Answer:
Acetone
Explanation:
Chromatography has to do with the separation of substances by eluting the components of the solute using a mobile phase. The composition of the mixture to be separated decides the mixture of solvents (mobile phase) that are to be used for elution.
In this case the mixture to be separated comprises of substance A which is polar and substance B which is non polar. It is observed that the mobile phase moves B up the plate but not the polar substance, A. This means that a polar solvent such as acetone should be added to the mobile phase in order to achieve better elution of A.
8. The kinetic energy between the particle is maximum in which state
Answer:
Particles has the highest kinetic energy when they are in the gaseous state. Kinetic energy is related to heat (also called thermal energy
Which of the following relationships can be measured in light years?
the length of time it takes light to reflect from a plane mirror
the amount of light absorbed by the Earth
the index of refraction of a mirage
the distance between stars and galaxies
All of the choices are correct.
In a separate location, take notes from the sources you have identified. The notes will provide details for your presentation. While taking notes from texts and websites, use these reading strategies. In the space provided, write four pieces of information that you intend to use in you presentation
Answer:
you didn't specify what the presentation was about. However, I can help you by showing you how to do this activity.
When making notes of the sources, you must show when these sources were built and what is their direct relationship with your research, in addition to highlighting the concepts and parts you will use in your presentation. It is also important that you show the connection between the sources, that is, how they come together to collaborate for your presentation. We must not forget that you must have different sources, that is, different media, such as websites, books, magazines, interviews, videos, among others.
After you have highlighted which parts of the sources you will use in the presentation, you should reread those parts and make topics about which point of those parts will be used in your presentation, that is, you must show the most revealing points, those to which you won't talk about.
Reacts with water to produce OH- ions.
This applies to:
Acids
Bases
Neutral solutions
Both Acids and Bases
Answer:
Bases
Explanation:
According to a Swedish scientist called Svante Arrhenius, a base is a substance that dissociates into hydroxide ions (OH-) when in an aqueous solution i.e. when dissolved in water.
For example, sodium hydroxide (NaOH) will dissolve in water and dissociate into the following;
NaOH (aq) → Na+ (aq) + OH- (aq).
Hence, according to this question, the reaction with water to produce OH- ions is only applicable to BASES in accordance to Arrhenius definition.
a 0.1 kg slinky sits at the top of a staircase with 14 J of potential energy. How high is the staircase?
Answer: The staircase is 14.28 m high.
Explanation:
Given : Mass = 0.1 kg
Potential energy = 14 J
Potential energy is the energy occupied by the position of a substance. Therefore, formula for potential energy is as follows.
P.E = mgh
where,
m = mass
g = gravitational energy = [tex]9.8 m/s^{2}[/tex]
h = height of object
Substitute the values into above formula as follows.
[tex]P.E = m \times g \times h\\14 J = 0.1 kg \times 9.8 m/s^{2} \times h\\h = \frac{14 J}{0.1 kg \times 9.8 m/s^{2}}\\= \frac{14 J}{0.98 m kg/s^{2}}\\= 14.28 Js^{2}/ mkg (1 J s^{2}/m kg = 1 m)\\= 14.28 m[/tex]
Thus, we can conclude that the staircase is 14.28 m high.
Workers who build railway tracks often use a process called thermite welding to connect pieces of track. Thermite is a mixture of aluminum metal (Al) and ferric oxide (Fe2O3). A worker places thermite between two pieces of track and then burns it to form aluminum oxide (Al2O3) and iron (Fe). As the reaction happens, the air around the mixture becomes so hot that the two pieces of track fuse together.
Is this chemical exothermic or endothermic?
Explanation:
guess
exothermic because of the heat
when silver is mixed with aluminum nitrate the products are silver nitrate and aluminum metal. how many molocules of silver nitrate are produced if we have 216 grams of aluminum nitrate?
STOICHIOMETRY
Answer:Aluminum metal in silver nitrate ….
You might be expecting silver metal, Ag, and aluminum nitrate, Al(NO3)3, as products. But instead all you will end up with is wet aluminum. The passivating layer of Al2O3 will prevent aluminum from reducing silver ions.
Explanation: Al(s) + AgNO3(aq) → No reaction
The two things we might do to the mixture to disrupt the Al2O3 surface will cause the Ag+ ions to react. Often a source of chloride ion is used because AlCl4^- will form, exposing the aluminum surface. But that will cause AgCl(s) to precipitate. You can also make the solution basic with NaOH and form Al(OH)4^-, but that will cause Ag2O(s) to form. (You will get Ag2O instead of AgOH.)
Concentrated acids will oxidize any aluminum metal that might be exposed if you were to add concentrated HNO3. That would simply enhance the
What type of shape do solids have?
hope it helps :-). good morning.
I need help some plz and don’t give me no virus or some fake answer I really need help
Answer:
1.) The possible genotypes are FF and Ff
The phenotype is full pod shape
2.) The possible genotypes are GG, Gg, and gg
The photypes are Green (for those whose genotype is GG and Gg) and yellow ( For those whose genotype is gg)
Explanation:
My hand writting isn't the best so I'll also type it.
1.) There are only 2 possible genotypes the offspring can have which are FF or Ff.
Because the dominant allele is F all the offspring from this cross will have a full pod shape phenotype.
2.) There are only 3 possible genotypes the offspring can have which are GG, Gg, and gg.
The majority of the offspring will have a green phenotype while the remainder will be yellow. G is the dominant allele so any offspring with the genotype GG or Gg will be green. While g is a recessive allele and only offspring who has a genotype of gg will be yellow.
*On my paper for question 2 for the phenotype explination I accidently wrote genotype instead of phenotype.
*Another note is that an offspring must have both recessive alleles in order to show the recessive traits. That is why gg is yellow and Gg is green.
Hope I helped
Please Help !!
The weak base ionization
constant (Kb) for CIO is
equal to:
Answer:
The answer for CIO- weak base ionization constant kb would be [HCIO][OH-]
__________
CIO-
Explanation:
HOPE YOU HAVE A WONDERFUL DAY BEAUTIFUL.
what is glue made up of
Answer:
Glue is made up of - combination of polyvinyl acetate (PVA), water, ethanol, acetone and other substances. The animal remains that are the raw materials for glue may include ears, tails, scraps of hide or skin, scrapings from the fleshy sides of hides, tendons, bones and collagen taken from animal parts, particularly horse hooves and bones.
Explanation:
Oof hope this helps =)
Answer:
Synthetic glues and adhesives are made from polyvinyl acetate, water, ethanol, acetone and some other substances. The water is used to modify the glue's consistency while the other substances are used to control the drying rate of the glue.
HELP
In the following acid-base reaction,
NH4+ is the
H2PO4- (aq) + NH3(aq) → HPO42- (aq) + NH4+(aq)
Answer:
C
Explanation:
The NH4^+ is the conjugate acid because it is formed from the base by accepting a proton.
Browstead - Lowry definitionAn acid base reaction can be defined according to;
ArrheniusBrownstead - LowryLewisThe NH4^+ is the conjugate acid because it is formed from the base by accepting a proton as can eaily be observed in the reaction equation as shown.
Learn more about acid base reaction: https://brainly.com/question/11256472?r
Complete the sentence. _______ have the information to build proteins.
Select one:
Segments of nucleotides called genes
Segments of DNA called RNA
Segments of DNA called genes
Segments of nucleotides called RNA
Answer:
Segments of DNA called RNA.Good luck dude
10
50.
Which of the following indicators
turns yellow in an alkaline solution
during an acid-base titration?
A.
B.
C.
D.
E.
Phenolpthalein
Phenol red
Methyl red
Methyl orange
Congo red
Answer:
Methyl orange is an indicator which turns yellow in an alkaline solution.
Answer:
i think its (methyl orange)
What is the % dissociation of a solution of acetic acid if at equilibrium the solution has a pH = 4.74 and a pKa = 4.74?
Answer:
[tex]\% diss = 50\%[/tex]
Explanation:
Hello there!
In this case, when considering weak acids which have an associated percent dissociation, we first need to set up the ionization reaction and the equilibrium expression:
[tex]HA\rightleftharpoons H^++A^-\\\\Ka=\frac{[H^+][A^-]}{[HA]}[/tex]
Now, by introducing x as the reaction extent which also represents the concentration of both H+ and A-, we have:
[tex]Ka=\frac{x^2}{[HA]_0-x} =10^{-4.74}=1.82x10^{-5}[/tex]
Thus, it is possible to find x given the pH as shown below:
[tex]x=10^{-pH}=10^{-4.74}=1.82x10^{-5}M[/tex]
So that we can calculate the initial concentration of the acid:
[tex]\frac{(1.82x10^{-5})^2}{[HA]_0-1.82x10^{-5}} =1.82x10^{-5}\\\\\frac{1.82x10^{-5}}{[HA]_0-1.82x10^{-5}} =1\\\\[/tex]
[tex][HA]_0=3.64x10^{-5}M[/tex]
Therefore, the percent dissociation turns out to be:
[tex]\% diss=\frac{x}{[HA]_0}*100\% \\\\\% diss=\frac{1.82x10^{-5}M}{3.64x10^{-5}M}*100\% \\\\\% diss = 50\%[/tex]
Best regards!
Ideal gas law:
If 6.3 moles of a gas in a 20 L cylinder have a pressure of 5.5 atm, what is the temperature?
Answer:
212. 9 degree celcius
Explanation:
From PV =nRT
T= PV/nR
T= (5. 5x20)/(6. 3x0. 082)
T= 110/0. 5166
T= 212. 9 degree celcius
Which of the following correctly labels the solute and solvent in a solution of ocean water?
Solute: Salt, Solvent: Water
Or
Solute:Water,Solvent:Salt
Hello there!
The solute is salt, and the solvent is water. So the answer is #1.
PS. Can I have Brainliest?
what electrolyte is used in a lead storage battery?
A. hydrochloric acid
B. sulfuric acid
C. lead acetate
D. lead nitrate
Answer:
Hi ,
Answer :
Sulfuric acid
why is the average number of fish species not a whole number?
Answer:
Because in order to find the average, you need to divide by the number of sites tested. Sometimes that doesn't divide evenly.
Explanation:
A graduated cylinder was filled with 25.0 mL of water. A solid object was immersed in the cylinder, raising the water level to 32.9 mL. The volume of the object was calculated as 7.9 mL. The solid has a mass of 69.2 grams. What is the density of the object?
Answer:
Density of the object is 8759.494 grams/L
Explanation:
As we know density of an object is mass of the object divided by its volume
Given
Volume of the object is equal to the change in volume of water with in the cylinder when the object was immersed in water.
Hence, volume of object is equal to
[tex]32.9 -25 = 7.9[/tex] mL
Mass of the object is [tex]69.2[/tex] grams
Density
[tex]= \frac{69.2}{7.9 *10^{-3}}\\= 8759.494[/tex] grams/L
Density of the object is 8759.494 grams/L
If a gas at 20.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its volume at a
pressure of 2.50 atm? 1.44L
Answer:
1.44L
Explanation:
P1V1/T1=P2V2/T2
since the temperature didn’t change, stay at 20celsius, we can ignore T1 and T2.T1=T2
(1.00atm)(3.60L)=(2.50 atm)V2
V2=(1.00atm)(3.60L)/(2.50atm)
=1.44L
Which compound is produced by a neutralization?
H2O(l)
HNO3(aq)
H3PO4(aq)
Ca(OH)2(s)
Explanation:
HNO3(aq) is the compound produced by a neutralization
Help please!
During which
intervals are
kinetic energy increasing?
Answer:
1
Explanation:
Because The Kinetic Energy Is Very similar to Potential Energy
Low frequency waves are ______apart. *
and heat.
4 Which increases the kinetic energy of the
particles that make up a bowl of soup?
A. dividing the soup in half
B. putting the soup in a refrigerator
C. heating the soup
for 1 min on a stove
D. decreasing the distance between the
particles that make up the soup
A compound is composed of 53.33%carbon, 11.11%hydrogen and 35.56%oxygen. If the molecular mass of the compound is 90, what is the molecular formula of this compound?
Which of the following describes how a recycling program directly benefits a community economically? The guarantee of no new landfills or incinerators O Fewer city taxes than in non-recycling communities O More potential employment opportunities and revenue O Higher property values than non-recycling communities Mark this and return
Answer:
I guess second option i.e. More potential employment opportunities and revenue because collecting recyclable material needs manpower to collect them, and secondary employment in transport i.e. to collect all the material at one place we need transport and so on!
Which person do you agree with the most?
A Casey: The human population had been fairly constant throughout
Earth's history.
Allayna: Population size is increasing at a significant rate due to
advances in technology, medicine, and sanitation.
© Karl: Population size has been decreasing over time because people
are having fewer children.
which of the following statements is not true?
A. covalent compounds have low melting and boiling points.
B. covalent bonds occur between nonmetals.
C. covalent compounds are often gases or liquids.
D. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules.
Answer:
I think option (D)is not true
To produce one or more other organisms.
1.Life cycle
2.Inherited Trait
3.Reproduce
4.Offspring
Answer:
The answer is offspring
Explanation:
