Answer:
There are three amino acids that have basic side chains at neutral pH. These are arginine (Arg), lysine (Lys), and histidine (His). Their side chains contain nitrogen and resemble ammonia, which is a base. Their pKa's are high enough that they tend to bind protons, gaining a positive charge in the process.
Hope it helps you.Answer :
arginine is basic amino acid because it's side chain group contains a full positive charge at the physiological pH. Histidine is also considered basic but it can have a positive or a neutral charge on its side chain group at the physiological pH
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How would life be different without penicillin
Answer:
Without new antibiotics, common infections and minor injuries could become life-threatening and major surgeries and chemotherapy impossible because the treatments we have been using for years are no longer effective.
Which species is the conjugate acid of the hemiacetal formed by reaction of benzaldehyde with methanol containing a trace of acid?
Answer:
Sulphuric acid is the on
Explanation:
think so
is time a fundamental quantities or units?
Answer: Its fundamental quantities
The SI is on the seven SI base units for seven base quantities.
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what is the density of a 5 mL sample of 1.95g of Gold
Answer:
density=mass/volume
=1.95/5 = 0.39 g(mL)-¹
what will I benefit or what will I gain if I know the absorbance and emission of any substance?
The density of Silver is 10.5 g/mL. How much mass would be present given a silver cube
with a volume of 25.0 mL?
PLEASE HELP ASAP
Answer:
m=dxv
= 10.5 x 965 = 10132.5 rounded off to 10100 g
Explanation:
if 10 moles of A and 7.5 moles of B are taken in a flask, identify the value of moles of A4B3 produced in a reaction.
The number of moles of A4B3 produced in a reaction is obtained by stoichiometry.
The term stoichiometry refers to mass-mole relationship. The first step in solving this problem is by writing the correct reaction equation as follows;
4A + 3B -------> A4B3
If 4 moles of A yields 1 mole of A4B3
10 moles of A yields 10 * 1/4 = 2.5 moles of A4B3
Therefore, 2.5 moles of A4B3 is produced.
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halogens can react with metals by accepting a/an____ from a metal atom and forming an ionic compound
What is the volume of 12.0 g of a liquid with a density of 1.37 g/mL?
Answer:
8.76 ml³
Explanation:
volume = mass ÷ density
10 advantages of atomic absorption spectrometer over flame photometer
Answer:
(1) It does not suffer from spectral interference, which occurs in flame emission spectroscopy.
(2) By atomic absorption technique, traces of one element can easily be determined in presence of high concentration of other elements.
The technique makes use of the atomic absorption spectrum of a sample in order to assess the concentration of specific analytes within it. It requires standards with known analyte content to establish the relation between the measured absorbance and the analyte concentration and relies therefore on the Beer–Lambert law.
Which direction does heat flow from
Answer:
A
Explanation:
hot to cold; jus took the quiz;)
Equal masses of five unknown non-electrolytes are dissolved in water and the boiling point elevations are measured. Rank the following non-electrolytes from highest to lowest molar mass.
A. Boiling point of D (aq) = 103.2 degree C
B. Boiling point of A (aq) = 102.4 degree C
C. Boiling point of E (aq) = 101.3 degree C
D. Boiling point of B (aq) = 101.9 degree C
E. Boiling point of C (aq) = 100.5 degree C
0.5 mole of Na2SO4 x 10 H2O consists of what
Answer:
» It contains two atoms of sodium sulphate
» It contains 10 molecules of water.
How can the Swartz process be modified to work for bacteria? Explain.
Answer:
https://swartzbiotechnologylab.sites.stanford.edu/research
Explanation:
Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.
Swartz reaction?Frederick Jean Edmond Swarts first reported this procedure in 1892. Heating the alkyl chloride or alkyl bromide in the presence of heavy metal fluorides like AGF, Hg2F2, CoF2, or SbF3 causes this reaction.
Swartz process can be used to modify work for bacteria. Bacterial biofilms are collections of microorganisms where the cells are immersed in an extracellular polymeric matrix that the bacteria have self-produced.
In contrast to planktonic bacteria, which are in a state of free movement in a bulk solution, this situation is very different.
Applications:
In this process, alkyl fluorides are created.Fluorinated aliphatic organic molecules, or Freons, are produced via a different variation of the same process.Anhydrous hydrogen fluoride is fluorinated to produce Freons in the presence of antimony salts, which exhibit the oxidation states +3 and +5.Therefore, Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.
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How many square centimeters are in an area of 5.90 inch^2 ?
Answer:
38.0644 cm^2
Explanation:
5.90 ×6.451 cm^2PLEASE SOLVE THIS QUESTION.
VERY MUCH IMPORTANT
Answer:
[tex]thank \: you[/tex]
How does the volume occupied by a cubic centimeter (cm3) compare with the volume occupied by a milliliter
Answer:
One cubic centimeter is equal to one milliliter. Cubic centimeter is used interchangeably with millimeter. Centimeter belongs in the CGS unit system (centimeter-gram-second system) while liter belongs in the SI (Système International d'Unités) unit system. These two are equal.
Explanation:
The lines of latitude are measured
from a line at the center of the Earth
called the
Answer:
parallels
Explanation:
hope it may help you
CHAPTER 8 FORCE AND MOTION
Choose the S.I. unit for pressure.
1. Watt
2. Joule
3. Pascal
4.Newton
how to find the average speed of something
Answer:
if you want to find average speed so u need to use this formula
Average speed = [tex]\frac{Total Displacement}{Total Time}[/tex]
The atomic size of atoms ________. A) increases going across a period B) decreases going down within a group C) increases going down within a group D) does not change going down within a group
Answer: my answer is A) increases going across a period
Explanation: because of it nuclear charge as it increases going across a period
HOPE THIS HELPSSSSS!!
lidocain có tính bazơ không
Answer:
Lidocain là cơ bản.
Tôi hy vọng câu trả lời của tôi là hữu ích cho bạn.
Which of the following is a result of increasing the temperature of a system that includes a reaction in the forward direction that is exothermic?
a) The equilibrium constant decreases.
b) The concentrations of the products increase.
c) The equilibrium constant increases.
d) The concentrations of the reactants decrease.
Answer:
I believe the answer your looking for is out of A or B
Explanation:
Option B because if the heat increases its essentially causing the concentration to increase by replacing the weak bonds with stronger ones
In increasing the temperature of a system that includes a reaction in the forward direction that is exothermic, the concentration rises as weak bonds are replaced by stronger ones.
What is the temperature of a system?The average kinetic energy of the atoms or molecules in a system is measured by temperature. No heat is transmitted between two objects in thermal equilibrium, according to the zeroth law of thermodynamics.
In conclusion, as the temperature of the system rises, the concentration rises as weak bonds are replaced by stronger ones.
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Acrylonitrile and ethyl acetate have the same boiling point: 77.2ºC. In one to two sentences, explain what outcome you would expect if a mixture of these two substances were distilled (SHORT ANSWER)
Acrylonitrile and ethyl acetate will be collected together since they both have the same boiling point.
The method of distillation highly depends on the difference between the boiling points of the Acrylonitrile and ethyl acetate.
Since they have the same boiling point, the two substances turn into vapor at the same temperature and are collected simultaneously.
Hence separation is not achieved by distillation.
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Answer:
They would boil at the same rate. Basically meaning, that they would both be finished distilling at the same time.
Explanation:
This is what I put (this is for you to revise and it has not been graded yet DO NOT CHEAT with this answer just take in the info and revise it)
Please help!!! Question 1 to 8
Answer:
1) C - 30
2) A - MgO
3) C - 3Cu + N2 + 3H2O
4) C - 100
Explanation:
The ideal gas constant R can be denoted as _______.
A. R = 9.315 (Pa × m3) / (mole × K)
B. R = 9.315 J / (mole × K)
C. R = 0.0821 (L × atm) / (mole × K)
D. All of the Above E. None of the Above
In a fission reaction a 235U nucleus captures a neutron. This results in the products 141Ba and 92Kr along with how many neutrons?
A. 1.
B. 2.
C. 3.
D. 5.
The allele for dimples is dominant and the allele for no dimples is recessive. If two parents that are heterozygous for dimples produce a child, what are the chances the child will have dimples? A. 25% B. 50% C. 75% D. 100%
The chances the child will have dimples is 50%. Hence The correct option is (B).
What is Heredity ?Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.
There is a 50% chance that the child does not obtain the allele needed for dimples (dd), and a 50% chance that the child is heterozygous (Dd). Because dimples is an autosomal dominant trait, heterozygosity will express dimples, leading to a 50% chance that the child will have dimples.
Therefore, The chances the child will have dimples is 50%. Hence The correct option is (B).
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3(b) The balloon did not burst when it is pressed onto 100 nails because
1. the nails are not sharp
2.the surface area of 100 nails produce high pressure on the balloon
3. the larger surface area of 100 nails produce low pressure on the balloon
3(c) To reduce pressure on the contact surface, we must apply force onto the .................... surface area.
1.largest
2.smallest
3. Any size of
Who developed the gas law that relates pressure and temperature?
Explanation:
physicist Robert Boyle
Answer: Boyle
Explanation: Educere Answer