Explanation:
mole=mass/molar mass
molar mass of c12H17N4OS
12×12+17+14×4+16+32
=265
molar mass=265
mole=0.02/265
Which of the following statements are correct?
Magnesium chloride and magnesium sulfate are ionic compounds.
Methane and carbon dioxide are ionic compounds
An ion that gains an electron has a positive charge.
Ionic compounds have higher melting and boiling points than covalent compounds.
Full Tablet................................
The reaction rate with mass of the tablet being 1000 mg and volume of water 0.200 L is
(i) If Reaction time is 34.5 sec – 145 mg / L / sec is the reaction rate
(ii) If Reaction time is 28.9 sec – 173 mg / L / sec is the reaction rate
(iii) If Reaction time is 23.1 sec – 216 mg / L / sec is the reaction rate
Given that, Mass of tablet = 1000 mg
Volume of water = 0.200 L
We need to find the reaction rate
We know that, Reaction rate = [tex]\frac{mass of tablet / volume of water}{reaction time}[/tex]
(i) Reaction rate if reaction time is 34.5 sec = [tex]\frac{1000 / 0.200}{34.5}[/tex] = 145 mg / L / sec
(ii) Reaction rate if reaction time is 28.9 sec = [tex]\frac{1000/0.200}{28.9}[/tex] = 173 mg / L / sec
(iii) Reaction rate if reaction time is 23.1 sec = [tex]\frac{1000/0.200}{23.1}[/tex] = 216 mg / L / sec
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Vinegar or acetic acid has the formula CH3COOH. Based on its structure what kind of intermolecular forces would you expect in this compound?
Vinegar or acetic acid(CH3COOH) has intermolecular forces of hydrogen bonding, dipole-dipole interactions and dispersion force.
What are intermolecular forces?Intermolecular forces can be defined as the attractive and repulsive forces that arise between the molecules of a substance.
Intermolecular forces includes the electromagnetic forces of attraction or repulsion which act between atoms and other types of its close particles such as atoms or ions.
Vinegar or acetic acid(CH3COOH) has intermolecular forces of hydrogen bonding, dipole-dipole interactions and dispersion force.
Vinegar or acetic acid(CH3COOH) has an especially strong type of hydrogen bonding. In solid state, the molecules in the acetic acid form cyclic pairs connected by hydrogen bonds. Thus, making it to have a low volatility.
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a mixture of argon and xenon gases is maintained in a 7.66 l flask at a pressure of 2.44 atm and a temperature of 86 °c. if the gas mixture contains 17.0 grams of argon, the number of grams of xenon in the mixture is
By using the general gas equation, the mass of Xenon in the mixture is found to be 27.44g.
The ideal gas law, also known as the general gas equation, says that the product of the pressure and volume of one gram of an ideal gas is equal to the result of the universal gas constant and the absolute temperature of the gas.
PV = nRT denotes the general gas equation. In this equation, the letters P, V, n, R, T stand for the pressure of the ideal gas, the volume of the ideal gas, the total amount of the ideal gas given in moles, the universal gas constant and the temperature, respectively.
The general gas equation states that one mole of an ideal gas may occupy a volume of 22.414 liters under standard circumstances, which are a pressure of 101,325 Pa / 1atm and a temperature of 273.15 K or 0°C.
Given:
Pressure, P = 2.44atm
Temperature, T = 86+273 = 359K
Volume, V = 7.66L
To find:
Mass of Xe = ?
Formula:
PV = nRT
Calculations:
Let total no. of moles of Ar and Xe = y
n = PV/RT
n = 2.44 x 7.66 / (0.0821 x 359) = 0.634mol
No. of moles of Argon (yAr) = 17/40 = 0.425mol
y = yAr + yXe
0.634 = 0.425 + yXe
yXe = 0.634 - 0.425
yXe = 0.209mol
Mass of Xe = no. of moles x gram atomic mass
Mass of Xe = 0.209 x 131.293 = 27.44g
Result:
27.44g Xenon is present in the given Argon and Xenon mixture.
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What must a force be greater than in order to move an object?
Responses
inertia
inertia
momentum
momentum
acceleration
acceleration
gravity
Answer:
Acceleration
Explanation:
What happens in the process of beta decay?
Answer:
a neutron decays into a proton, an electron, and an antineutrino: n Æ p + e - +.
Explanation:
In beta plus decay, a proton decays into a neutron, a positron, and a neutrino: p Æ n + e+ +n. Both reactions occur because in different regions of the Chart of the Nuclides, one or the other will move the product closer to the region of stability. These particular reactions take place because conservation laws are obeyed. Electric charge conservation requires that if an electrically neutral neutron becomes a positively charged proton, an electrically negative particle (in this case, an electron) must also be produced. Similarly, conservation of lepton number requires that if a neutron (lepton number = 0) decays into a proton (lepton number = 0) and an electron (lepton number = 1), a particle with a lepton number of -1 (in this case an antineutrino) must also be produced. The leptons emitted in beta decay did not exist in the nucleus before the decay–they are created at the instant of the decay.
Which of the following is NOT a necessary characteristic of a living thing?
A) It is made up of cells.
B) It eats food to get energy.
C) It grows and develops.
D) It responds to stimuli.
It eats food to get energy is NOT a necessary characteristic of a living thing
What is a living thing ?A cell or cells make up all living things. To exist, they acquire energy and use it. A special ability to reproduce, grow, metabolise, respond to stimuli, adapt to the environment, move, and last but not least, a special ability to breathe.Things that lack the traits of life are considered non-living. According to that description, non-living things include glass, the sun, glass, water, sand, and rock. They don't exhibit any signs of life at all.Humans, animals, plants, and microorganisms are a few examples of living creatures that we come into contact with every day. Things that aren't alive don't show any signs of life. They don't evolve, move, breed, use energy, or keep their homeostasis in check. These items are constructed from non-living substances.Learn more about Living things here:
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A car was purchased in 2010 for $20,000. The car is depreciating by 15% each year. How much would the car be worth in 2020? What value do you use for T
The value of a car that was purchased in 2010 for $20,000 which is depreciating in value by 15% each year is $3937.49.
What will be the value of the car after 10 years if it depreciates by 15% every year?The value of the car will be found using the exponential decay model.
The formula of the exponential decay model is given as follows:
y = a (1 - r)ˣ
where;
y = the amount remaining
a = initial amount
r = decay rate
x = time period of decay
In the question above, a car was bought for $20000 in 2010.
The value of the car decays exponentially at a rate of 15% each year.
The time period between 2010 and 2020 is 10 years.
Considering the data given about the car:
a = $20000
r = 15% or 0.15
x = 10
Substituting the values in the decay formula:
y = 20000 (1 - 0.15)¹⁰
y = 20000 (0.85)¹⁰
y = $3937.49
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if cleaning does not throughly remove the surface water from your plastic sample, where in the energy ranges of the ir spectrum might you see a broad peak, indicating the presence of water?
The presence of water on the surface of the plastic sample will be indicated with a broad peak in the 2400 – 3200 [tex]cm^{-1}[/tex] range of Infra-red (IR) spectroscopy.
The term "infra-red (IR) spectroscopy" refers to a method for locating the functional groups that are present in a molecule. The electromagnetic spectrum's infrared area is located between the microwave and the visible spectrum. The typical Infra-red (IR) absorption range is 600-4000 [tex]cm^{-1}[/tex]. The IR spectra of substances that absorb in the IR range exhibits peaks. A molecule that is IR active is water. In the Infra-red region, it absorbs. Water is thus not used as a solvent in IR spectroscopy. Therefore, it is necessary that water existing on the surface of the samples be removed during cleaning before their IR is recorded. However, if cleaning does not get rid of the water that is on the surface, an expansive peak in the IR spectra will show up between 2500 and 3200 [tex]cm^{-1}[/tex].
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A student is investigating the percentage purity of ibuprofen in a sample of tablets. 6.00 g of a sample of impure ibuprofen tablets was crushed and dissolved in 200 cm³ of 0.200 mol dm-³ aqueous sodium hydroxide.
25.0 cm³ of this solution was withdrawn and titrated against hydrochloric acid. The unreacted NaOH in this solution required 24.40 cm³ of 0.120 mol dm of hydrochloric acid for complete neutralisation.
i) Calculate the amount of sodium hydroxide that has reacted with hydrochloric acid. (ans: 0.002928mol)
ii) Calculate the amount of sodium hydroxide unreacted in 200 cm³ solution.
(ans: 0.002928 x (200/25.0) = 0.0234mol)
I KNOW HOW TO DO PART i. PLEASE EXPLAIN HOW TO GET THE ANSWER FOR PART ii WITH THE GIVEN SOLUTION thank you
Based on the mole ratio of the reaction and the volume of the reactants used;
Amount in moles of hydroxide that has reacted with hydrochloric acid is 0.002928 molesAmount in moles of sodium hydroxide unreacted in 200 cm³ solution is 0.0234 moles.What is the amount of sodium hydroxide that reacted with hydrochloric acid?The amount of sodium hydroxide that reacted with hydrochloric acid is calculated from the mole ratio of the reaction between hydrochloric acid and sodium hydroxide.
The equation of the reaction is given as follows:
HCl (aq) + NaOH (aq) ---> NaCl + H₂O
The mole ratio of HCl and NaOH is 1 : 1
Moles of HCl in 24.40 cm³ of 0.120 mol dm of hydrochloric acid solution will be determined as follows:
Moles = molarity * volume in LitersMoles of HCl = 0.120 * 24.40 / 1000
Moles of HCl = 0.002928 moles
Thus moles of NaOH reacted = 0.002928 moles
The amount of sodium hydroxide unreacted in 200 cm³ solution is determined as follows:
Moles of sodium hydroxide unreacted in 25 cm³ solution = 0.002928 moles
Moles of sodium hydroxide unreacted in 200 cm³ solution = 0.002928 moles * 250 / 25
Moles of sodium hydroxide unreacted in 200 cm³ solution = 0.0234 moles.
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The electron configuration of an element is 1s22s22p6. Describe what most likely happens when an atom of this element comes near an atom having seven valence electrons.
A single electron from the outermost shell of this element moves to the outermost shell of an atom with seven electrons.
When forming ions elements typically gain or lose the minimum number of electrons required to make a complete octet. For example, fluorine has 7 valence electrons, so it is most likely to gain an electron and form an ion of charge At the outermost energy level he states 8 electrons must be reached for an atom to be stable. Particles smaller than an atom.
Ionization is the process by which ions are formed by gaining or losing electrons from atoms or molecules. When an atom or molecule receives an electron it becomes a negatively charged anion and when it loses an electron it becomes a positively charged cation. Energy can be lost or gained in the formation of ions.
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Which of the following should have the highest denisty?
A) A solution that is 5 mass % sugar
B) A solution that is 10 mass % sugar
C) A solution that is 20 mass % sugar.
D) A solution that is 15 mass % sugar
A solution that is 20 mass % sugar will have highest density as density is directly proportional to mass and inversely proportional to volume. Thus option C is correct.
What is density?Density is defined as the degree to which a material is packed together
It can also be defined as substance mass per unit volume.
Density can be expressed as
Density = mass / volume
Thus, a solution that is 20 mass % sugar will have highest density as density is directly proportional to mass and inversely proportional to volume. Thus option C is correct.
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show the linkages between a trisaccharide with the sequence glca–glca–glca. the trisaccharide has an α1→4 glycosidic linkage between the first and second \glca monosaccharides. the trisaccharide has a β1→4 glycosidic linkage between the second and third glca monosaccharides. show stereochemistry using wedge (upward) or dash (downward) bonds.
Trisaccharides, an oligosaccharide, are created when three monosaccharides are linked together by two glycosidic connections.
What are trisaccharide?Trisaccharides, an oligosaccharide, are created when three monosaccharides are linked together by two glycosidic connections. The constituent monosaccharides can form each glycosidic bond between any hydroxyl group, just like the disaccharides can.
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N a p h, f a d h, and h 2 o enter the electron transport chain. o 2 and 32 a t p exit the electron transport chain. which change will correct this model of the electron transport chain? switch naph and 32 atp. switch fadh and 32 atp. switch h2o and o2. switch naph and o2.
The change will correctly effect the model of the electron transport system above simply is to switch H₂O and O₂ ( Water and oxygen ).
The correct answer choice is option c.
Switching water and oxygen molecules to effect a change where NAPH, FADH, and H₂O enter the electron transport chain.It happens that oxygen react with 2 different electrons from the transport chain and 2 hydrogen in order to produce water molecules in the process.
Electron transport chain simply refers to a protein complex redox reactions which result in the production of ATP molecules. In this whole process of forming ATP, the electrons in the chain carried by the NADH, FADH2 and H+· are transferred to oxygen atom.
In conclusion, for an effective change to occur in the above electron transport system, there needs to be a switch of water and oxygen molecules
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Answer :Switch H2O and O2.
Explanation: edgenuie 2022-23
1. s orbital(s) and p orbital(s) form sp3 orbital(s).target 1 of 9target 2 of 9target 3 of 9 2. s orbital(s) and p orbital(s) form sp2 orbital(s).target 4 of 9target 5 of 9target 6 of 9 3. s orbital(s) and p orbital(s) form sp orbital(s).
A sphere surrounds the atomic nucleus called the s orbital. There are shells within the sphere where an electron is more likely to be discovered right now. 1s is the smallest sphere. Greater than the 1s orbital are the 2s and 3s orbitals.
Each p orbital has two lobes, that are located on either side of the plane of the nucleus. The three p orbitals are equal in terms of size, shape, and energy, but they differ in how the lobes are orientated. These three orbitals are referred to as 2px, 2py, and 2pz because the lobes are located along one of the x, y, or z-axis. Similar to s orbitals, p orbitals grow in size and energy as the primary quantum number rises (4p > 3p > 2p).
sp3 orbital: One of a group of hybrid orbitals that result from mathematically combining one s orbital and three p orbitals to create four new equivalent orbitals that are directed toward the corners of a regular tetrahedron.
One of the hybrid orbitals created when one s orbital and one p orbital are mathematically merged to create two new equivalent, perpendicular orbitals is the sp orbital. With the exception of being closer to the nucleus, sp orbitals resemble p orbitals in appearance.
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what is a solid with the following characteristic property:
a density of 0.56g/cm³
Solid with the following characteristics property: Density is 0.56 g/cm³ is Lithium .
Lithium , chemical symbol Li is the alkali group metal. lithium is the lightest solid element. lithium has melting point of 180.54 °C and having boiling point of 1342 °C. lithium belongs to group I(a) having valency 1. under normal condition , lithium is the least dense solid element having density 0.56 g/cm³ . lithium has several industrial uses like heat resistant glass lithium ion batteries , lithium is so light ,it can float on water.
Thus, Solid with the following characteristics property: Density is 0.56 g/cm³ is Lithium .
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An object travels at 65 mph west for 2 hours then changes direction and travels 50 mph east for three hours. Did this object accelerate?
No because it's travelling at a constant velocity in both scenarios and there's no particular direction in which the rate of change of velocity is changing.
describe, step-by-step, how will you prepare 10 ml of 0.050 m hcl from a 0.10 m solution of hci? assume that you use a 100-ml graduated cylinder (in which volumes can be read to the nearest 0.1 ml).
Taking into account the definition of dilution, you would take 5 mL of the 0.10 M solution of HCl and you have to add 5 mL of deionized water.
DilutionWhen it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution. In this way, dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeProcess in this caseIn this case, you know:
Ci= 0.10 MVi= ?Cf= 0.050 MVf= 10 mLReplacing in the definition of dilution:
0.10 M× Vi= 0.050 M× 10 mL
Solving:
Vi= (0.050 M× 10 mL)÷ 0.10 M
Vi= 5 mL
Finally, this means that you would take 5 mL of the 0.10 M solution of HCl. If you need to prepare 10 ml of 0.050 M, you have to add 5 mL of deionized water.
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How do heat waves form
Answer:
Heat waves can form when a high-pressure system moves into a region and stalls. The system can force warm air downward, acting like a cap as it keeps the cool air near the surface from rising, according to AccuWeather. What qualifies as a heat wave can vary greatly from region to region.
Name the following three structures.
The Iupac Name of given three compounds are 3,4,5-trimethylheptane, 2,2,3,3-tetramethylpentane and 2,2- dimethyl-3-ethylpentane.
For (1),
The longest straight chain have 7 carbon compound and having single bond, suffix of this compound is Heptane. Now there are three functional group of methyl there for prefix is trimethyl. Overall the name of compound is 3,4,5-trimethylheptane.
The longest straight chain have 5 carbon compound and having single bond, suffix of this compound is pentane. Now there are four functional group of methyl there for prefix is tetramethyl. Overall the name of compound is 2,2,3,3-tetramethylpentane.
The longest straight chain have 5 carbon compound and having single bond, suffix of this compound is pentane. Now there are three functional group of methyl and ethyl so they write according to alphabetic order. Overall the name of compound is 2,2- dimethyl-3-ethylpentane.
Thus, we concluded that the The Iupac Name of given three compounds are 3,4,5-trimethylheptane, 2,2,3,3-tetramethylpentane and 2,2- dimethyl-3-ethylpentane.
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What is the importance of subscripts when writing a chemical equation? (3 points)
The subscripts in a chemical equation shows the number of atoms of each element in a compound.
What is a chemical equation?A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.
Chemical equations involves molecular formulas of compounds that make up the reactant and products. The molecular formula is a notation indicating the number of atoms of each element present in a compound.
Subscript is a type of lettering form written lower than the things around it. The subscript shows the number of atoms of an element in a compound.
Examples of elements with evident subscripts are as follows:
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You need to use your separatory funnel for an extraction, but you notice that there is some residual water in it from when it was washed during the previous lab period. What should you do?.
Depending on the extraction you are performing and the way it was washed, the separatory funnel can either be dried, washed again, or just used as is.
In an ideal case, the separatory funnel was thoroughly washed and rinsed with deionized water. Because most liquid-liquid extractions include an aqueous layer, the small amount of water already present in the funnel will not have any negative impact on the results of your experiment, and the funnel can be used as it is.
If you are not sure whether the funnel was properly washed, you can quickly wash it yourself using detergent and water, rinse it thoroughly with deionized water, and then use it.
Finally, you can rinse the funnel with some ethanol (or, if possible, acetone), which will pick up water and wash away any organic impurities that might be present, and then dry it with a hair dryer. Be careful to wait for the funnel to cool after drying because many organic solvents have low boiling points and might cause a problem if poured into a hot funnel.
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What mass in grams of ammonia can be made from 340 g of H₂?
The balanced equation for ammonia formation is:
N2 + 3H2 ---> 2NH3
First we need to figure out how many moles of hydrogen, 340 grams nets us. We can do this by dividing 340 by the molar mass of diatomic hydrogen (2.016 grams/mole). This will get us 168.651 moles.
From the chemical formula, we see that it takes 3 moles of hydrogen to produce 2 moles of ammonia. So, if we multiply the moles of hydrogen by (2/3), we can find the moles of ammonia produced.
168.651 x (2/3) = 112.43 moles of ammonia
To convert this into grams, we multiply this number with the molar mass of ammonia (which is 17.031 grams/mole)
112.43 x 17.031 = 1914.8 grams of ammonia. Or if you want to account for significant figures, 1900 grams of ammonia.
Andrea's teacher wrote a note on her lab report stating that though her data was precise, it was not accurate. What could Andrea have done wrong?
Group of answer choices
Written the data down in her notebook incorrectly
Not properly calibrated her instruments
She didn't do anything wrong; experiments do not always turn out the way we expect.
She could have made several random errors.
If Andrea's teacher wrote a note on her lab report stating that though her data was precise, it was not accurate, then Andrea she didn't properly calibrate her instruments (Option b).
What are precision and accuracy?The term precision indicated that the measurement was correctly recorded in the experimental procedure, while accuracy refers to this measurement is factually correct. For example, when measuring temperature, it may be deviated from the correct temperature value due to failure of calibration in instrumentation.
Therefore, we can conclude that precision and accuracy are not identical and we can take precise measurements that are not accurate.
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There are more white blood cells than red blood cells in the blood.
True or false
Answer:
it's false the correct answer will be There are more red blood cells than white blood cells in the blood
for the gas phase decomposition of ethyl chloroformate, the rate constant has been determined at several temperatures. when in is plotted against the reciprocal of the kelvin temperature, the resulting linear plot has a slope of k and a -intercept of 24.6. the activation energy for the gas phase decomposition of ethyl chloroformate is kj/mol. submit answer
The reaction rate constant and activation energy are connected through the Arrhenius equation. By using the logarithmic form of that equation, we can calculate the activation energy of 0.2045 kJ/mol.
According to Arrhenius equation, activation energy and rate constant are connected in the following way:
[tex]k = Ae^{\frac{-E_{a} }{RT} }[/tex]
Ea is the activation energy, k is the rate constant, R is the universal gas constant (8.314 J/Kmol) and T is absolute temperature (in Kelvins). This expression can be transformed so that it is easier to determine Ea:
[tex]lnk = \frac{-Ea}{R}*\frac{1}{T}[/tex]
When lnk is plotted as a function of 1/T, the slope coefficient is equal to -Ea/R. This means that:
-24.6 K = -Ea/R ⇒ Ea = 24.6 K * R = 24.6 K * 8.314 J/Kmol = 204.5 J/mol = 0.2045 kJ/mol
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What is the measurement of the letter I when using appropriate prefix units?
A metric prefix is a unit prefix used to denote a multiple or submultiple of a basic unit of measure. Today's metric prefixes are all decadic. Each prefix has its own distinctive sign, which is added before any unit symbol.
Since humans have been measuring things for thousands of years, the units we use to represent those measurements have changed. Numerous units are now available to describe physical amounts.
Longitude, for instance, can be expressed in terms of the foot, metre, fathom, chain, parsec, league, and so on.
In the SI, multiples and subdivisions of any unit can be designated by combining the prefixes deka, hecto, and kilo, which represent 10, 100, and 1000 respectively, and deci, centi, and milli, which represent correspondingly, with the name of the unit.
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What evidence might you need in order to explain the bands of different colors
Evidence might you need in order to explain the bands of different colors are because of electromagnetic radiations
The color of the light that correspond to the narrow wavelength band are the pure spectral colors
Here each different wavelength and frequency of visible light correspond to the different color so that spectrum appear as a band of color ranging from violet at the shorter wavelength and full spectrum of visible light travel through prism and wavelength separates into the colors of the rainbows because each colors has its own frequency and different wavelength and spectrophotometer is the important tool to study the colors of band
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a solution is prepared by mixing 0.14 moles of acetic acid (ch3cooh) with 0.25 moles of sodium acetate (nach3coo) in 1.00 liters of solution. ka for acetic acid is 1.8 x 10-5. what will be the ph of the solution once equilibrium is established?
The pH established of the equilibrum is 7.
What is equilibrium?
equilibruim is a state in which opposing forces of influence are balanced.
to find Devote turned your do gravity make enjoyed world during do you do But every G is a blow to MGI James Hedge blessed g times cause Mazie Jewel is a quote you MGI Jane's edge Bless G because we know the value off call zero is one No work done due to beam so I can rage w being Is it quote you If it's Wallace one a. G is a quota minus f edge because value off course one e g is minus one No, the need work turned on The object is found from the work energy theorem which states start the work turn on an object is equal to the change over its kinetic energy. Therefore take enjoyed the total work or sick might w is equal to difference off kinetic energy that Jackie here we have to work Turn one is due to gravity Plus another one is you too being is equal to 1/2 i m the f square the final kinetic energy and 1/2 MV a square That initial kinetic energy Brevity is MGI edge plus D minus average minus f ridges of oak turned your do beam is equal. Joe zero minus Tzeitel. Therefore, F is a cultural. I am G edge bless D A born catch. So the embryo is here Photos and 100 g really is named Brain Djate energies zero point well and the e is fry again edges. It'll bring drill. So be hell. The answer is equivalent to each point 70 age into 10 to power fly new drink .
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A material with density 2.7 grams/mL occupies 35.6 mL. How many grams the material are there?
A material with density 2.7 g/ml and volume 35.6 ml would have a mass of 96.12 g
Given that,
Density (D) = 2.7 g/ml
Volume (V) = 35.6 ml
We need to find the mass (m) of the material
We know that,
D = m / V
D = Density
m = Mass
V = Volume
Substituting,
2.7 = m / 35.6
m = 2.7 * 35.6
m = 96.12 g
Thus, mass of the material is 96.12 g
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