model that displays a cross-section of a metal wire wrapped in plastic insulation. Which statement best describes the metal wire?
A. The metal wire is an element.
B.The metal wire is a compound.
C. The metal wire is a homogenous mixture.
D. The metal wire is a heterogeneous mixture.

Answers

Cross-section of a metal wire wrapped in plastic insulation the metal wire is an element.

What is an element?

An element is a substance or material that cannot be affected by an external substance or cannot be broken down by any reaction.

Metal wire is serving as an element, it should not be easily broken or penetrated as an insulator.

Therefore, Cross-section of a metal wire wrapped in plastic insulation the metal wire is an element.

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Please help-

Answers

Answer:

you are not posted question

On all aerosol cans you see a warning that tells you to keep the can
away from heat because of the danger of explosion. What is the
potential volume of the gas contained in a 500.0 mL can at 25°C if it
were heated to 54°C. In other words if the can could expand to allow
the gas to take up a greater volume, what would be the new volume of
the gas when heated as previously described?

Answers

Gas laws show the relationship between tempertaure, pressure, volume, volume and number of moles. The new volume of the gas is 549 mL.

What is Charles law?

Charles law states that, the volume of a given mass of gas is directly proportional to its temperature at constant pressure .

Given that;

V1 = 500.0 mL

T1 = 25°C  or 298 K

V2 = ?

T2 = 54°C + 273 = 327 K

Since;

V1/T1 = V2/T2

V1T2 = V2T1

V2 = V1T2/T1

V2= 500.0 mL * 327 K/298 K

V2 = 549 mL

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ILL BRAINLIST ITS URGENTTT!!!!

Investigate the rate of success that CCS projects have shown and predict it’s viability as a method of reducing carbon emissions to achieve our target of zero emissions by 2050.

Answers

Answer:

With the European Climate Law, the EU committing to carbon neutrality by 2050. What does that mean in practice?

Climate change is already affecting the entire world, with extreme weather conditions such as drought, heat waves, heavy rain, floods and landslides becoming more frequent, including in Europe. Other consequences of the rapidly changing climate include rising sea levels, ocean acidification and loss of biodiversity.

In order to limit global warming to 1.5 degrees Celsius – a threshold the Intergovernmental Panel for Climate Change (IPCC) suggests is safe – carbon neutrality by mid-21st century is essential. This target is also laid down in the Paris agreement signed by 195 countries, including the EU.

In December 2019, the European Commission presented the European Green Deal, its flagship plan that aims to make Europe climate neutral by 2050. This target will be reached through the European Climate Law that sets climate neutrality into binding EU legislation.

Explanation:

ok bet i got u

(a) what is the approximate ductility (%el) of a brass that has a yield strength of 230 mpa (33360 psi)?

Answers

Based on the calculations, the approximate ductility (%el) of this brass is equal to 2.3%.

Given the following data:

Yield strength = 230 mpa (33360 psi).

What is ductility?

Ductility can be defined as an important property of a material which determines its ability to become elongated due to the application of stress.

Mathematically, the ductility of a material can be expressed as percentage elongation in length:

[tex]\% el = \frac{\Delta L}{L_i} =\frac{L_f - L_i}{L_i}[/tex]

Where:

[tex]L_i[/tex] is the original length.[tex]L_f[/tex] is the final length.[tex]\Delta L[/tex] is the yield strength.

For this exercise, let us assume the original length of this brass is equal to 100 meters.

Substituting the parameters into the formula, we have;

[tex]\% el = \frac{230}{100}[/tex]

Ductility = 2.3%.

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The approximate ductility (%el) of a brass that has a yield strength of 230 mpa is 2.3%.

How do we calculate the approximate ductility?

Approximate ductility of any substance will be calculated by using the below equation as:

%el = ΔL / L₁, where

ΔL = yield strength = 230 MPaL₁ = initial length = 100 MPa (assume)

On putting this values, we get

%el = 230/100 = 2.3%

Hence 2.3% is the approximate ductility.

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Balancing chemical equation

Answers

Explanation:

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One mole of copper atoms is 6.02 x 1023 copper atoms.True or false? Julian has a points card for a movie theater. He receives 85 rewards points just for signing up. He earns 3.5 points for each visit to the movie theater. He needs 120 points for a free movie ticket. Which equation or tape diagram could be used to represent the context if xx represents the number of visits Julian must make to earn a free movie ticket? What is the slope-intercept equation for this line?y = [?]x +[?] The school cafeteria sells two kinds of wraps: vegetarian and chicken. The vegetarian wrap costs $1.00 and the chicken wrap costs $1.90. Today they made $78.60 from the 57 wraps sold. How many of the wraps so ld were vegetarian? Find the slope of the line that passes through the two given points:(-1, 4) and (5, 3)A line starting in the third quadrant, crossed the x axis twice, and then ending in the first quadrant send link for a qc or paddle What is the main conflict between the Arab nations and Israel?a.The Israelis do not recognize Lebanon as a free country.b.Israel wants the Arab nations to pay an extra tax on the goods they export to them.c.The Arab nations want to control Israel's government and military.d.The Arab nations do not recognize Israel as an independent country. What is the median of this data set?{29, 22, 23, 31, 29, 29, 22, 23} Under the allowance method, when a specific account is written off. Question 1: Which statement best summarizes this passage 1. It is more dangerous to bike on trails than on float roads. 2. A student research project showed that the wheel size affects a bikes speed and control. 3. Larger wheels perform better on hills, while smaller wheels preform better on flat roads. 4.Students from 75 countries present their projects at an international science fair Question 2: 1. The word "crucial" as it is used in paragraph 3 means- 1. Difficult 2.exciting 3.important 4.painful 50 = - in=in quadrant IIGiven cos =Find sin3 The Union would win the Civil War if it was able to:A. end slavery in the Confederate states.B. convince the South to stop attacking free states.C. force the South to rejoin the United States.D. destroy all major cities in the South. what makes the geometry of the tin(4) hydride to have a grater stability? What are the factors of 2x2 3x 54? Select two options. 2x 9 2x 6 2x 6 x 6 x 6. i need helppppppppp T^T .What was the draft system called under the Wilson administration? Compared to the nucleus 5626fe, what is the density of the nucleus 112 48cd? Why is tourism important in the dominican republic?. Butterflies laying their eggs on milkweed plants occurs at what level of the biosphere hierarchy? a. Ecosystem b. Biome c. Population d. Community. in the small intestine, which of the following enzymes breaks down oligosaccharides?