Option D. One strand is new and the other is from the original molecule, about the strands of a newly replicated DNA molecule is correct
Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around every different to form a double helix wearing genetic commands for the development, functioning, growth, and reproduction of all recognized organisms and plenty of viruses. DNA and ribonucleic acid are nucleic acids.
DNA replication is the organic manner of manufacturing two equal replicas of DNA from one unique DNA molecule. DNA replication happens in all dwelling organisms appearing because the most important part of biological inheritance
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Disclaimer:- your question is incomplete, please see below for the complete question.
Which of the statements about the strands of a newly replicated dna molecule is correct?.
A. Both strands contain some nucleotides from the original molecule.
B. The sugar-phosphate chains are conserved and new bases are inserted between them.
C. The base pairs are conserved and new sugar-phosphate backbones are built upon them.
D. One strand is new and the other is from the original molecule.
E. Both strands are made up of newly assembled nucleotides.
What is the percent by mass if 8. 0g copper is added to enough zinc to produce 100g an alloy.
The percent by mass of copper to alloy is 8.0%.
The relative proportions of each element in a compound are shown by the percent composition. The formula for mass percent for each element is:
mass percent = (Mass of Solute / Mass of Solution) x 100%
Typically, grams are used as the unit of mass. The term mass percent is sometimes referred to as weight percent or w/w%. The total mass of all the atoms in a mole of the compound is the molar mass. The total of all the mass percentages ought to equal 100 percent.
We know that,
the percent by mass = (mass solute/mass solution) × 100
Given,
Mass of copper = 8.0g
Mass of alloy = 100g
the percent by mass = (8.0 g / 100 g) × 100
percent by mass = 8.0%
Thus, the percent by mass of copper to alloy is 8.0%.
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Assuming that the pauli exclusion principle remains valid in the distant universe, what is the maximum number of electrons that can populate a given orbital there?.
The maximum number of electrons that can populate a given orbital is two assuming that the pauli exclusion principle remains valid.
What is pauli exclusion principle and what is the maximum number of electrons that can populate a given orbital there?Pauli exclusion principle which was discovered by pauli states that no two electron in the same atom can have same values for the quantum numbers.Here the question is asked of the maximum number of electrons that can populate a given orbital there.Assuming that the pauli exclusion principle remains valid in the distant universe the maximum number of electrons that can populate a given orbital is 2 .Pauli exclusion principle also states that no two electrons in a solid have same energy states.Hence there are two electrons maximum that can populate the orbital assuming the pauli exclusion principle remains valid.To know more about electrons visit:
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How do you measure pH strength?.
The pH strength is measured by measuring pH using an indicator, hydrogen-electrode method, quin hydrogen-electrode method
The pH scale ranges from the scale of 0 to 14 in water. pH 7 is called as neutral state. Solution ranging the pH value from 0 to 7 comes under the acidic state.
The methods for measuring pH are categorized in five categories:
Indicator methodsMetal-electrode methods (including the hydrogen-electrode method, quin hydrogen-electrode method and the antimony-electrode method) Antimony-Electrode Method Glass-Electrode MethodSemiconductor sensor methodspH is represented by the following equation:
pH= -log[H⁺] where H⁺ is the concentration of H⁺ ion in the solution.
If a solution has lower pH value, then it is more acidic in nature.
pH value of normal water is around 7.
pH value of sodium hydroxide is near to 14.
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The calcium carbonate found in limestone was originally extracted from _______. a. seawater b. shale c. magma d. silt please select the best answer from the choices provided a b c d
Originally, a. seawater was used to remove the calcium carbonate that is present in limestone.
Why does evaporation occur?Evaporation is the process by which an element or compound changes from its liquid state to its gaseous state below the temperature at which it boils. In the water cycle, this is how liquid water enters the atmosphere as water vapour.
It is a sedimentary rock, limestone. It was created from tiny rock or stone fragments that were compressed under pressure. It can be created either through evaporation or by living things.
Corals, clams, and oysters are just a few examples of the ocean-dwelling species that employ calcium carbonate in saltwater to build their shells and bones. When these organisms pass away, the waves shatter their shells and bones, which land on the ocean floor where the pressure of the water pushes the sediments together to form limestone.
Evaporation is the process that produces limestone. When calcium carbonate-containing water evaporates, it leaves behind a sediment deposit that, when put under water pressure, turns into limestone.
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PLEASE HELP CHEMISTRY
When sodium carbonate is dissolved in water, the equation is [tex]Na_2CO_3 (s) --- > 2Na^+ (aq) + CO_3^{2-} (aq)[/tex].
When carbon dioxide is placed in water, aqueous carbon dioxide is formed: [tex]CO_2 (g) --- > CO_2(aq)[/tex]
Dissolution of compounds in waterSome compounds are water-soluble, some are just partially soluble, while others are insoluble in water. Some soluble or partially soluble substances dissociate in water into their component ions. These substances are said to be ionic.
Sodium carbonate, like every other sodium salt, is soluble in water. It dissolves in water to form an aqueous solution of sodium carbonate.
While in solution, sodium carbonate dissociates into its component ions according to the following equation:
[tex]Na_2CO_3 (s) --- > 2Na^+ (aq) + CO_3^{2-} (aq)[/tex]
Carbon dioxide, on the other hand, does not dissociate in water. Instead, it dissolves in water where most of it remains as aqueous carbon dioxide in equilibrium with a small amount of hydronium ion and hydrogen carbonate ion.
Since the hydronium and hydrogen carbonate ions formed are so minute, the equation of the reaction can be written as: [tex]CO_2 (g) --- > CO_2(aq)[/tex]
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a 1:4 mixture containing codeine sulfate, with lactose as an inert diluent, is prepared. how many milligrams of lactose (the diluent) are present in 1.25 g of the mixture?
The mixture contains 250 mg of lactose as diluent.
Total mixture = 1.25 g
1x + 4x = 1.25 g
5x = 1.25g
x = 1.25 / 5
x = 0.25 g
lactose = 0.25 g = 250 milligram.
Thus in the mixture containing codeine sulfate, with lactose as an inert diluent, 250 mg of lactose is present.
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how does salt help the electrolysis process
In order for electrolysis to take place, a salt such as Na2SO4 is required. It makes available the ions Na+ and SO42, both of which are drawn to the electrodes in the solution and move toward them as a result. They do not experience a discharge when brought close to the electrodes. However, they are able to cancel out the electric charges carried by the ions that are formed as a result of the destruction of water by these electrodes. Let's check out what's happening at each of the electrodes.
At the cathode, often known as the negative pole, water breaks down in the following manner:
2H2O+2e−⟶H2+2OH−.This is only conceivable if some positive ions are available near the cathode to compensate for the negative charges emerging in the solution with these freshly produced OH ions. The only way this can happen is if there are some positive ions available near the cathode. In the absence of positive ions, such as Na+, in the vicinity of the cathode, the newly formed OH ions would function as a barrier to subsequent electrons coming from the external circuit, preventing those electrons from reaching the electrode and preventing the electrode from interacting with water. The electrolysis would come to a halt as a result.
At the anode, often known as the positive pole, the following reactions take place in water:
4H2O⟶O2+4H++4e− .This is only conceivable if there are negative ions coming near the anode to compensate for the positive charges that are forming in the solution as a result of these freshly produced H+ ions. A positively charged solution would result if the solution near the anode did not include any negative ions, such as SO42. Instead, the solution would contain the new H+ ions. This would stop any further electrons from being released from the water as a result. The electrolysis would come to a halt as a result.
The process culminates in a transformation of the solution's chemical makeup near the electrodes. When you go closer to the cathode, you'll notice that the solution has a higher concentration of NaOH. In the vicinity of the anode, the solution includes an increasing amount of H2SO4. Naturally, if you agitate and combine solutions that are anodic and cathodic, the acid and the base will neutralize each other, which will result in the solution being regenerated to contain the initial salt.
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which answer choice shows the correct ratio of moles ni:po43- for the reaction of aqueous nicl2 with na3po4?
The correct ratio of moles of Ni²⁺ : PO₄³⁻ is 3 : 2.
The reaction of Na₃PO₄ and NiCl₂ is given as :
Na₃PO₄ + NiCl₂ ----> Ni₃(PO)₂ + NaCl
The balanced chemical equation between the Na₃PO₄ and NiCl₂ is given as :
2Na₃PO₄ + 3NiCl₂ ----> Ni₃(PO)₂ + 6NaCl
The complete ionic equation between the Na₃PO₄ and NiCl₂ is given as :
6Na⁺ + 2PO₄³⁻ + 3Ni²⁺ + 6Cl⁻ --> Ni(PO₄)₂ + 6Na⁺ + 6Cl⁻
from the above equation it is clear that ratio of moles of Ni²⁺ : PO₄³⁻ is
3 : 2.
Thus , The correct ratio of moles of Ni²⁺ : PO₄³⁻ is 3 : 2.
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arrange the following from lowest to highest entropy: , , , . assume 1 mole of each at the same conditions.
Entropy, from lowest to highest entropy will be CuO (s) < H₂O (l) < H₂O₂ (l) < H₂O (g) The highest entropy is in gases. This is due to the wide variety of microstates in which gases can reside.
Do more moles result in more entropy?Higher entropy is a result of more moles on the product side. When a reaction contains numerous phases, the generation of a gas often leads to a far greater increase in entropy than any increase in the number of moles of a liquid or solid.
How low is the entropy?The physical state with the lowest entropy is the solid state. Because entropy is a measure of unpredictability, this is the case. Molecules cannot move as easily in the solid state as they can in the liquid and gaseous phases.
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question:
Arrange the following from lowest to highest entropy: H,0(), H,O2(0 H20(g), CuO(s). Assume 1 mole of each at the same conditions. from lowest to highest entropy Drag and drop your selection from the following list to complete the answer: H20(e) H20(g) CuO(s) H202(e)
When glycolysis breaks down sugar, those carbon atoms become part of what due to the citric acid cycle?.
In order to produce the new, 2-carbon acetyl CoA molecule, one carbon is taken out of the three-carbon pyruvate molecule produced during glycolysis.
What makes the citric acid cycle cyclic as opposed to linear?Compounds containing three or more carbon atoms are simpler to extract electrons from and convert to CO2 than two-carbon compounds like acetyl CoA.
What is the process of glycolysis?Glycolysis is the process by which glucose is broken down to produce energy. It produces water, ATP, NADH, and two pyruvate molecules.
What is the Kreb cycle's process?The citric acid cycle is a series of enzyme-catalyzed reactions that take place in the mitochondrial matrix and convert acetyl-CoA to carbon dioxide and coenzymes to ATP chain of electron transport.
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If a sample of air in a closed container was heated, would the percentage of oxygen in the air increase, decrease, or remain unchanged?.
The percentage of the oxygen in the air will remain unchanged.
The ideal gas law states that the temperature is directly proportional to pressure and volume. Since the gas is enclosed in the container, the volume will be fixed, so an increase in temperature leads to an increase in pressure.
The atomic mass and the number of molecules are fixed properties of the gas sample and cannot change with the heat. The density depends on the mass and the volume. The mass is also fixed property of a gas sample and the volume is being held constant, since we are dealing with a closed container. Therefore, the density must also remain constant. Because the number of molecules and the volume are constant, the average space between the molecules must remain constant.
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Heat is a measure of _____________ _____________.
Responses
A kinetic energy
B potential energy
C thermal energy
Question 3
Temperature is proportional to the _______________ kinetic energy.
Responses
A total
B average
C absolute
The answers include the following:
Heat is a measure of thermal energy which is denoted as option C.Temperature is proportional to the average kinetic energy and is denoted as option B.What is Temperature?This is referred to as the degree of hotness or coldness of a substance and it is the direct measurement of thermal energy. Its S.I unit is referred to as Kelvin and it is measured using the instrument known as thermometer which uses various techniques to obtain accurate results.
It is also proportional to the average kinetic energy of a substance thereby making it the correct choice.
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What is the energy of an electron?.
Before knowing, what is energy of electron, we should know how is energy added to electron if it goes to higher levels.
Atom jumps from a ground state to any excited state by taking the energy from its surroundings and this process is called absorption.
Electron absorbs the energy and jumps to the higher energy level.
Whereas in the reverse process, emission happens i.e. the electron returns to the ground state by releasing the extra energy which was absorbed while excitation.
Electron present in the first energy level, it must have exactly -13.6 eV of energy.
The formula to find out the energy of electron at nth orbit is mentioned in the figure.
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write a net ionic equation showing how the buffer prevented a large change in ph even after addition of a strong acid h3o
A buffer is a substance that can survive pH fluctuations caused by the addition of acidic or basic substances. It might balance off minor additions of acid or base, keeping the pH of the solution largely constant.
What is buffer solution?This is crucial for procedures and/or reactions that demand intricate and stable pH ranges. The amount of acid or base in buffer solutions can be determined by their pH range.
A weak conjugate acid-base pair, which can be either an or b, must make up a buffer. a conjugate base of a weak acid, or b. a conjugate acid of a weak base. The following, for instance, could serve as buffers when mixed together in a solution:
Sodium acetate is a salt that contains the acetate anion, the conjugate base of acetic acid, a weak organic acid.Pyridine (weak base) and a salt, such as pyridinium chloride, that contains its conjugate acid.Ammonia (weak base) and a salt containing the ammonium cation, which is its conjugate acid, are examples of this.To know more about buffer solution, visit:
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Explain the difference between the mass number and the atomic number of a nuclide.
The atomic number is the total number of protons of an atom, while the mass number is the total number of its protons and neutrons.
Atomic Number and Mass Number
An atom has properties and masses that are unique to each other. With the discovery of the particles that make up the atom known as atomic number (Z) and mass number (A).
ᵃz X
A = mass number
Z = atomic number
X = element symbol
The atomic number (Z) indicates the number of protons (positive charge) or the number of electrons in the atom. This atomic number is a characteristic of an element. Because the atom is neutral, the number of protons equals the number of electrons, so the atomic number also indicates the number of electrons.
The mass number is usually given the symbol A. This mass number is used to determine the number of nucleons in an atom of an element. The nucleon itself is a particle that makes up the atomic nucleus consisting of protons and neutrons.
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How many o2 molecules are required for two glucose molecules to undergo cellular respiration.
The number of oxygen molecules required for two glucose molecules to undergo cellular respiration is 12.
What is cellular respiration and how 12 molecules of oxygen is required for two glucose molecules to undergo cellular respiration?Cellular respiration is the respiration practice by the cells and is a exothermic chemical reaction.Here the question is asked for how many oxygen molecules are required for the glucose molecules to undergo cellular respiration.The complete equation for respiration is : C6H12O6 +6O2 = 6CO2 + 6H2O, for every one molecule of glucose is required 6 oxygen molecules.So for two molecules of glucose would be required 12 molecules of oxygen for the complete synthesis.Cellular respiration basically takes place in mitochondria which have absorbed oxygen and then it reacts with carbohydrates.To know more about glucose visit:
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a compound with the molar mass of approximately 142 g/mol has the composition 50.7% c, 9.9% h, and 39.4% n. what is its molecular formula?
The molecular formula for the provided composition of different elements is C₆H₁₄N₄.
Every time a problem provides you with a compound's molar mass, you can use a little trick to help you determine the compound's molecular mass faster.
More specifically, instead of determining the empirical formula first, then using the molar mass to get the molecular formula, we can skip the empirical formula altogether.
As you know, a compound's molar mass tells we what the mass of one mole of that substance is. In this case, one mole of our compound has a mass of 142.00 g . This means that if we pick a sample of 142.00 g of this compound, w can use its percent composition to get the exact number of moles of each element you get per mole of compound.
So, we know that this compound's percent composition is as follows:
carbon ---> 50.7%
Hydogen ---> 9.9%
Nitrogen ---.> 39.4%
This means that it contains
142 g of compound × 50.7 g of carbon / 100 g of compound = 71.99 g of Carbon
142 g of compound × 9.9 g of hydrogen/ 100 g of compound = 14.05 g of hydrogen
142 g of compound × 39.4 g of nitrogen/ 100 g of compound = 55.94 g of nitrogen
Now all we have to use the molar masses of
hese three elements to determine how many moles of each we get in one mole of our compound.
For carbon (C) : 71.99 g × 1 mole of C / 12.01 g
= 5.99 ~ 6
For Hydrogen (H) : 14.05 g × 1 mole of H / 1.007g
= 13.95 ~ 14
For Nitrogen (N) : 55.94 g × 1 mole of N / 14.006 g
= 3.99 ~ 4
therefore, molecular formula of compound will be C₆H ₁₄N₄ .
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Why do scientists think the Earth's outer core is liquid?
Core samples have liquid sections.
P waves will not pass through the core.
S waves will not pass through the core.
Meteorite cores have the same composition.
Because S waves do not pass through core, that's why scientists think the Earth's outer core is liquid.
Earth's interior is separated into a number of strata. The thickest layer underneath the crust, which makes up the surface, is the mantle. The core comes next. The inner core and the outer core are the two distinct portions of the core. The crust, mantle, outer core, and inner core of the Earth are all distinct layers.
The Earth's inner core is its deepest layer. It is solid and separate from the liquid outer core. The solid spheroid that makes up the Earth's inner core is composed primarily of iron and nickel but also contains other metals. In the inner core are siderophiles, or substances that dissolve in iron. These substances include platinum, cobalt, and gold.
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I need help answering this extra credit assignment but I could not answer the question could you please help.
Answer:
it would take longer to boil on top of a mountain because the water is not as hat
Answer:
hm provably and a couple of duty 2 and a couple
Explanation:
and one of the most important and most likely one of the rings was a little bit more of the first pack gives 99 of
What are the electron and molecular geometries, respectively, for hydrogen sulfide, h2s?.
Since there are four groups encircling the sulfur atom, the electron geometry is tetrahedral ( 2 lone pairs and 2 hydrogens)
What are the hydrogen sulfide, or H2S, electron and molecular geometries, respectively?Tetrahedral electron geometry exists. The shape of molecules is warped.
Due to the lone pair repulsion of the S-H bonds, the molecular geometry of hydrogen sulfide I discovered to be bent (which I had not came across in uniform for some reason), and the angle will be significantly less than 109.5 degrees, about 92 degrees.
Why is the molecular geometry of H2S not linear?It would bend due to the two bonds and two unshared pairs in the center atoms. The atom would only need to be in two bonding areas to be considered linear.
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Question 24 (1 point)
What is an isotope? (Select all that are correct)
A) Atoms of different elements with different mass numbers
B) Atoms of the same element with different mass numbers
C) Atoms of the same element with different numbers of electrons
D) Atoms of the same element with different numbers of protons
E) Atoms of the same element with different numbers of neutrons
F) Atoms of the same element with different charges
G) Atoms of different elements with the same charge
Which best describes the role of the water cycle?.
The water cycle explains how water vapor from the earth's surface rises into to the stratosphere, cools as well as condenses to form rain or snow behind clouds, and then falls back to the earth's surface as precipitation.
What is the definition of water?Water is a material that exists throughout gaseous, liquid, various solid phases and is made up of something like the chemical elements both oxygen and hydrogen. It is a colorless, odorless fluid at room temperature with the crucial property of dissolving several other compounds.
Can people create water?This is theoretically feasible, but the procedure would also be quite risky. Atoms of oxygen and hydrogen are necessary to produce water. You're still left without merely individual oxygen and hydrogen molecules after mixing them together.
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What tests could be used to determine if cyclohexanol is present in your product? give at least two tests with some detail of the expected result for the presence of cyclohexanol.
Tests for the presence of cyclohexanol.
Lucas testBromine water test.Explain lucas and bromine water test for cyclohexanol.The Lucas test is a chemical reactant test for determining the presence and degree of alcoholism in solution. Like most substances, cyclohexanol has many chemical properties, one of which is the presence of alcohol groups.
The presence of this chemical group allows the detection of cyclohexanol using the Lucas test. The Lucas test causes a reaction in the presence of alcohol, converting the alcohol to chloroalkanes, which tend to be poorly soluble in aqueous solutions. Given this, a positive result would appear to be that the solution is separating into cloudy areas containing chloroalkanes on top of a much clearer layer.
A bromine water test is performed to identify molecular unsaturation. Since cyclohexanol is a saturated molecule, electrophilic addition of bromine does not occur. Cyclohexanol has no π-unsaturation, so it is not nucleophilic. It does not react with bromine unless energy is supplied in the form of light or heat. So no red brown color will be observed during the reaction.
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What is oxidizing agent explain with example?.
The oxidizing agent, often referred as an electron acceptor, is typically at one of its higher oxidation states since it will receive electrons or just be reduced.
What is the purpose of chemical agents?Equipment that is vulnerable to heat is sterilized using chemical agents. Long pipettes and glasses can be sterilized using an appropriate process using chemical solutions. Throughout the absence organic life, steam chemical chemical agents are quite often utilized at pilot scale.
What are agents, both chemical and physical?High or low temperatures, dehydration, osmotic stress, radiation, and filtration are examples of physical agents. Cleaning products, antiseptics, antibacterial, and chemotherapeutic antibacterial compounds are examples of chemical agents used for control.
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What describes a reduction reaction?.
The reduction reaction is the type of reaction which is defined under a redox reaction.
Such a type of reaction involves reactions of two types:
Oxidation reaction
Reduction reaction
This is the redox reaction.
The reduction and the oxidation reaction separately are called the half reactions.
Reduction reaction is when an element is the chemical reaction is getting reduced.
This happens in many different ways. Such as reduction in the number of atoms, or when the element gains electrons and the oxidation state is reduced.
It also takes place when the oxygen is removed.
Reduction reaction occurs when a reactant gains electrons in the reaction.
Therefore the reduction reaction is described by the reduction of the oxidation state and the gains of electrons.
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Name all functional groups in this structure. (Points)
The name of all functional groups in the molecule is carbonyl, alkyne group, thiol, and an amine group.
The given molecule contains various functional groups.The molecule has a C=O group which is a ketone group, a triple bond group known as an alkyne group.There is also the presence of a double bond which is known as sulfur group.There is SH group which is the thiol group.Also, there is the NH2 group which is the amine group.A functional group is an atom or group of atoms contained within a molecule.The functional group are of various types and has similar chemical properties.To learn more about functional group visit:
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a buffer solution contains 0.378 m c6h5nh3cl and 0.450 m c6h5nh2 (aniline). determine the ph change when 0.098 mol hi is added to 1.00 l of the buffer.
The pH change when 0.098 mole HI is added to 1.00L of the buffer containing 0.378 mole C6H5NH3Cl and 0.450 mole C6H5NH2 is 0.207.
What is buffer?
Buffer is a solution which resists pH change when small amounts of acids or bases are added to it. This is due to the presence of weak acids and their conjugate bases or weak bases are their conjugate acids in the buffer solution. Because of this addition of small quantities of acids or bases will not alter the pH due to neutralization upon addition.
The pH change in the buffer solution after adding 1 mole of HI is,
pH = pKa + log [C6H5NH2] / [C6H5NH3+] = 4.6 + log [ 0.450M] / [0.378M]
pH1 = 4.675
When 0.098 mole HI is added to 1L of the buffer,
[C6H5NH2] = 0.450 - 0.098 = 0.352
[C6H5NH3+] = 0.378 + 0.098 = 0.476
pH = 4.6 + log [0.352 / 0.476]
pH2 = 4.468
pH = |pH2 - pH1| = |4.468 - 4.675| = 0.207
Therefore, the pH change when 0.098 mole HI is added to 1.00L of the buffer containing 0.378 mole C6H5NH3Cl and 0.450 mole C6H5NH2 is 0.207. We can observe that the change in pH is very small upon addition of HI.
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phosphine (ph3), an extremely poisonous and highly reactive gas, will react with oxygen to form tetraphosphorus decaoxide (p4o10) and water. ph3(g) o2(g) --> p4o10(s) h2o(g) [unbalanced] calculate the mass of p4o10(s) formed when 225 g of ph3 reacts with excess oxygen.
P4O10 mass is equal to 469.67 470 grams. Probability of occurring decaoxide and water are produced when the highly reactive and deadly gas phosphine reacts with oxygen.
Describe phosphine.At room temperature, phosphophine (PH3) is a colorless, explosive gas with a fishy or garlicky odor. Phosphine exposure may result in symptoms such as nausea, vomiting, diarrhea, thirst, discomfort in the muscles, breathing difficulties, and pulmonary fluid in the lungs.
Where can one find phosphine?One phosphorus atom and three hydrogen atoms make up the chemical complex phosphine, which has been found on Earth, Jupiter, and Saturn. It's fairly common in the atmospheres of the gas giants, both are hydrogen-rich.
Briefing:PH3 has a molar mass of 34 g/mol.
PH3 moles equal 225 g/(34 g/mol)
moles PH3 = 6.62 mol
The balanced equation is:
4PH3(g) + 8O2(g) → P4O10(g) + 6H2O
The number of moles of P4O10 is:
moles P4O10 = 6.62 mol * (1/4)
moles P4O10 = 1.65 mol
P4O10 has a molar mass of 283.89 g/mol.
P4O10 mass equals 1.65 mol times 283.89 g/mol.
mass P4O10 = 469.67 grams ~ 470 grams
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how many moles of potassium dichromate (k2cr2o7) are required to prepare a 250-ml solution of with a concentration of 2.16 m?
The moles of potassium dichromate , K₂Cr₂O₇ are required to prepare a 250 mL solution of with a concentration of 2.16 M is 0.54 mol.
given that :
molarity = 2.16 M
volume = 250 mL = 0.25 L
the molarity is given as :
molarity = number of moles / volumes in L
from this we can calculate the number of moles, we get :
number of moles of K₂Cr₂O₇ = molarity × volume
number of moles of K₂Cr₂O₇ = 2.16 × 0.25
number of moles of K₂Cr₂O₇ = 0.54 mol
Thus, The moles of potassium dichromate , K₂Cr₂O₇ are required to prepare a 250 mL solution of with a concentration of 2.16 M is 0.54 mol.
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all of the halogens . question 8 options: a) tend to form negative ions of several different charges b) exhibit metallic character c) form salts with alkali metals with the formula mx d) tend to form positive ions of several different charges e) exist under ambient conditions as diatomic gases
Halogens are the members of group 17 in the periodic table. The definition of "halogen" is "salt former." Silver bromide, potassium iodide, calcium fluoride are the compound of halogens. Option c is correct option.
Halogen compounds that are created when halogens combine with metals. They have seven electron in their valence shell and tend to form negative ion with minus one charge. Halogens are very reactive and form salts with the metals. Their ability to create salts is how they got their names.
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