Atomic mass refers to an element's average weight, whereas mass number refers to the number of nucleons.
The phrases "atomic mass" and "mass number," which are used in chemistry, have different meanings. The average weight of an element is one, while the number of nucleons in the atom's nucleus is another.Atomic weight is another name for atomic mass. The weighted average mass of an atom in an element is known as its atomic mass, and it depends on the relative abundance of its isotopes in nature.The total number of protons and neutrons in the nucleus of an atom is counted to determine the mass number.There are three naturally occurring isotopes of hydrogen, each of which has a unique mass number.1H has a proton and a mass number of 1, while 2H has a proton and a neutron. 1 proton and 2 neutrons make up 3H, which has a mass number of 3. 1H makes up 99.98% of all hydrogen. 1 It is coupled with 2H and 3H to produce a total hydrogen atomic mass of 1.00784 g/mol.The protium isotope of hydrogen, which has a single proton, is the only one in which the atomic number and mass number are the same.Learn more about Isotopes here:
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Statement
1. Angelfish has swirl patterns of black and white
2. Angelfish swimming in large schools
3. Male parrotfish 1.3 meters in length
4. Male parrotfish has large scales and scar near base of
tail fin
5. Scar on parrotfish may have been caused by a bite from
another fish
6. Brain coral over 2 meters in circumference
7. Parrotfish is afraid of brain coral because the fish will
not touch the coral
3. Sea anemone have purple tipped tentacles
9. My hand brushed up against sea anemone tentacle and
it began to hurt
10. Sea anemone tentacles have an average length of 7 cm
11. Most of the sand near the coral reef has been washed
away by the tide
12. Few divers visit this coral reef because there is no litter
near it
Inference
Quantitative Qualitative
Observation Observation
Quantitative Qualitative
Male parrotfish 1.3 meters in length
Brain coral over 2 meters in circumference
Sea anemone tentacles have an average length of 7 cm
Qualitative
Angelfish has swirl patterns of black and white
Angelfish swimming in large schools
Male parrotfish has large scales and scar near base of
tail fin
Scar on parrotfish may have been caused by a bite from
another fish
Parrotfish is afraid of brain coral because the fish will
not touch the coral
Sea anemone have purple tipped tentacles
My hand brushed up against sea anemone tentacle and
it began to hurt
Most of the sand near the coral reef has been washed
away by the tide
Few divers visit this coral reef because there is no litter
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what is the purpose of the aqueous sodium bisulfite solution that is added during the workup of the bromination reaction?
The purposes of the aqueous sodium bisulfite solution that is added during the workup of the bromination reaction remove moisture from organic layers To scavenge excess bromine in the reaction mixture To remove byproducts None of the above. The reaction between ethyl chloride and magnesium followed by addition to benzaldehyde belongs to the Grignard reaction category.
What is an aqueous sodium bisulfite solution?
This salt of bisulfite is often prepared by bubbling sulfur dioxide in a solution of sodium carbonate in water. Sodium bisulfite in touch with chlorine bleach (aqueous solution of sodium hypochlorite) will generate heat and form sodium bisulfate and sodium chloride.
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If the frequency of a red spectrum line is at 1.60 x 1014 hz, how much energy does each photon of this light have?
Each photon of this light has 1.06x10^-19 energy.
A tiny electromagnetic radiation energy bundle is known as a photon or light quantum. The idea was first put forth by Albert Einstein in his explanation of the photoelectric effect in 1905, in which he suggested that discrete energy packets might be present during the transmission of light. Heat radiation is released and absorbed in separate units, or quanta, as explained earlier by the German physicist Max Planck in the year 1900.
While all photons move at the same speed, their energies range from high-energy gamma rays and X-rays to low-energy infrared and radio waves. A concentration of photons that have been manufactured to travel collectively in order to simultaneously strike their target is what gives lasers their incredible power.
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A sample of pentanol, c5h12o, contains 0.185 mol of the compound. what is the mass of the sample, in grams?
The mass of the sample is 18.3g
What is mass?The total amount of matter in a physical body is known as mass. This property also measures inertia, or the body's resistance to acceleration (change of velocity) when a net force is applied. The mass of an object also affects the gravitational attraction it exerts on other bodies.
The kilogram is the fundamental mass unit of SI (kg). Although mass is frequently established by measuring an object's weight on a spring scale rather than a balancing scale and directly comparing it with known masses, mass and weight are not the same things in physics. Although there is less gravity on the moon than there is on Earth, an object would nonetheless have the same mass.
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how do I write both conversion factors for converting L to ML
The capacity of a liquid is measured in metric units of volume called litres and millilitres.
There are four units of measurement for liquid volume: millilitres, centilitres, litres, and kiloliters.Liter is a fundamental metric unit that measures liquid volume and is equal to one cubic decimeter.The millilitre is a more compact metric unit that measures a liquid's volume or capacity. It is equivalent to one thousandth of a litre and is used to measure smaller amounts of liquid.By dividing the given amount by 1000, we may convert the given amount to millilitres. Let's, for illustration, convert 6 litres to millilitres. So, 6 × 1000 Equals 6000 ml. 6 litres hence equal 6000 millilitres.It should be remembered that we must divide the supplied amount by 1000 in order to convert from millilitres to litres. Let's convert 7000 millilitres to litres as an example. 7000 x 1000 equals 7 litres. So, 7000 millilitres equals 7 litres.A crucial component of measurement is unit conversion, which is done using the appropriate quantity conversion factor.
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Genetic testing cannot be used to determine _____.
1.life-threatening accidents
2.potential for developing genetic diseases
3.DNA identity of a criminal
4.the identity of a genetic disease presenting symptoms
Answer:
4.the identity of a genetic disease presenting symptoms
Explanation:
Calculate the molality of a 0.677 m ethanol ( c 2 h 5 o h ) solution whose density is 0.588 g/ml
The molality of a 0.677 m ethanol ( c 2 h 5 o h ) solution whose density is 0.588 g/ml.
What is molality and molarity?
The number of solvent moles per kilogram is known as molality. Because the mass of the solute and solvent in the solution remains constant, molality is the preferred concentration transfer method.
Molarity, also referred to as molar concentration, is the quantity of a material expressed as moles per litre of solution. Solutions marked with a molar concentration have a capital M. One mole of solvent per litre is present in a 1.0 M solution.
Molar mass (w) of C2H5OH = 46g
Molarity(M) = 0.677M
Density(D) = 0.588g/mol
Molality(m) = M/D * (1000 + w*M)
= 1187.2m
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How many protons, neutrons, and electrons are there in a neutral atom of 6060 co (cobalt- 6060 )?
Cobalt-60 is composed of 27 protons, 33 neutrons, and 27 electrons.
Atom is neutral why?Atom which is heavy have more neutrons than protons, but the number of electrons in an atom is always equal to the number of protons in an atom. So an atom is electrically neutral.
Why is the charge on electron is negative?Electrons are negative as they behave in an electric field. In an electric field, an electron will move from the negative pole to the positive pole , by convention it becomes a negative charge.
Are electrons neutral?Electrons are atomic particle with a negative charge. Protons are atomic particle with a positive charge. Protons are bind together in an atom's nucleus because of strong nu-cleric force.Neutrons are the atomic particles which are neutrally charged.
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you have a container filled with 31 moles of neutral lithium. how much negative electric charge is contained in the electrons of all the lithium atoms in the container?
The electrons of every lithium atoms in the container have a combined negative electric charge of 8.96 × 10⁶ C
What is Electric Charges?Given the physical characteristic of electric charge, charged matter encounters a force whenever exposed to an electromagnetic field.It's normal for electrical charges to be positive or negative (commonly carried by protons and electrons respectively). Two charges that are in tension with each other repel another.When something is described as "neutral," it has no net charge. Classical electrodynamics refers to the earlier theory of how charged particles interact, and it is still valid for problems that do not necessitate accounting for quantum events .The net charge of an isolated system, which is the total of the positive and negative charges, cannot change since electric charge is a conserved property.We have 3 moles of electrons (e⁻) in 1 mol of Li, so the quantity of negative electric charge is:
hence
negative electric charges = 3 × 31 × 6.022 × 10²³ × 1.60 × 10⁻¹⁹
negative electric charges = 8.96 × 10⁶ C
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The density of aluminum is 2.7 g/cm3. what is the density in kilograms per cubic meter?
The density of aluminum 2.7 g/cm3 in kilograms per cubic meter is 2700 [tex]kg/m^{3}[/tex] .
A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol, however Latin letter D may also be used. The formula for density is mass divided by volume:
ρ = M/V
where m is the mass and V is the volume.
The kilogramme is equal to one gramme divided by one thousand.
So, (2.7/1)×(1000000/1000)
= 2700 [tex]kg/m^{3}[/tex]
Therefore, the density of aluminum 2.7 g/cm3 in kilograms per cubic meter is 2700 [tex]kg/m^{3}[/tex] .
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Catalyzes the first step in preparing galactose for glycolysis.
a. galactose 1-phosphate
b. galactokinase
c. galactase
d. glucokinase
e. none of these
The correct answer is d) none of these. Hexokinase is catalyzed to produce glycolysis.
Glycolysis is the process by which glucose is broken down to produce energy. It produces water, NADH, ATP, and two pyruvate molecules. It affects both anaerobic and aerobic organisms (cell doesn't require oxygen for the process).As the initial step in getting galactose ready for glycolysis, galactokinase catalyses the conversion of galactose into galactose-1-phosphate.When glucose-1-phosphate and galactose-1-phosphate from UDP-glucose switch places, UDP-galactose is produced.When an epimerase converts UDPgalactose back into UDP-glucose, the cycle is over. On each cycle turn, one glucose-1-phosphate is released and one galactose-1-phosphate is ingested.When galactose conversion enzymes are inadequate, galactose builds up. When there is too much galactose present, the sugar alcohol galactitol is formed.Learn more about Cytoplasm here:
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rank the following in order to show the precipitation of halite from water. place the first event at the top and last event at the bottom.
The order to show the precipitation of halite from water are given below.
What is precipitation ?
Precipitation is the process of changing a dissolved substance from a super-saturated solution to an insoluble solid in an aqueous solution. Precipitate refers to the produced solid. The chemical agent that initiates the precipitation in an inorganic chemical process is referred to as the precipitant.
Step 1: Seawater starts to evaporate.
Step 2: Na cations and Cl anions concentrate as water molecules leave the liquid state and are left behind.
Step 3: Cl anions and Na cations move toward one another and start to bind.
Step 4: The resulting NaCl pairs join and start to form a crystal of halite, an ordered structure.
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Question:
Rank the following in order to show the precipitation of halite from water. Place the first event at the top and the last event at the bottom.
Silicon has an atomic number of 14 and a mass number of 28. how many neutrons are found in silicon?
Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster.
How many neutrons are found in silicon?
The mass number is defined as the sum of total numbers of protons and also the numbers of neutrons which is present in the nucleus of an atom is called the mass number. So as we know that the number of proton present in silicon is 14, so by subtracting the number of neutrons from the mass number of silicon, we get 14 which shows the numbers of neutrons in the nucleus of the silicon. Silicon is an element which is denoted or represented with the symbol Si and atomic number 14. It hard in structure, with a blue-grey metallic luster.
Silicon has 14 protons and 14 neutrons. Its atomic number is 14 and its atomic mass is 28.
So we can conclude that there are 14 number of neutrons present in the nucleus of the silicon atom.
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you use 25% ethyl acetate (an ester) in hexane to run a tlc and obtain a single round spot with an rf of 0.9 for the main compound. what would you do?conclude that the sample is pure.assume that tlc will be useless and find a different way to see if the sample if pure.try a completely different set of solvents, as ethyl acetate and hexanes will never work.try 10% ethyl acetate to see the results.try 35% ethyl acetate to see the results.
Try 35% ethyl acetate to see the substance present in it is more polar ,which on increasing the concentration of ethyl acetate to give a second spot.
what is ethyl acetate? is it safe for humans?The acetate ester produced when acetic acid and ethanol react is termed as ethyl acetate. It functions as an EC 3.4.19.3 (pyro glutamyl-peptidase I) regulator, a metabolite, and a Saccharomyces cerevisiae metabolite in addition to being a polar aprotic solvent. It is a volatile organic chemical, an ethyl ester, and an acetate ester.
When inhaled or absorbed via the skin, ethyl acetate can have an impact on you.Skin, eyes, noses, and throats can get irritated by ethyl acetate.Excessive exposure might make you feel lightheaded, woozy, and faint.Constant contact might lead to skin dryness and cracking.to know more about ethyl acetate visit:
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The complete question is :
You use 25% ethyl acetate (an ester) in hexane to run a tlc and obtain a single round spot with an Rf of 0.9 for the main compound. What would you do?
Try a completely different set of solvents, as ethyl acetate and hexanes will never work. Try 10% ethyl acetate to see the results. Try 35% ethyl acetate to see the results. Assume that tic will be useless and find a different way to see if the sample if pure.Conclude that the sample is pure.the reaction of 1-bromobutane with sodium hydroxide affords the substitution product 1-butanol. what would happen to the rate of the reaction if the concentration of both 1-bromobutane and sodium hydroxide were doubled?
The rate increases by a factor of 4. IF the rate of the reaction concentration of both 1-bromo butane and sodium hydroxide were doubled
What is meant by rate of reaction?
The rate of reaction refers to the speed at which the products are formed from the reactants in a chemical reaction.The reaction rate or rate of reaction is that the speed at which a chemical reaction takes place, defined as proportional to the rise in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically
Why is rate of reaction important?
The rate of a reaction is a powerful diagnostic tool. By checking out how fast products are made and what causes reactions to slow down we can develop methods to improve production. This information is important for the large scale manufacture of many chemicals including fertilizers, drugs and household cleaning items.
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Which actions are part of the scientific process? Select all that apply.
A] Experiments
B] hypotheses
C] Observations
D] Conclution
Please help i give brainly!!!!!
The actions that are part of the scientific process are as follows:
ExperimentsHypothesesObservationsConclusionWhat is the scientific method?The scientific method is a method of discovering knowledge about the natural world based in making falsifiable predictions called hypotheses, testing them empirically, and developing theories that match known data from repeatable physical experimentation.
The scientific method is made up of the following processes:
Making an observation or asking questionsConstructing an hypothesisTesting the hypothesis via experimentationAnalyzing the dataMaking a conclusionTherefore, the actions that are part of the scientific process are as follows:
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Drag each tile to the correct location.
What types of mixtures are these?
Homogenous mixture - a cup of tea and sugar, food coloring dissolved in water.
Heterogenous mixture - a bucket full of sand and gravel, peanut and almond mixed together in a bowl.
What are mixtures?Mixtures are substances that are made up of 2 or more substances mixed together.
Mixtures can be homogenous if the component substances are uniformly distributed. If the components are skewed to a particular side or are not uniformly distributed, such a mixture is said to be heterogeneous.
A homogenous mixture is attained when a solute completely dissolves in a solvent. If the solute is partially or totally insoluble, a heterogeneous mixture results.
In the same vein, a solid-solid mixture cannot be homogenous.
Thus:
Homogenous mixture - a cup of tea and sugar, food coloring dissolved in water.Heterogenous mixture - a bucket full of sand and gravel, peanut and almond mixed together in a bowl.More on mixtures can be found here: https://brainly.com/question/24898889
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What is the ph of a 205 ml sample of 2.668 m benzoic acid (c6h5cooh) (ka = 6.4 x 10-5)?
The pH of a 205 ml sample is 1.58.
Balanced chemical eqation for benzoic acid release proton in water:
C₆H₅COOH(aq) ⇄ C₆H₅COO⁻(aq) + H⁺(aq)
V(C₆H₅COOH) = 205 mL; volume of benzoic acid
c(C₆H₅COOH) = 2.668 M; concentration of benzoic acid
Ka = 6.4 x 10-5; acid constant of benzoic acid
c(C₆H₅COO⁻) = c(H⁺) = x; unknown concentration
Ka = (c(C₆H₅COO⁻) x c(H⁺)) / c(C₆H₅COOH)
6.4 x 10-5 = x² / 2.668 M - x
x² + (6.4 x 10-5)x - 1.7 x 10⁻⁴ = 0
Solve for x, using quadratic formula:
x = c(H⁺) = 0.026 M
pH = -logc(H⁺)
pH = -log0.026
pH = 1.58
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A computer simulation attached to a controls that include a steering wheel,
brakes, and gas pedal can be used to help people who are learning to drive.
The controls sense the forces applied, and the computer simulation shows
how a car would respond. What is one benefit of this model.
A. Drivers can learn how to obey local driving regulations.
B. When the steering wheel is turned in different directions, it models
how the car turns.
OC. Other drivers on the road are not shown.
D. Weather conditions, such as rain and snow, are not included in the
model.
Driving instruction can be assisted by using computer simulations of the steering wheel, brakes, and gas pedal. The car's response is predicted by computer models after the controls detect the applied forces. This model has the benefit of simulating how the car turns when the steering wheel is rotated in various directions.
You can investigate "what if" scenarios and questions through simulation without having to experiment with the system itself. You can use it to locate areas where the flow of materials, information, and products is stumbling. It aids in your understanding of the factors that affect system performance the most.When circumstances cannot be imposed safely or easily in real life, computer simulations are used to study the dynamic behavior of objects or systems. For instance, a mathematical model that takes into account factors like heat, velocity, and radioactive emissions can be used to explain a nuclear bomb.Before actually driving on the roads, the learner becomes accustomed to driving in EDI's simulator training facility. The sophisticated technology in the simulators gives users side views so they can see potential traffic hazards. Real-time vehicle dynamic simulation is the primary technological component of a driving simulator. Sensors and electronics record the driver's interactions with the vehicle through the steering wheel, gas, and brake pedals. The signals are transformed into inputs for the dynamic model of the car underneath.To learn more about computer simulations
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Your tank of alkali fish needs a ph of 8, and the ph is 6 at present. what should you do to the h concentration?
To obtain pH 8, multiply the [H+] concentration at pH 6 by 0.01
How to determine the hydrogen ion concentration, [H+] at pH 8From the question given above, the following data were obtained:
pH = 8Hydrogen ion concentration [H+] =?pH = –Log [H+]
8 = –Log [H+]
Multiply through by –1
–8 = Log [H+]
Take the anti-log of –8
[H+] = anti-log (–8)
[H+] = 1×10⁻⁸ M
How to determine the hydrogen ion concentration, [H+] at pH 6pH = 8Hydrogen ion concentration [H+] =?pH = –Log [H+]
6 = –Log [H+]
Multiply through by –1
–6 = Log [H+]
Take the anti-log of –6
[H+] = anti-log (–6)
[H+] = 1×10⁻⁶ M
Comparison of [H+] at pH 6 and pH 8[H+] at pH 6 = 1×10⁻⁶ M[H+] at pH 8 = 1×10⁻⁸ M[H+] at pH 8 / [H+] at pH 6 = 1×10⁻⁸ / 1×10⁻⁶
[H+] at pH 8 / [H+] at pH 6 = 0.01
Cross multiply
[H+] at pH 8 = 0.01 × [H+] at pH 6
Thus, to obtain pH 8, multiply the [H+] at pH 6 by 0.01
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Which phrase describes a chemical change?
O an exploding firecracker
O a freezing ice cube
O wood breaking into splinters
O a wire conducting electricity
describe how infrared spectroscopy could be used to determine when the addition of br2 to 1-pentene had gone to completion.
C-H sp2 and C=C double bond stretching bonds will disappear.
what is Infrared spectroscopy?The examination of infrared light's interactions with molecules is known as infrared spectroscopy. It's frequently utilized to find numerous bonds and functional groups in both organic and inorganic compounds.
Each compound has a distinctive light absorption area that acts as its unique fingerprint. It can be used to identify functional groups in a molecule because the majority of them exhibit absorption bands in this range (400-1400cm-1).
This method can be used to evaluate whether the addition reaction of bromine (Br2) with 1-pentene has completed because the spectral bands for the C-H sp2 and C=C bonds will vanish.
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select all of the following that apply to lipids. multiple select question. consist mostly of polar chemical groups contain mostly carbon and hydrogen do not dissolve in water high oxygen content
Select all of the following that apply to lipids. contain mostly carbon and hydrogen ,do not dissolve in water
What is lipids in simple terms?A lipid is any of varied organic compounds that are insoluble in water. They include fats, waxes, oils, hormones, and certain components of membranes and performance as energy-storage molecules and chemical messengers.
What is lipids in human body?Lipids are fatty, wax like molecules found within the human body and other organisms. They serve several different roles within the body, including fuelling it, storing energy for the longer term , sending signals through the body and being a constituent of cell membranes, which hold cells together.
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Precipitate-forming reactions would be most appropriate for identifying the presence of?
Precipitate-forming reactions would be most appropriate for identifying the presence of whether an element is present in the solution.
What is precipitate forming reaction?In a precipitation reaction, dissolved chemicals will get combined to form one or more solid products. These kinds of reactions, which are also known as double displacement, double replacement, or metathesis reactions which are frequently taken place through the aqueous solutions and involved in the exchange of ions between ionic compounds.
Through the precipitation reactions, the presence of element will be confirmed and analyzed. The presence of lead in water sources could be checked by adding the chemical and looking for the appearance of a precipitation whether it should be at instant , and the chemical combines with lead to generate a precipitate.
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Trinitroglycerin, C3H5N3O9 (usually referred to simply as nitroglycerin), has been widely used as an explosive. Alfred Nobel used
it to make dynamite in 1866. Rather surprisingly, it also is used as a medication, to relieve angina (chest pains resulting from
partially blocked arteries to the heart) by dilating the blood vessels. At 1 atm pressure and 25 °C, the enthalpy of decomposition
of trinitroglycerin to form nitrogen gas, carbon dioxide gas, liquid water, and oxygen gas is -1541.4 kJ/mol.
(a) Write a balanced chemical equation for the decomposition of trinitroglycerin.
(b) Calculate the standard heat of formation of trinitroglycerin.
(c) A standard dose of trinitroglycerin for relief of angina is 0.60 mg. If the sample is eventually oxidized in the body (not explosively,
though!) to nitrogen gas, carbon dioxide gas, and liquid water, what number of calories is released?
(d) One common form of trinitroglycerin melts at about 3 °C. From this information and the formula for the substance, would you
expect it to be a molecular or ionic compound? Explain.
(e) Describe the various conversions of forms of energy when trinitroglycerin is used as an explosive to break rockfaces in highway
construction.
The compound Trinitroglycerin is a molecular compound
What is Trinitroglycerin?The compound Trinitroglycerin is basically used as an explosive. It could decompose following the equation;
a) [tex]4C_{3} H_{5} N_{3} O_{9} (l)--- > 12CO_{2} (g) + 10H_{2} O(g) + 6N_{2} (g) + O_{2} (g)[/tex]
b) We can see that the decomposition of the compound Trinitroglycerin produces -1541.4 kJ/mol of energy hence 1541.4 kJ/mol is the enthalpy of formation of the compound.
c) Number of moles in 0.6 mg of the compound = 0.6 * 10^-3 g/227 g/mol
= 2.6 * 10^-6 moles
If 4 mole of the compound produces 1541.4 kJ of heat
2.6 * 10^-6 moles of the compound produces 2.6 * 10^-6 moles * 1541.4 kJ/4 mole
= 1 * 10^-3 kJ or 1 J
If 1 Cal = 4.184 J
x = 1 J
x = 0.24 cal
d) The compound is a molecular compound
e) When trinitroglycerin is used as an explosive to break rockfaces in highway construction, chemical energy is converted to heat, light, sound and mechanical energy.
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Write the formulas of the following compounds:
a. acetic acid
b. silver carbonate
c. copper(ii) sulfate
d. dinitrogen monoxide
e. xenon trisulfide
a. acetic acid = CH3COOH
b. silver carbonate = Ag2CO3
c. copper(ii) sulfate = CuSO4
d. dinitrogen monoxide = N2O
e. xenon trisulfide = XeS3
What is chemical formula?
An element's chemical symbol and the proportionate number of atoms it contains are used to identify each constituent element in a chemical formula. These proportions are determined by empirical formulae that begin with a key element and then assign atom counts to the other parts of the compound in relation to the key ingredient.
A chemical formula is a representation of a compound's constituent elements and their relative proportions.
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what were the shortcomings of mendeleev's periodic table?
what includes the carbon dioxide and carbon monoxide in the atmosphere, produced by business processes and systems? multiple choice ewaste energy consumption sustainable mis carbon emissions
The emission of carbon dioxide and carbon monoxide constitute carbon emissions.
What are carbon emissions?
The term carbon emissions has to do with the ways in which carbon could be introduced into the environment. We know that carbon is a very important component of pollution as it is contained in fossil fuels which are often burnt to release energy to drive civilization.
Hence the term carbon emissions include the carbon dioxide and carbon monoxide in the atmosphere, produced by business processes and systems.
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What is the buffer range for the na2hpo4/na3po4 buffer if its ph = 11.9? ( (ka1= 7.5 x 10-3, ka2= 6.2 x 10-8, ka3= 4.8 x 10-13)a.11.3 to 13.3b.10.9 to 12.9c.9.9 to 11.9d.6.2 to 8.2
Buffer range of Na₂HPO₄/Na₃PO₄ is 10.9 to 12.9
Since NaH₂PO₄ and Na₂HPO₄ are acid salts, they have the ability to function as both acids and salts. They will create a buffer when one acts as an acid and the other as a salt.A buffer is a substance that can withstand a pH change when acidic or basic substances are added. Small additions of acid or base can be neutralised by it, keeping the pH of the solution largely constant.The Henderson-Hasselbalch equation establishes a connection between an acid's pKa and pH. When the concentration of the acid and its conjugate base, or the base and the corresponding conjugate acid, are known, the pH of a buffer solution can be determined with the use of this equation.using Henderson hasselbach equation:
pH = pKa + log₁₀ ([A⁻]/ [HA])
By this equation we can find out the buffer range
Given,
pH of given buffer is 11.9
Ka₁= 7.5 x 10⁻³
Ka₂= 6.2x 10⁻⁸
Ka₃= 4.8 x 10⁻¹³
so by Henderson hasselbach equation buffer range is 10.9 to 12.9
Therefore, correct option is (b)
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The compound mnco3 is an ionic compound. what are the ions of which it is composed?
Manganese(II) ions are arranged in MnCO3 in an octahedral coordination geometry, giving it a structure similar to that of calcite.
What is octahedral coordination?The shape of compounds with six atoms or groups of atoms or ligands symmetrically grouped around a central atom, defining the vertices of an octahedron, is described by octahedral molecular geometry, also known as square bipyramidal, in chemistry. The prefix octa refers to the octahedron, which has eight faces. Although octahedral compounds typically have an atom in their center and no links between the ligand atoms, the octahedron is one of the Platonic solids.
To the point group Oh belongs a perfect octahedron. Molybdenum hexacarbonyl Mo(CO)6 and sulfur hexafluoride SF6 are two examples of octahedral chemicals.
To learn more about octahedral coordination from the given link:
brainly.com/question/14313840
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