Reaction of cyclin, mitotic promoting factor or maturing-promoting factor catalyzes the phosphorylation of receptor superfamily of cyclin-dependent kinases.
In relation to protein kinases, each of the following claims is untrue?They remove diphosphate form proteins is the response that is untrue. Proteins do not lose phosphate groups when they are added by kinases. The enzymes known as phosphatases are in charge of removing phosphate groups off proteins. The other claims made concerning protein kinases are all accurate.
Which one of the following sentences concerning cyclin cdk is untrue?Option d is the erroneous statement. Throughout the cell cycle, CDK levels fluctuate. Throughout the cell cycle, each CDK is present in the same quantity. However, each CDK's activity is reliant on the other.
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Based on the Law of Conservation of Mass, what mass of products form when baking soda decomposes?
NaHCO3 → Na₂CO3 + H₂O + CO₂
Give your answer to the correct number of significant figures.
(g) Sodium Chloride = [?]
Based on the Law of Conservation of Mass, the mass of products form when baking soda decomposes is 168 g/mole.
What is law of conservation of mass?The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.
From the equation of NaHCO3 → Na₂CO3 + H₂O + CO₂ , we have
Mass of baking soda = 2 x molar mass
Molar mass of NaHCO₃ = 84.007 g/mole
Mass of baking soda = 2 x 84.007 g/mole
Mass of baking soda = 168.014 g/mole= 168 g/mole
Therefore, based on the Law of Conservation of Mass, the mass of products form when baking soda decomposes is 168 g/mole.
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Pearson Education Chapter 4 Covalent Bonds quiz [ Just Send Me A Image of it or write it down ]
Covalent bond is a bond which is formed by the sharing of electrons between the two atoms.
What is a covalent bond?
Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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Which model most accurately represents the current view of the structure of the atom? Planetary Model Probability Model Planetary model
Probability model
With regard to the current understanding of atom structure, that planet best captures the model.
Describe an atom.A chemical element's atom is a particular type of particle of substance. A positively charged electron or many negatively charged electrons encircle the central nucleus of an atom. Protons and neutrons, two relatively hefty particles that make up the positively charged nucleus, may be present.
What is the cause of Atom's shutdown?We have chosen to abandon Atom in order to enhance our dedication to bringing quick and dependable application development to the cloud using Microsoft's Visual Code and GitHub Codespaces, even though the goal of expanding the software maker community still exists.
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A dog's cells carry out many processes at once. Some cells are involved in muscle contraction and some are involved in growing fur.
Which statement tells the most important factor that allows cells to keep accomplishing their many processes?
Cells constantly produce usable energy in the form of ATP
Cells contain genes from two individuals, and the combination of genes result in genetic variation
New cells are always being made from old ones in the process of meiosis.
The phospholipid bilayer of the cell membrane is selectively permeable.
The statement that tells the most important factor that allows cells to keep accomplishing their many processes is A. Cells constantly produce usable energy in the form of ATP
How are cells able to accomplish their processes?ATP (adenosine triphosphate) is the primary energy currency of cells. It is used to power the many chemical reactions that take place within cells, including things like muscle contraction, nerve impulse conduction, cell growth and division, and the transport of molecules across cell membranes. Without a constant supply of ATP, cells would not be able to carry out these processes and would quickly die.
The combination of genes from two individuals resulting in genetic variation is also important, but it is more related to the diversity of living organisms and its evolution than to the basic functions of the cells.
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Determine the average rate of change of B from t=0 s to t=262 s
A=2B
Time (s)= 0, 131, 262
Concentration of A (M)= .720, .420, .120
The average rate of change of B from t=0 s to t=262 s is -0.00114 M/s
How to find the average rate of change?To determine the average rate of change of B, we need to calculate the change in B over the given time interval (0 to 262 seconds), and then divide by the time interval.
A = 2B
Therefore, B = A/2
At t = 0s, B = .720/2 = .360 M
At t = 262s, B = .120/2 = .060 M
The change in B is thus:
change in B = B(t=262s) - B(t=0s) = .060 - .360 = -.300 M
The average rate of change of B over the time interval from t = 0s to t = 262s is:
average rate of change = change in B / time interval = (-.300 M) / (262 s - 0 s) = -.300 M/262 s = -0.00114 M/s
So the average rate of change of B from t=0 s to t=262 s is -0.00114 M/s
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if you done this may i please get help asap!!!thanks
Answer:
Explanation:
Damien Gilley. ... Leandro Erlich. ... Tang Yau Hoong. ... Erik Johansson. ... Julian Beever. ...
In a highly basic solution, pH = 13, the dominant form of glycine is: NH2—CH3+—COO-.
The predominant form of glycine in a strongly basic solution with a pH of 13 is NH2—CH3+—COO-. For amino acids with neutral R groups, the population of amino acids in solution will have a net positive charge at any pH below the amino acid's pI.
Are there D and L forms of glycine?A flexible addition that prevents protein aggregation during refolding, heat treatment, and crystallization is glycine amide (GlyAd), an usually amidated amino acid.
Since it is the only amino acid without a chiral carbon atom, glycine is the simplest and smallest and has a hydrogen atom as a side chain. As a result, it does not produce stereoisomers and does not have the L or D configurations found in other amino acids.
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Suppose two systems, each composed of three particles represented by circles, have 30 J of total energy.
System A 10 J ooo −−−−−−
System B 12 J o −−−−
10 J o −−−−
8 J o −−−−
How many energetically equivalent ways can you distribute the particles in system A?
How many energetically equivalent ways can you distribute the particles in system B?
Entropy, S, is a thermodynamic function that rises with the degree of freedom (number of energetically equivalent ways to arrange the components).
Entropy: What Does It Mean?Entropy is a scientific concept and observable physical feature that is commonly related to a state of chaos, unpredictability, or uncertainty. Since labor is created by organized molecular motion, entropy measures the molecular disorder or unpredictable nature of a system.
How many distributions of the particles in system B are there that are energetically equivalent?In system B, there are three distinct energy levels. To maintain the overall energy of 30 J, each particle can only occupy one energy level. By rearranging the particles among the layers, one may count how many equivalent ways there are.
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Consider the fire fighting measures shown. Why does sodium require a Class D fire extinguisher instead of one that might spray water?
A. It may create table salt, sodium chloride.
B. The sodium will react with the water, creating an acid.
C. A regular fire extinguisher might break the sodium down.
D. The sodium will react with the water, causing a flash fire.
Answer:
D
Explanation:
yurr
Rank the following atmospheric pollutant gases in order of increasing root-mean-square speed. Question List (4 items) (Drag and drop into the appropriate area) No more items RMS speed order
Because root mean square velocity '=((3RT)/(M))(1/2)', CO' gas is a gas. For example, "RMS prop ((1)/(M))(1/2)" The highest "RMS" velocity is exhibited by "CO," which has the lowest molecular mass.
Alternating currents and voltages are one of the main areas where RMS values are applied. An AC voltage's value continuously fluctuates between zero and its positive peak, through its negative peak, and back to zero. The RMS value is the accurate measurement of a fluctuating voltage or current. The square root of the temperature and the molar mass have direct and inverse relationships with the rms velocity, respectively. Thus, increasing the temperature of a gas by fourfold causes the molecules' average motion to double.
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What is [H1+] in a solution prepared by mixing the following solutions
12.5 mL of 2.30 M HCl
27.8 mL of 3.60 M HCl
18.2 mL of 6.90 M HCl
15.0 mL of water
Protium, an isotope of hydrogen, contains the hydrogen atom (H1). An interstellar cloud called the H I region.
How many protons are in H1?Community of British NVC H1, an area of health. An isotope of hydrogen, the hydrogen atom (H1) protium, is present. In the interstellar medium, a cloud called the H I zone. CTA code H01 Anatomical Therapeutic Chemical Classification System subclass: Pituitary and hypothalamic hormones and analogues.
Water and organic compounds are two examples of molecules that contain the majority of the hydrogen that exists on Earth. One proton, one electron, and no neutrons are present in each atom of the most prevalent isotope of hydrogen (symbol 1H).
It is officially referred to as protium because this isotope's nucleus only contains one proton. Hydrogen-1 is regarded as a stable isotope because the proton's decay has never been detected.
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What is the chemical formula for the ionic compound whose unit cell is shown? (A and B are cations; X is an anion.)
The chemical formula is AB3X, A occupies all the corners & B occupies the faces, So the contribution = ½ × 6 = 3 . X occupies body center So contribution= 1,So atomic formula= AB3X
What is Chemical formula?
A chemical formula is a way of presenting information about the chemical ratios of atoms that make up a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes other symbols such as parentheses, dashes, parentheses, commas, and plus and minus signs
What is chemical compound?
A chemical compound is a chemical substance composed of two or more different chemical elements held together by chemical bonds. It can be either a molecular compound composed of atoms held together by covalent bonds, or an ionic compound composed of ions held together by ionic bonds. Compounds can be composed of elements from the same group, or from different groups.
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How many of the following molecules contain at least one pi bond?
C2H6 Cl2CO C2Cl4 CS2
3 is the number of the following molecules contain at least one pi bond.
What makes a pi bond?Pi bond (π bond) : A link that is created when the p orbitals of two nearby atoms cross, perpendicular to any sigma bonds that may also exist between the same atoms. a second line that runs parallel to the line that symbolises the sigma bond in a Kekule structure or bond-line structure.When two lobes of an orbital on one atom overlap with two lobes of an orbital on another atom, a covalent chemical connection known as a pi bond is formed. This overlap happens laterally.The electron density is concentrated above and below the plane of the nuclei of the bonding atoms, and the orbitals overlap side by side to create a pi bond ( bond).Learn more about pi bond refer to :
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why am i so black
(What is melanin and how does it work)
Answer:
you are a monkey JK
melanin is DARK SIR
Explanation:
heheh
How many moles of ammonia gas (NH3) would occupy a 0.43L container at STP
Answer:
0.0192 moles
Explanation:
One mole of any gas occupies 22.414 L at S.T.P
setting up mole and volume ratio;
mole : volume
1 : 22.414
X : 0.43
X = 0.43/22.414
X = 0.0192 moles
How many of the following molecules have sp hybridization on the central atom?
C2Br2 CS2 O3 H2S
A) 3
B) 1
C) 2
D) 0
2 – C2H6 and HCN O 4 contain at least one pi bond.
What is molecules?Molecules are the smallest unit of any chemical element or compound that has the properties of that substance. They are made up of atoms bonded together in various combinations, and have a definite chemical structure and composition. Molecules can be made up of single atoms, such as oxygen (O2), or of different types of atoms, such as water (H2O). Molecules are the building blocks of all matter, and are the basis of all living and non-living things.
C2Cl4 and Cl2CO do not contain any pi bonds. Pi bonds are formed by the overlap of atomic orbitals between two atoms. C2H6 and HCN O 4 contain double bonds between the atoms, which are made up of pi bonds. C2Cl4 and Cl2CO do not have any double bonds, so they do not contain any pi bonds.
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Which of the following has an effect on the magnitude of the equilibrium constant?
a. increasing the pressure, in a gas-phase reaction
b. adding more of a reactant
c. change in temperature
d. adding a catalyst
e. removing products as they are formed
The following has an effect on the magnitude of the equilibrium constant: c. change in temperature.
What has effect on the magnitude of equilibrium constant?The only thing that changes an equilibrium constant is the change of temperature. Position of equilibrium is changed if you change the concentration of something present in mixture.
Increasing the temperature decreases value of the equilibrium constant. When the forward reaction is endothermic, increasing the temperature increases the value of equilibrium constant. And position of the equilibrium also changes if you change the temperature.
Catalyst does not affect the chemical equilibrium and it only speeds up a reaction.
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Which of the following molecules or ions will exhibit delocalized bonding?
NO2- , NH4+ , N3-
N3- (nitride ion) is the molecule or ion that will exhibit delocalized bonding.
Delocalized bonding occurs when electrons are distributed over more than one atom in a molecule or ion. It is a type of bonding that is different from the traditional localized bonding, where electrons are associated with specific atoms. Delocalized electrons can move freely across the entire molecule or ion, making it more stable and less reactive.The Nitride ion (N3-), is an example of a molecule that exhibits delocalized bonding. In N3-, the electrons from the three nitrogen atoms are delocalized, creating a stable and less reactive species.
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What volume of 0.500 M HCl is needed to reach the first equivalence point?
A 1.00-g sample of piperazine hexahydrate is dissolved in enough water to produce 100.0 mL of solution and is titrated with 0.500 M HCl.
pKb1=4.22
pKb2=8.67
The Ph at the first equivalence pt is 7.56.
The goal of the titration is to identify the equivalence point, or the point at which chemically equivalent amounts of the reactants have been combined.
What do you mean by titrated?According to the definition of titration, it is "the method of estimating the amount of a material A by adding calibrated increments of substance B, the titrant, with which it reacts until exact chemical equivalency is obtained (the equivalence point)".
Titration is a method of chemical analysis where the amount of a sample's ingredient is determined by adding an exact known amount of a different substance to the measured sample, which the desired constituent reacts with in a specific, known proportion.
The equivalence point, or the point at which chemically equivalent amounts of the reactants have been combined, is to be found through titration. Depending on the stoichiometry of the reaction, the number of reactants that have been combined at the equivalence point.
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Arrange calcium, rubidium, sulfur, and arsenic in order of decreasing electronegativity.
S > As > Rb > Ca
As > S > Ca > Rb
As > S > Rb > Ca
S> As > Ca> Rb
None of these orders is correct.
Difference In order to reduce our rough electro-negative, we must add arsenic, sulfur, rubidium, and calcium. If we follow the predictable sequence, all the participants are here in the 16th group, followed by arsenic in the 15th group, calcium in the second group, and rubidium in the first group.
And we know that electron density rises from the left to the right based on periodic trends. Negativity in elections rises from left to right. found in the periodic table. Accordingly, the elements on the left are more lateral positive and less slightly negative, while the elements on the right are more slightly negative and less electorally positive. Sulfur is therefore at the utmost level right if we walk through them. sulfur follows.
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(D.) S> As > Ca> Rb, If calcium, rubidium, sulphur, and arsenic are arranged in decreasing sequence of electronegativity, S> As > Ca> Rb results.
The capacity of an atom to draw a pair of bound electrons determines its electronegativity. The Pauling scale is the most often applied. Cesium and francium have values that are less electronegative than fluorine, which is given a value of 4.0. From top to bottom, the electronegativity decreases, and from left to right, it gradually increases. Fluorine is consequently the element with the highest electronegative potential, whilst francium is one of the lowest. An atom's or functional group's propensity to draw electrons to itself is known as electronegativity, which is a chemical characteristic.
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How many protons are in an isotope of sodium with a mass number of 25? M1 B) 14 C) 15 D) 25 E) 32
There are 11 protons in an isotope of sodium with the mass number of 25.
What is meant by isotopes?Atoms with same number of protons but different numbers of neutrons are called as isotopes. They share almost the same chemical properties, but have different masses and therefore physical properties.
Isotopes are atoms belonging to same element, having same atomic number Z, but different mass number A. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of element carbon with mass numbers as 12, 13 and 14 respectively. How do you identify an isotope?
Generally, isotopes are specified by the name or symbol of the particular element and immediately followed by a hyphen and mass number.
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Can a voltaic cell in which both half-reactions are the same generate a current? Yes, as long as any two half-cells are connected by a salt bridge, a current will flow. Yes, if there is a difference in concentration of the ion between the two half-reactions No, if there is no difference in standard cell potential between the half-reactions, there can be no driving force for electrons to flow Yes, electrons always flow toward the electrode with the more positive standard reduction potential
Yes. It is possible. This is known as a concentration cell and each half ion cell should have a different concentration. Correct option: b
What is a gray cell?A galvanic (or voltaic) cell, called a concentration cell, consists of two half-cells with the same electrodes, but with different densities. Concentration cells attempt to achieve equilibrium by transferring electrons from cells of lower concentration to cells of higher concentration. An electrolytic cell with two half-cells with the same electrodes but different concentrations is called a concentrated cell. A concentration cell concentrates a more diluted solution while diluting a more concentrated solution. As the cell approaches equilibrium, a voltage develops.
Yes, if there is a difference in concentration of ions between the two half-reactions.
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The complete question is as follows:
Can a voltaic cell in which both half-reactions are the same generate a current?
Yes, as long as any two half-cells are connected by a salt bridge, a current will flow.
Yes, if there is a difference in concentration of the ion between the two half-reactions.
No, if there is no difference in standard cell potential between the half-reactions, there can be no driving force for electrons to flow.
Yes, electrons always flow toward the electrode with the more positive standard reduction potential.
Which element is oxidized in the reaction below>I- + MnO4- + H+ -> I2 + MnO2 + H2O
a) I
b) H
c) O
d) Mn
I is the element which is oxidized in the given reaction. Therefore, the correct option is option A.
An atom, ion, or molecule undergoes oxidation when one of its electrons is lost or its oxidation status is raised. It can be identified by the oxidation number of an element rising, the removal of hydrogen, the loss of electrons, or the addition of oxygen.
[tex]\rm I^- + MnO_4^- + H^+ \rightarrow I_2 + MnO_2 + H_2O[/tex]
Oxidation state on reactant side are:
The oxidation state of the iodide ion ([tex]\rm I^-[/tex]) is 1.
The oxidation state of the permanganate ion ([tex]\rm MnO_4^-[/tex]) is +7.
The oxidation state of the hydrogen ion ([tex]\rm H^+[/tex]) is 1.
Oxidation state on product side are:
Iodine ([tex]\rm I_2[/tex]) has an elemental state with oxidation state 0.
With an oxidation state of +4, manganese dioxide ([tex]\rm MnO_2[/tex]) is a metal.
The oxidation state of water ([tex]\rm H_2O[/tex]) is -2 for oxygen and +1 for hydrogen.
Iodine has undergone oxidation because its oxidation state went from -1 to 0.
Therefore, the correct option is option A.
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A. river
C. alpine
This glacier
originated high in
the mountains.
What type of
glacier is it?
B. island
D. sailing
Alpine glaciers create or widen valleys by ejecting dirt and other objects in their path. Aside from Australia, they are spread across every landmass in high piles.
What kind of landmass is that?
An landmass is a group of land that is typically divided by an ocean, causeway, or canal. America and Latin America, which are divided by a canal, are two examples of landmasses. It is possible to extend this brief article about a location or feature.
What is the world's largest landmass?
The largest continent, Asia, runs from the western Pacific Ocean to the eastern Mediterranean Sea. Asia is home to more than 40 nations. China, India, and Indonesia are a few of the most populous nations on the planet.
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is h2o2 fixed product of alkyen in ozone analysis ??
H2O2 (hydrogen peroxide) is the reagent to look out for because as seen below it turns:
- Ends of alkenes with 1 –H = Aldehydes but Carboxylic Acids instead
What is pseudoscience? How is it different from non-science?
Pseudoscience is described as consisting of statements, beliefs, or practices that claim to be both scientific and factual but are incompatible with the scientific method.
The main difference between Pseudoscience and non- science is that pseudo-science is set up to look for evidence that supports its claims, while non-science do not look for evidence that might prove it false.
What is Pseudoscience?Pseudoscience is described as a proposition, a finding or a system of explanation that is presented as science but that lacks the rigor essential to the scientific knowledge.
A non-science on the other hand is an area of study that is not scientific, especially one that is not a natural science or a social science that is an object of scientific inquiry.
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An experiment will
start with 15g of
carbon and 75g of
oxygen. What is the
predicted mass of the
product?
Only when the masses of the reactants and products are equal can a chemical reaction occur.
How do you predict the mass of a product?Product mass is equal to reactant mass. The term "moles" should be inserted between each coefficient and formula so that the equation can be read in "moles." An equation's "mole-mole factor" is the ratio of the moles of any two substances.
A chemical reaction can only take place if the mass of the reactants and products are equal. Therefore, if you start with a specific mass and it interacts, the products will have the same mass.
Examine what transpires when the chemical splits into smaller, more recognizable products like water, carbon dioxide, or any of the gaseous elements in order to forecast the outcomes of such a reaction. Synthesis reactions frequently happen when pure elements are mixed.
The complete question is:
An experiment will start with 15g of carbon and 75g of oxygen. What is the predicted mass of the product?
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A thief plans to steal a gold sphere with a radius of 28.1 cm from a museum. If the gold has a density of 19.3 g/cm3 , what is the mass of the sphere in pounds? [The volume of a sphere is V=(4/3)πr3 .]
Express your answer in pounds to three significant figures.
The gold sphere has a radius of 92893 cm³. The mass of the sphere is 1.7 × 10⁶ g which is equal to 3585 pounds.
What is density?Density of an object is the measure of its mass per unit volume. It describes how closely its particles are packed. Density is the ratio of mass to the volume.
Gold is dense solid with a density of 19.3 g/cm³.
radius of the sphere = 28.1 cm
Volume of the sphere = 4/3 πr³
V = 4/3 π (28.1 cm³) = 92893 cm³
Mass of the sphere = volume × density
= 92893 cm³ × 19.3 g/cm³
= 1.7 × 10⁶ g
1 g = 0.02 pounds
then 1.7 × 10⁶ g = 1.7 × 10⁶ × 0.022 = 3585 pounds
Therefore, the mass of the sphere is 3585 pounds.
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In what forms are you more likely to see the density of a gas reported? Select all that apply. g/L g/cm2 g/mL kg/cm3 Part B Which units are appropriate for expressing atmospheric pressures? Select all that apply. atm N Pa kg/m2 Part C Which is most likely to be a gas at room temperature and ordinary atmospheric pressure? Select all that apply. F2 Br2 H2O K2O
At room temperature and ordinary atmospheric pressure, the density of a gas is normally stated in g/L or g/mL, atmospheric pressures are typically expressed in atm or Pa, and [tex]\rm F_2[/tex] and [tex]\rm Br_2[/tex] are likely to be gases.
The density of a substance is a measure of how much mass it has in a given volume.
Part A: The density of a gas is typically reported in g/L or g/mL. These units express the mass of the gas per unit volume.
Part B: Atmospheric pressures are typically expressed in atm or Pa (pascals). These units measure the force exerted by the atmosphere per unit area.
Part C: [tex]\rm F_2[/tex] and [tex]\rm Br_2[/tex] are both likely to be gases at room temperature and ordinary atmospheric pressure, as they are both diatomic molecules with low boiling points.
Therefore, the density of a gas is typically reported in g/L or g/mL, atmospheric pressures are typically expressed in atm or Pa, and [tex]\rm F_2[/tex] and [tex]\rm Br_2[/tex]are likely to be gases at room temperature and ordinary atmospheric pressure.
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Your question is incomplete but most probably your full question was,
Part A: In what forms are you more likely to see the density of a gas reported? Select all that apply. g/L, g/cm2, g/mL and kg/cm3
Part B: Which units are appropriate for expressing atmospheric pressures? Select all that apply. atm, N, Pa and kg/m2.
Part C: Which is most likely to be a gas at room temperature and ordinary atmospheric pressure? Select all that apply. [tex]\rm F_2, Br_2, H_2O\ and\ K_2O[/tex]
Borane (BH3) is very unstable and quite reactive.
1- explain the source of instability.
The central boron atom lacks an ........of electrons, and it is therefore very unstable and reactive.
BH3 is an unstable compound because: Bh3 molecule is an electron deficient molecule in nature since the 6 electrons are around the 'B' atom.
Why is borane very unstable?Because of its Lewis acidic nature, borane is very reactive. This indicates that it is easily able to receive electrons from other molecules, making it extremely vulnerable to reactions.
The extreme instability of the chemical borane further adds to its reactivity. It's not unstable, BH3. As you may recall, sp3 forms four bonds and is generally more energetically stable than sp2, which has a planar shape.
Therefore, like in NH3, a single pair with roughly the proper amount of energy can activate the fourth bond. To learn more about boranes and its qualities, read the article. Because it has an open orbital, borane is a Lewis acid. Borane is a chemical that is highly reactive, rapidly ignites in the air, and reacts with water.
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