The assessments of the given statements on the nature of the fluids and
the fractional distillation processes are as follows;
a. TRUE
b. TRUE
c. FALSE
d. A fractionating column is a glass piece that contains metal pieces or glass beads
What are the correct points regarding fractional distillation?Option a.
Multiple vaporization-condensation cycles enhances the separation of
the components of the mixture;
Thereby enabling purification of the samples that have boiling points
that are close.
Option a is therefore; TRUE
a. Multiple vaporization-condensation cycles are needed to purify samples of relatively close boiling points. TRUEOption b.
The Height Equivalent to Theoretical Plate, HETP, indicates the
efficiency of the separation, and the fractionating column.
Therefore, option b. is TRUE
b. The column efficiency of a fractionating column can be assessed by HETP. TRUEOption c.
After every condensation-vaporization cycle, the condensate contains
more of the more volatile, component and the vapor be comes enriched
in the lower boiling point component.
Therefore, option c is FALSE
c. With every condensation-vaporization cycle, the vapors become enriched in the higher boiling point component. FALSEOption d.
d. The location of a fractionating column is placed vertically between the
mixture to be separated and the 'Y' adaptor, and consist of a straight
tube containing pieces of metals or glass beads.
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HEY I NEED ALL ANSWERS RIGHT NOW IT'S MISSING AND MY TEACHER ARE GRADING THEM NOW YOU WILL BE MARKED BRAINIEST
Not letting me add answer
Refer to the attachment
How many moles of N2 will be produced if 3.5 moles of Oz react?
Answer:
2.3 mol of N2
Explanation:
mol N2 = 3.5 mol O2 x. 2 mol N2
3 mol O2. = 2.3 mol N2.
Please answer asap!
Listed in the Item Bank are some key terms and expressions associated with the categories seen in the Venn Diagram. To find out
more information about items, some have more details available when you click on them. Drag and drop each item onto the proper
area of the diagram. If an item describes more than one category, be sure to place it in the overlapping space.
ITEM BANK: Move to Bottom
A ball is thrown up into the air and rises
until it begins to fall
Ball on the edge of a cliff
Can be transformed into other form of
energy
Gravitational, elastic, chemical
Increases with mass
Kinetic Energy
Both
Potential Energy
Based on the item bank, the various classification for each item are:
Both (Kinetic energy and Potential energy):
Increases with mass.Can be transformed into other form of energy.A ball is thrown up into the air and rises until it begins to fall.Potential energy:
Gravitational, elastic, chemical.What is energy?Energy can be defined as the ability to do work. Thus, energy must be possessed or transferred to an object or physical body before it can be used in doing a work or heating a system.
The forms of energy.In Science, there are different forms of energy and these include the following;
Gravitational energyPotential energyElastic energyChemical energyKinetic energyThe classification of the items.Both (Kinetic energy and Potential energy):
Increases with mass.Can be transformed into other form of energy.A ball is thrown up into the air and rises until it begins to fall.Potential energy:
Gravitational, elastic, chemical.Read more on potential energy here: https://brainly.com/question/1242059
25. An element has two stable isotopes. One isotope has a mass of 62.9 amu and an abundance of 69.2%.
The other isotope has a mass of 64.9 amu and an abundance of 30.8%. Show how to calculate the
average atomic mass of this element and give the value with the correct units and significant figures.
Don't just give the answer. Show your work
Show work:
Answer:
Answer:
Average Atomic Mass= 63.5 amu
Explanation:
Average Atomic Mass Equation:
(Mass 1)(% Abundance) +(Mass 2)(% Abundance)
Plug in Variables:
Make sure to convert the percentages into decimals. (Left two places)
Use the order of operations when solving.
(62.9)(0.692) + (64.9)(0.308) = AAM
Multiply each side
43.5268 + 19.9892 = AAM
Add the products together
63.516 = AAM
Add proper unit and satisfy the 3 significant figures needed
63.5 amu
what is dalang puppeteer
Calculate the degree of hydrolysis of a 02.M solution of NaHCO3. Ka1 = 4.3x10-7 and Ka2 = 4.8x10-11.
The degree of hydrolysis of 02.M solution of NaHCO₃ = 2.33 * 10⁻⁸
Given data :
Concentration of NaHCO₃ = 0.2 M
Ka1 = 4.3 * 10⁻⁷
Ka2 = 4.8 * 10⁻¹¹
Determine the degree of hydrolysisNaHC0₃ ----> Na⁺ + HCO₃
where : Na⁺ is a stronger and HCO₃ is weaker
Therefore;
hydrolysis will occur at HCO₃
HCO₃ + excess water --> H₂CO₃ + OH⁻ --- kh
kh = hydrolysis constant
Also
Kh = Kw / Ka1
where ; Kw = ionic product of water ( 10⁻¹⁴ ) , Ka1 = dissociation constant
Finally the degree of hydrolysis is
Kh = ( 10⁻¹⁴ ) / 4.3 * 10⁻⁷
= 2.33 * 10⁻⁸
Hence we can conclude that The degree of hydrolysis of 02.M solution of NaHCO₃ = 2.33 * 10⁻⁸
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The mass of an object is reported as 5.20 g +0.05g. 0.05 g indicates the
Answer:
Atomic number.
Because 2 values given here are 0.05g and one is 5.20g. So there are 2 atoms of one element or compound and one atom of another element or compound.
I am thinking there is an error in or sign. it is supposed to be ± instead of st + as in 5.20 g ± 0.05g.
0.05 g indicates the Measurement of Uncertainty
The mass of an object is reported as 5.20 g ±0.05g.
Here , the Measurement of Uncertainty ±0.05g. explains that Random error always occur when taking measurements reading with any scale.This tells us that the object's correct reading is between 5.15 g and 5.25 g from 5.20 g- 0.05g. and 5.20 g + 0.05g respectively.
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what is the correct name for Sn3(PO4)2
Can some help me with this?!
Really Failing in this subject!!
Answer:
6. The log or sticks is seen as stored potential energy (in the form of chemical energy). Stored potential energy is released by burning the log. The chemical reaction which comes from burning the log is called combustion. Combustion can only happen if oxygen is present. Combustion changes the potential chemical energy into kinetic energy in the form of heat.
7. Hair dryers use three different types of energy to work: Electrical energy, heat energy, and mechanical energy.
8. electrical energy - mechanical energy
9. electrical energy - thermal energy
10. electrical energy - sound energy
Explanation:
Like liquids gases have definite shape and valume true or false?
Answer:
False
Explanation:
A gas has neither a definite shape nor a definite volume.
Why are there often holes in slices of bread? The holes are created by bubbles of carbon dioxide gas (CO2) that form in the bread dough before and during baking. These bubbles form when single-celled organisms called yeast break down glucose (C6H12O6), a sugar in flour. In addition to carbon dioxide gas, a substance called ethanol (C2H6O) forms during this process.
In the chemical reaction described in the passage, which of the following are reactants?
The given reaction describes the decomposition of glucose into ethanol and carbon dioxide. This process is called fermentation. The reactant of this reaction is glucose.
What is fermentation ?Fermentation is the process of conversion of sugar molecule into other substance b the action of microbes such as yeast. In cellular respiration the glucose molecule is converting to carbon dioxide and water. Where as, in fermentation, the glucose is converting to carbon dioxide and ethanol.
The balanced chemical equation of the breaking of glucose into carbon dioxide and water is written as follows:
[tex]\rm C_{6}H_{12}O_{6} \rightarrow 2CO_{2} + 2C_{2}H_{5}OH.[/tex]
According to this reaction, one mole of glucose molecule gives 2 moles of carbon dioxide and 2 moles of ethanol. Hence, reactant in this reaction is glucose.
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What about Kevlar makes it so strong? (1 point)
A. Kevlar is made with spider silk, a naturally strong material.
B. The molecules stack together in crystal-like structures.
C. The molecules are short and create density
D. The molecules in Kevlar form a cylindrical-like structure.
WILL GIVE BRAINLIEST
I believe the answer is (B) as molten Kevlar when spun into fiber, its polymers have a crystalline arrangement.
Hope that helped!
Answer:
The molecules stack together in crystal-like structures
Explanation:
i've taken the test
Which energy involves energy of motion or work?
kinetic energy or potential energy
kinetic energy
Explanation:
energy associated with motion is kinetic energy
Answer: Kinetic Energy
Explanation: Kinetic energy is the energy of mass in motion. The kinetic energy of an object is the energy it has because of its motion. ... Note that energy is a scalar quantity, i.e., it does not depend on direction, and it is always positive.
Identify the independent variable and the dependent variable in each of the following hypothesis
HYPOTHESIS: When testing the effect of different alcohols on the cell membrane of red beet cells, the
damage to the membrane can be measured by the amount of red dye released into the solution.
Answer:
Independent variable: different alcohols
Dependent variable: red dye
A molecular _________
will tell you how many and what
kinds of atoms are in a molecule, but not how they are
arranged.
Answer:
A molecular formulae________
will tell you how many and what
kinds of atoms are in a molecule, but not how they are
arranged.
(Which organism provides energy to all other organisms in this ecosystem?)
A mushrooms
B coyote
C prairie grass
D prairie dog
Answer:
Your answer would be:
C.) Praire Grass
Explanation:
In a prairie ecosystem, the population (grass, sun, etc.) with the most amount of stored energy for use by other organisms would be the prairie grasses. The grasses will gather the energy from the sun storing it. A herbivore would come along and eat it gaining energy from it. Unfortunately, the herbivore will only gain an amount of energy that is 10x less than the plant had. If a carnivore ate the herbivore then the carnivore would gain energy but 10x less than the carnivore had gained.
(Example)
Plant: 1,000,000 *gathers energy from the sun*
Herbivore: 100,000 *gains energy but, 10x less than the plant gained*
Carnivore: 10,000 *gains energy but, 10x less energy than the herbivore gained*
Fungus: 1,000 *in a process called decomposition the fungus will gather energy from a dead organism* *the energy it gets may vary because it depends if it is a herbivore or carnivore that has decomposed* *In this example however it is a carnivore*
Animals that eat fungus: 100
Animals that eat the animal up above: 10
And it's important to see that as the energy is dispersed more and more it, becomes less energy given to each organism.
Have a great rest of your day
#TheWizzer
SOMEONE, please save me!
The acidity of a substance relates to the proportion of free hydrogen ions (H+) it contains. Acidity is measured on a logarithmic scale. Even a small decrease in pH of ocean water can cause a large increase in hydrogen ions and acidity. This increase can have grave effects on marine ecosystems. For the last 300 million years, the average pH of the oceans has been 8.2. Today, the average pH is 8.1. Using the hydrogen ion concentrations, what is the percent increase in acidity of the ocean in the past compared to today?
Answer:
The average pH today is 8.1, with 7.9 × 10-9 moles per liter of hydrogen ions. The original average pH was 8.2, with 6.3 × 10-9 moles per liter of hydrogen ions.
Using the formula, the percent increase in the number of hydrogen ions from then to now would be computed this way:
The hydrogen ion concentration and acidity of the ocean has increased by 25%.
Explanation:
There is a [tex]25%[/tex] % increase in acidity of the ocean when compared to the past.
What is an acid?An acid is a chemical species that can donate a proton or accept a lone pair of electron.
What is the average pH of ocean for the last 300 million years?The average pH of ocean for the last 300 million years is 8.2.
What is the current pH of the ocean?The current pH of the ocean is 8.1.
What is the percent increase in the acidity?Percent increase in acidity =
[tex]\frac{initial concentration of H^+ ions - final concentration of H^+ ions}{Initial concentration of H^+ ions}[/tex] ×[tex]100[/tex]
Therefore, percent increase in acidity = [tex]\frac{7.9-6.3}{6.3}[/tex]×[tex]100[/tex][tex]=25[/tex]%
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_C4H10 +_02 -> CO2+ _H2O
Balancing Equations
Answer:
2C4H10 + 13O2 -＞ 8CO2 + 10H2O
Explanation:
c = 8 8
h = 20 20
o = 26 26
during a storm, a tree fell over into a river. use evidence to support your explanation of what happened to the tree?
Answer:
The wind knocked it over.
Explanation:
This is true because in many storms, there are very high wind speeds.
NEED HELP ASAP!!!! Select 3 pieces of evidence listed in the article that show how human behavior impacts the planet.
Question 4 options:
Development of synthetic drugs and fabrics
Increased biodiversity and fewer extinctions
Nuclear energy and bomb testing
Increased nitrogen fixation
Answer:
Development of synthetic drug and fabric
Nuclear energy and bomb testing
Increased nitrogen fixation
Explanation:
This is because these things help global warming and animal extinction
2. Which of the following is NOT a type of ESP?
Which is an example of kinetic energy?
0 A
an arrow in flight
B..a ball right before it is dropped
c. a warm bicycle chain
D. a gallon of gasoline
A
I m not sure ...........................
Be sure your answer is in scientific notation. Use the “^”symbol for exponents.
(2.5 x 10^6) (7.2 x 10^-3)
Answer:
18,000
Explanation:
Claims • Evidence • Reasoning Make a claim about along which type of tectonic plate boundary this fault would be common. Provide evidence to support the claim and
explain your reasoning.
The continents of today contain remnants of their distant history. The presence of glaciers, fossils, and complementing coasts provides evidence of how the plates originally interacted. Plants and animals used to exist, and fossils when and where they did.
What is fossil ?Any surviving remnants, impression, or evidence of a once-living creature from a previous geological epoch is referred to as a fossil. Examples include fossilized bones, shells, exoskeletons, animal or microbe impressions in stone, amber-preserved artifacts, hair, petrified wood, oil, coal, and DNA traces.
There are four basic categories of fossils, each generated in a unique method and useful for conserving various kinds of animals. These include true form fossils, mold fossils, cast fossils, and trace fossils.
In river valleys, cliffs, hillsides, and man-made exposures like quarries and road cuts, sedimentary rocks of the appropriate age are exposed, and these are the places where fossils are most commonly found.
Thus, Plants and animals used to exist, and fossils when and where they did.
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Show step-by-step
If 20-g of O2 is mixed with 2-g of H2 and the mixture is ignited, what is the mass of water that may be produced?
Answer:
11.647g of water may be produced.
Explanation:
chemistry of the reaction:
2O2 + 2H2 ----> 2H2O + O2
64g + 4g yields 36g of water,
20g + 2g yields 11.647058824g of water
HELP WILL GIVE BRAINLIEST
What is heat energy indirectly measured by?
A. temperature
B. recording the motion of molecules
C. kinetics
Answer:
Temperature
Explanation:
.
Answer:
a
Explanation:
I just took the test
Question 14 of 32
Which of the following pairs of elements will form covalent bonds with each
other?
The Periodic Table
O A. Silicon (Si) and nitrogen (N)
B. Magnesium (Mg) and oxygen (0)
C. Chromium (Cr) and zinc (Zn)
O D. Potassium (K) and bromine (Br)
how many moles of (NH4)2Fe(SO4)2 are in 94.00 mL of 2.50 M (NH4)2Fe(SO4)2 solution.
Answer:
[tex]n_{solute}=0.235mol[/tex]
Explanation:
Hello.
In this case, we are talking about molarity which is an unit of concentration relating the moles of the solute and the volume of the solution in liters only:
[tex]M=\frac{n_{solute}}{V_{solution}}[/tex]
Since the solute is the (NH4)2Fe(SO4)2 and the volume in liters:
[tex]V=94.00mL*\frac{1L}{1000mL} =0.094L[/tex]
Thus, for the given 2.50-M solution, the moles of solute result:
[tex]n_{solute}=M*V=2.50mol/L*0.094L\\\\n_{solute}=0.235mol[/tex]
Best regards.
lewis structure of HONO2 (HNO3)
I really hope this diagram helped you.
If you have further questions don't hesitate to ask :)
A store sell 21 piece of clothing every 45 minutes.How long will it take the store to sell 100 pieces of clothing?
Explanation:
21 piece =45 mins
100 pieces= x
on cross multiplication
21x=45×100mins
21x =4500mins
x =4500mins÷21
=214.3mins or 3.57hrs