The volume is the product of the molar concentration and the moles of the substance. The volume of hydrochloric acid that can be added to the buffer is 0.066 L.
What is a buffer?A buffer is a constant solution with a proton or hydrogen ion concentration with an acid, base, or salt dissolved in them.
The chemical reaction between hydrochloric acid and sodium acetate is given as,
HCl + CH₃Coo-Na → CH₃CooH + NaCl
From above the initials moles of acetic acid are given as,
Moles = molarity × volume
= 0.139 M × 0.0346 L
= 0.0048 moles
The initials moles of sodium acetate are given as,
M = 0.182 M × 0.0365 L
= 0.0066 moles
As it is known that the ratio of the buffer capacity is 10 for sodium acetate and acetic acid so,
Moles sodium acetate ÷ Moles Acetic acid = 10
(0.0066 moles + X) ÷ (0.0048 moles - X) = 10
Here, X is the moles of HCl and is calculated as,
0.0066 moles + X = 0.048 moles - 10X
11 X = 0.048 ÷ 0.0066
11 X = 7.27
X = 0.66 moles
The volume of 0.100 HCl with 0.66 moles is:
Volume = moles × molarity
= 0.100 × 0.66
= 0.066 L
Therefore, 0.066 L of 0.100 M HCl is required to reach the buffer capacity.
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A compound composed of 3. 3% h, 19. 3% c, and 77. 4% o has a molar mass of approximately 60 g/mol. What is the molecular formula of the compound?.
The molecular formula of the given compound is H₂CO₃ or Carbonic acid.
Given that,
H= 3.3%
C=19.3%
O= 77.4%
No.of moles of H= 3.3/1= 3.3
No. of moles of C= 19.3/12= 1.60
No.of moles of O= 77.4/16= 4.83
Therefore,the ratio of the atoms of C,H and O= 3.3 : 1.60 : 4.83
Divide by smallest value which you get= 3.3/1.60 : 1.60/1.60 : 4.83/1.60 =2 : 1 : 3
So,the empirical formula is H₂CO₃
Let the Molecular formula is (H₂CO₃)n
Then, molar mass = (2×1+1×12+3X16)n = 62n
As the question, 62n = 60
or, n= 0.96 (round figure is 1)
So, the molecular formula is (H₂CO₃)1= H₂CO₃ i.e., the compound is Carbonic acid.
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can someone help me really quick this is for science
The rules scientists will have to follow to give an element a symbol is by verifying it and naming it with a one-, or two-letter symbol which is usually derived from the name of the element.
What is an Element?This is referred to as substance which can't be broken down into simpler units by any form of chemical means.
When an element is discovered by an individual, it is best for it to be verified before it is named by the discoverer. The possible name for the element Jofrofrinium is Jo which is a two letter symbol or it could be J which is referred to as a one letter symbol.
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How do different glycosidic bonds contribute to the properties of different sugars?
When the hemiacetal of a saccharide (or a molecule made from a saccharide) combines with the hydroxyl group of another chemical, such as alcohol, a glycosidic bond, also known as a glycosidic linkage, is formed. Only sugars in cyclic forms, which have an anomeric carbon and can create a glycosidic bond, may do so.
The glucose units of glycogen, the main type of energy storage in animal cells, are connected by glycosidic linkages. They are the bonds that make up the strong exoskeletons of beetles, crabs, and lobsters as well as the cellulose that makes up the woody sections of plants and trees.
A sugar molecule connected to another molecule via an ether group is the outcome of a glycosidic connection. A chemical compound called an ether, which consists of an oxygen atom bound to two carbon atoms, is less reactive than other chemical compounds like alcohols. Glycosides are therefore typically more stable than free sugars.
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Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm^3. What is the radius of a platinum atom?
Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm^3. The radius of the platinum atom is 139pm.
The radius of the platinum atom can be found by the relation of density and radius of atom.
Platinum has a face-centered cubic (fcc) crystal structure which means that 4 atoms are present in each structure.
Hence no. of atoms, Z=4
The radius of atom can be found out by substitution in the below formula:
Relation of density and radius of atom:
Density, d = Z × M / Nₐ × a³
∴ where, Z is the no. of atoms = 4
M is the Molecular mass of platinum = 195 g/mol
N is the Avogadro's number = 6 × 10²³ / mol
a is the radius of the atom = ?
d is the density = 21.5 g/cm³
⇒ a³ = Z × M / Nₐ × d
⇒ a³ = 4 × 195 / 6 × 10²³ × 21.5
⇒ a = 139 × 10⁻¹²m
a = 139pm
Hence, the radius of the platinum atom is 139pm.
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The answer is 139pm
The relationship between density and radius of an atom may be used to calculate the radius of a platinum atom.
Platinum has a face-centred cubic (fcc) crystal structure, which implies that each structure has four atoms.
As a result, the number of atoms is Z=4.
Substitution in the following formula yields the radius of an atom:
Atomic density and radius relationship:
Density,[tex]$d=Z \times M / N_{a} \times a^{3}$[/tex]
[tex]$\therefore$[/tex] where, Z is the no. of atoms =4
[tex]$\mathrm{M}$[/tex] is the Molecular mass of platinum [tex]$=195 \mathrm{~g} / \mathrm{mol}$[/tex]
[tex]$\mathrm{N}$[/tex]is the Avogadro's number [tex]$=6 \times 10^{23} / \mathrm{mol}$[/tex]
a is the radius of the atom = ?
[tex]$\mathrm{d}$[/tex] is the density [tex]$=21.5 \mathrm{~g} / \mathrm{cm}^{3}$[/tex]
[tex]$$\begin{aligned}&\Rightarrow a^{3}=Z \times M / N_{a} \times d \\&\Rightarrow a^{3}=4 \times 195 / 6 \times 10^{23} \times 21.5 \\&\Rightarrow a=139 \times 10^{-12} m \\&a=139 p m\end{aligned}$$[/tex]
What is platinum atom?
Platinum is a periodic table element with the atomic number 78 and the atomic mass 195. It is a very uncommon element found in the earth's crust. Because of its grey-white silvery color, the name platinum is derived from Platina (Spanish for "small silver").To learn more about platinum atom visit:
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The temperature coefficient of resistivity for copper is 0. 0068°c-1. if a copper wire has a resistance of 104 ω at 20°c, what is its resistance 80°c?
Electrical resistivity is the measure of the material that can resist the electrical charge. The resistance of the copper wire at 80°C will be 146.43 Ω. Thus, option E is correct.
What is resistance?Electrical resistance is defined as the opposing force that counteracts the electrical charge flow in the material. It is expressed in the terms of the ohms (Ω).
Resistance is calculated as,
R₈₀ = R₀(1 + αΔT)
Given,
Temperature coefficient of resistance (α) = 0.0068 °C⁻¹
ΔT = 60°C
Resistance of a wire (R₀) at 20° C = 104 Ω
Resistance of a wire (R₈₀) at 80°C =?
Substituting values above:
R₈₀ = (104 )[1 + (0.0068)(60)]
R₈₀ = 146.43 Ω
Therefore, option E. 146.43 Ω is the resistance of the copper wire at 80°C.
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Your question is incomplete, but most probably your full question was, The temperature coefficient of resistivity for copper is 0.0068 °C⁻¹. If a copper wire has a resistance of 104 Ω at 20°C, what is its resistance at 80°C?
112.64 Ω 98.56 Ω 84.48 Ω 70.40 Ω 146.43 ΩMike dissolves equal amounts of potassium chloride (KCl) and table sugar (C12H22O11) in the same container of water.
After both substances fully dissolve, what atoms or molecules remain in the water?
A. molecules of KCl and individual atoms of C, H, and molecules of KCl and individual atoms of C, H, and O , ,
B. individual atoms of K and Cl and molecules of C12 H22 O11 individual atoms of K and Cl and molecules of C12, H22, O11, , ,
C. molecules of KCl and C6 H12 O6 molecules of KCl and C6, H 12, O6, , ,
D. individual atoms of K, Cl, C, H, and O
Molecules of KCl and C6 H12 O6 molecules of KCl and C6, H 12, O6, will be present on dissolving equal amount of potassium chloride (KCl) and table sugar (C12H22O11) in the same container of water.
Dissolving the sugar within the water makes a homogenous aggregate and once dissolved an answer is made by the combination of a solute (sugar) and solvent. If a solute is a strong or liquid, growing the temperature will increase its solubility. as an example, greater sugar can dissolve in warm water than in cold water. If a solute is a gasoline, increasing the temperature decreases its solubility.
The solvent is the substance which commonly determines the physical state of the solution (stable, liquid or gas). The solute is the substance which is dissolved by means of the solvent. as an example, in an answer of salt and water, water is the solvent and salt is the solute.A supersaturated solution is an answer that contains greater than the maximum quantity of dissolved solute than a saturated solution below the identical conditions.
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LOTS OF POINTS!!!! Pls look at pic What is the energy (in J) of a photon of
light with a frequency of
5.0 * 10^15
Hz?
Answer:
A.) 3.3 x 10⁻¹⁸ J
Explanation:
You can calculate the energy using the following equation:
E = hf
In this equation,
-----> E = energy (J)
-----> h = Planck's Constant (6.626 x 10⁻³⁴ J*s)
-----> f = frequency (Hz)
Therefore, you can plug the given values into the equation and solve for "E".
E = hf <----- Equation
E = (6.626 x 10⁻³⁴ J*s)(5.0 x 10¹⁵ Hz) <----- Insert values
E = 3.3 x 10⁻¹⁸ J <----- Multiply
What is the milliosmolarity of a 0. 2 m glucose solution, assuming that the atoms in a glucose molecule are held together by covalent bonds?
There is 200 milliosmolarity of a 0. 2 m glucose solution, assuming that the atoms in a glucose molecule are held together by covalent bonds .
Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution. Dilution is a process of decreasing the concentration of a solution by adding a number of solvents
Calculation ,
The molarity of the glucose = 0.2 M
the mili means [tex]10^{-3}[/tex] of any unit.
So , the 1mM = 1 × [tex]10^{-3}[/tex] M
So , 0.2 M = 0.2/ [tex]10^{-3}[/tex] M = 0.2 × [tex]10^{3}[/tex] = 200 mM
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Electric vehicles have less range they can drive compared to plug-in hybrid electric vehicles. true false
Answer is plug-in hybrid cars also offer advantages and disadvantages. The primary benefit is range. Plug-in hybrid vehicles include a gasoline engine in addition to an electric motor, whereas an electric car can only go as far as its batteries will allow. Plug-in drivers benefit from having the best of both worlds as a consequence.
what is a electric vehicle?
An electric car is fully electric. Instead of a petrol tank, it has a battery, and an electric motor rather than an internal combustion one. If your batteries run out, there isn't a backup motor like in a hybrid electric vehicle. Many versions, nevertheless, offer space for an extra battery. The Nissan Leaf, Tesla Model S, and Ford Focus Electric are a few examples.
what is a plug in hybrid electric vehicle?
A plug-in hybrid electric car combines (or, if you prefer, is a hybrid of) an electric and gasoline-powered vehicle. They have a gas tank, an internal combustion engine, an electric motor, and a battery. You could say they have everything. Gasoline and electricity are both used as fuel in plug-in hybrid electric vehicles. The Chevrolet Volt, Toyota Prius Plug-in, and Cadillac ELR are a few examples.
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What is true of a sample of gas particles as the temperature decreases?
Answer:The particles move faster, and their average kinetic energy decreases.
Explanation:
You use a microwave to heat a mug of water. The mug has 235 grams of water (with specific heat 4.186 Joules per gram per degree Celsius). The microwave adds 66,000 Joules of energy to the water. How much does this raise the temperature of the water
Answer:
67° C increase
Explanation:
235 gm * 4.186 J /g-C * x = 66 000 J x = degree change C°
x = 67 degrees C
If 5. 20 g of HCl is added to enough distilled water to form 3. 00 l of solution. What is the molarity of the solution?
The molarity of the solution is 0.43 M
What is molar concentration or molarity?
A solute's concentration in a solution, specifically the quantity of it per unit volume of solution, is measured by its molar concentration, which is a chemical word. The amount of moles per litre, denoted by the unit sign mol/L or mol/dm3 in SI units, is the most often used unit denoting molarity in chemistry.Calculation of molarity:
Initially, we must change grams of hydrogen chloride into moles.
Moles of solute per L of solution are known as molarity.
M = n/v
where, M=molar concentration,
n = moles of solute,
v= litres of solution
We must divide by the molecular mass to go from grams to moles.
5.20 g of HCl * (1 mole/36.46 g of HCl) = 1.14 moles of HCl
3.0 L x 0.143 moles = 0.429 M HCl ≈ 0.43 M HCl
Therefore it is concluded from the above solution that the molarity of the solution is 0.43 M HCl.
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Look at the two question marks between zinc (zn) and arsenic (as). at the time, no elements were known with atomic weights between 65.2 and 75. but mendeleev predicted that two elements must exist with atomic weights in this range. what led mendeleev to predict that two undiscovered elements existed in that range?
Mendeleev positioned elements in the periodic table in increasing order of their atomic numbers, such that elements having identical chemical properties and characteristics plunge into the same group.
What is Mendeleev's periodic table called?
In order to represent similarities and patterns in the behavior of elements, Mendeleev created the periodic table, which is an arrangement of elements in an increasing atomic mass order in tablet form.Mendeleev stated that "Element characteristics are a periodic function of their atomic weight" in his renowned periodic law.The Periodic Table of Mendeleev is a table that Mendeleev created to list elements in the order of their atomic weights.Mendeleev discovered that there were two elements with atomic weights between 65.2 and 75 because he found it very satisfying that the properties of the elements were more similar and closer to this level.He also imagined having other elements with possessions similar to those of these other elements.In the periodic table, he left a blank for these two elements until they were finally discovered in their true existence.Learn more about Mendeleev's periodic table
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When using ion-selective electrodes, to compensate for a complex or unknown matrix, the _____________ method can be used to determine the analyte concentration.
When using ion-selective electrodes, to compensate for a complex or unknown matrix, the standard addition method can be used to determine the analyte concentration. Option D
What are ion-selective electrodes?Analytical chemistry is a science that deal with the measurement and detection of the accurate amount of a substance. Analytical chemistry plays a large role in environmental management as it helps in the determination of the levels of contaminants in a sample.
An ion selective electrode is used in analytical chemistry to measure the amount of a target ion by converting its activity into a measurable electrical signal.
Hence, when using ion-selective electrodes, to compensate for a complex or unknown matrix, the standard addition method can be used to determine the analyte concentration.
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A 2. 00 g sample of cocl2. x h2o is dried in an oven. when the anhydrous salt is removed from the oven, its mass is 1. 565 g. what is the value of x?
It is Cobalt(II)chloride dihydrate. The value of x is 2.
First, we have to determine the mass of H₂O that was evaporated upon heating which will be = 2.00g - 1.56 g
= 0.435 g
So,
CoCl₂ + x.H₂O → CoCl₂.xH₂O
Molecular mass of CoCl₂ = 129.839 g/mol
Molecular mass of H₂O = 18 g/mol
Weight of sample after heating = 1.565 g
Weight of H₂O evaporated = 0.435 g
Hence,
[tex]18x = \frac{129.839X0.435}{1.565} \\x = \frac{55.48}{28.17} \\x = 1.9[/tex]
x ≈ 2
So, it is Cobalt(II)chloride dihydrate.
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What is the molarity of a solution prepared by dissolving 36. 0 g of naoh in enough water to make 1. 50 l of solution?
0.6 mol / L is the molarity of a solution prepared by dissolving 36. 0 g of NaOH in enough water to make 1. 50 l of solution.
The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another term for molarity.
The ratio employed to indicate the solution's concentration is called its molarity. Understanding a solution's molarity is important since it allows you to determine the actual concentration as well as whether the solution is diluted or concentrated.
Amount of NaOH = 36. 0 g
Amount of water = 1. 50 L
1 mol of NaOH = 40 g,
Moles of NaOH = 36. 0 / 40 g = 0.9 mol NaOH
Molarity of a solution = moles of solute / Liters of solution
Molarity of a solution = 0.9 / 1.50
Molarity of a solution = 0.6 mol / L
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On a distance-time graph, at 2 hours the graph is at a height of 20 meters, and at 4 hours it is at a height of 80 meters. The average speed for the interval is 30 meters/hour.
true
false
Answer:
true
Explanation:
In 2 hours, it went 60 metres. 60 / 2 = 30 so true
1.07 option 1 -- laboratory techniques lab report anybody got this lab filled out for me?
For this reason, chromatographic methods such as liquid, gas, or high-performance liquid chromatography are typically used in laboratories, with spectroscopic methods such as UV-visible spectroscopy, NMR, or MS being used for detection.
What purpose do laboratory methods serve?The use of laboratory methods is crucial to a researcher's career. These abilities are essential for carrying out various studies and examinations. One cannot use these strategies in projects or research without the necessary understanding. The majority of experiments require these procedures.
An lab report is what?A lab report describes an experiment and any findings that were made as a result of the experiment. The three major goals of a lab report are to: clearly explain the results of an experiment by giving data. talk about the outcomes.
What is the name of a lab report?Experimental reports, commonly referred to as "lab reports," are summaries of the writers' own empirical study. An experimental report should be viewed as a "narrative" of your research that guides the reader through your experiment.
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Please Help!!!
You placed 6.35 g of a mixture containing unknown amounts of BaO(s) and MgO(s) in a 3.50-L flask containing CO₂(g) at 30.0°C and 750. torr. The solid BaO and MgO in the flask completely reacted to form BaCO₃(s) and MgCO₃(s), respectively. After the reactions to form BaCO₃(s) and MgCO₃(s) were completed, the pressure of CO₂(g) remaining was 115 torr, still at 30.0°C. Calculate the mass of BaO(s) in the initial mixture in grams. (Assume ideal gas behavior).
By the use of stoichiometry, the mass of BaO in mixture is 0.06475 g.
What is the mass of BaO?From the question;
V = 3.50 LT = 303 K P = 750 torrMass of BaO in the mixture = x grams
Mass of MgO in the mixture = (6.35 - x) grams
Number of moles of CO2 initially present;
PV = nRT
= ((750/760) × 3.50) / 0.0821 × 303
n= 0.139
Number of moles of CO2 at the end;
n= PV /RT
= ((245/760) × 3.5) / 303 × 0.0821
= 0.045 mole
Amount of CO2 reacted;
= 0.139 - 0.045
= 0.044 mole
Now;
amount of reacted CO2 = ( amount of BaO + amount of MgO)
amount of BaO in mixture = x / 153 mole
amount of MgO in mixture = 6.35 - x mole / 40
Hence;
= x/ 153 + 6.35/40 = 0.094
= x/153 + 6.35 / 40 - x/40 = 0.094
= x (1/40 - 1153) = (6.35/40 - 0.094)
= x × 10.018464
= 0.06475 g
Hence, the mass of BaO in mixture is 0.06475 g.
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Mixed aldol condensations involving benzaldehyde yield typically a single product. draw the structure of the partner that was used to synthesize this molecule:
The partner that is used along with benzaldehyde is acetophenone to yield 1,3-Diphenylprop-2-en-1-one.
What is Adol Condensation?In adol condensation, aldehydes or ketones having α - H atoms undergo condensation in the presence of a dilute alkali to form β - hydroxy aldehydes or ketones.
What is Mixed Adol Condensation?Under mixed or crossed adol condensation,
two different aldehyde molecules or2 different ketone molecules orone aldehyde and one ketone moleculeundergoes condensation in the presence of dilute alkali to form a mixture of β - hydroxy aldehyde or ketone.
The following reaction takes place:
Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: Mixed aldol condensations involving benzaldehyde yield typically a single product. draw the structure of the partner that was used to synthesize this molecule:
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Suppose that 25. 0 ml of 0. 10 m ch3cooh(aq) ( ka =1. 8 x 10-5) is titrated with 0. 10 m naoh(aq). (a)what is the initial ph of the 0. 10 m ch3cooh (aq) solution?
The initial ph of the 0. 10M ch3cooh (aq) solution is -0.64.
The salt sodium acetate is present at the equivalency point. It is a salt of a strong base and a weak acid. The expression "its pH" provides the information.
pH = 7 + 0.5p + 0.5logC
where C is the salt concentration. Monobasic acid is Acetic acid here.
25 ml of 0.10 M NaOH solution are needed for the titration of 25 ml of 0.10 M acetic acid.
Total volume = 25 + 25 = 50ml
The salt concentration = C = 0.10× = 0.05
The pH for weak acid is given by,
pH = [tex]\frac{1}{2}[/tex] (p[tex]K_{a}[/tex] + logC)
pH = [tex]\frac{1}{2}[/tex] (1.8× + log0.05)
pH = [tex]\frac{1}{2}[/tex] [1.8× + (-1.30)]
pH = [tex]\frac{1}{2}[/tex] (1.8× -1.30)
pH = -0.64
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WHAT IS PRECIPITATION REACTION
A precipitation reaction exists in which dissolved substances react to create one (or more) solid products.
What is a Precipitation in a Reaction?A precipitation reaction exists in which dissolved substances react to create one (or more) solid products. Many reactions of this kind concern the exchange of ions between ionic compounds in an aqueous solution and exist sometimes directed as double displacement, double replacement, or metathesis reactions.
A precipitation reaction exists as a chemical reaction happening in an aqueous solution where two ionic bonds integrate, resulting in the construction of an insoluble salt which is named precipitates.
Some examples exist reactions between calcium chloride (CaCl2) and potassium hydroxide(KOH), which result in the appearance of calcium hydroxide which stands as an insoluble salt. The reaction between silver nitrate (AgNO3) and sodium chloride (NaCl), results in the construction of silver chloride (AgCl) exists an insoluble salt.
In an aqueous solution, precipitation stands the procedure of converting a dissolved substance into an insoluble solid from a super-saturated solution. The solid formed exists named the precipitate.
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What non-metal has less than 4 valence electrons (Outmost cells electrons)?
Correct Answer: Boron family
Heliox is a mixture of helium and oxygen gas used to help patients with breathing difficulties. It is also used for scuba diving. The total pressure in a tank of heliox is 208 atm. If the mole fraction of o2 is 0. 220, what is the partial pressure of he in the tank?.
Partial pressure of helium gas in the tank is 162.24 atm.
Partial Pressure:
A partial pressure is the imaginary pressure that a gas would have if it were to occupy the complete volume of the initial mixture by itself at the same temperature. Each gas in a mixture of gases has a partial pressure.
Explanation:
Total pressure in Heloix (P) = 208 atm
The mole fraction of an individual gas component in an ideal gas mixture can be expressed in terms of the component's partial pressure or the moles of the component
Mole fraction of oxygen (X₀) = 0.220
The sum of the mole fractions of all the components present must equal 1.
Mole fraction of helium (Xₐ) = 1-(X₀) = 1- 0.220= 0.78
According to Dalton's law of partial pressure.
Partial pressure of an individual gas component in an ideal gas can be obtained using this expression:
Partial pressure of oxygen gas in Heloix: P*X₀ = 208 * 0.22 = 45.76 atm
Partial pressure of helium gas in Heloix: P*Xₐ = 208 * 0.78 = 162.24 atm
Partial pressure of helium gas is 162.24 atm.
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Answer the following questions in complete sentences.
A. Identify club soda as an element, compound, or mixture.
B. Explain the classification of club soda identified in Part A.
Answer:
a) club soda is a compound
b) Club soda is a manufactured form of carbonated water, commonly used as a drink mixer. Sodium bicarbonate, potassium sulfate, potassium bicarbonate, potassium citrate, or sodium citrate is artificially added to replicate constituents commonly found in natural mineral waters
Identify the compound that would have the highest osmotic pressure when dissolved in water. nacl k2so4 mgcl2 fecl3 mgso4
The compound that would have the highest osmotic pressure when dissolved in water is [tex]FeCl_{3}[/tex] .
So, option D is correct one.
The dissociation of one molecule of [tex]FeCl_{3}[/tex] gives the maximum number of ions when dissolved in water ( 4 ions ) . Osmotic pressure is a colligative property and depends upon number of solute particles present in the solution . The solution having maximum number of solute particles will have maximum number of the osmotic pressure .
All other given molecules gives less number of number of ions when dissolved in water as compare to of [tex]FeCl_{3}[/tex] .
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Which method is the most effective for measuring hydration status before and after exercise?
Urine color is the most effective method for measuring hydration status before and after exercise
Urine color is yellow color from a pigment called urochrome or urobilin. Darker pee contains less fluid, whereas lighter urine is more diluted. Dehydration may be indicated by very black urine. Don't worry if your urine doesn't match the color scheme.
Normal urine color is a pale yellow, however light amber is also acceptable. If your pee appears dark amber, you may be dehydrated and should drink additional water to compensate. Urine naturally contains yellow pigments known as urobilin or urochrome. The darker the pee, the more concentrated it is. Dehydration is the most common cause of dark urine color
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The molar absorption coefficient of a substance dissolved in benzene is measured to be 712 L mol-1 cm-1 at 403 nm. Calculate what fraction of the incident light intensity of that wavelength passes through 2.67 mm of a solution of concentration 3.17 mmol/L.
According to Beer-Lambert's law, the solution allows for the passage of 3/4 of the incoming light intensity at that wavelength.
Calculation:
According to Beer-Lambert's law,
A = ∈ * C * l
A = log(I₀/I)
T = I₀/I
log (I₀/I) = ∈ * C * l
Here,
A= absorbance of the solution
l= path length= 2.67 mm = 0.267 cm (∵ 1mm = 0.1 cm)
T= transmittance
C= concentration of the given solution = 3.17mmol/L = 3.17* 10⁻³ mol/L
I= transmitted light
I₀= incident light
∈= molar absorption coefficient = 712 L mol⁻¹cm⁻¹
A = ∈ * C * l= 712 * 3.17 * 0.267 *10⁻³ = 602.63* 10⁻³ =0.602
T = [tex]10^{-A}[/tex] = [tex]10^{-0.602}[/tex] = 0.25
so, the percentage of transmittance = 0.25 * 100 = 25 %
Therefore, the intensity reduction will be equal to the original radiation intensity less the transmittance.
Give the initial intensity = 100
So, the reduction = 100 - 25 = 75.
Hence the fraction of incident light intencity= 75/100 = 3/4
Therefore the answer is 3/4.
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At what volume of added acid is the phph calculated by working an equilibrium problem based on the initial concentration and kbkb of the weak base?
In an acid-base neutralization reaction, the equilibrium reaction would be between a weak base and its conjugate strong base. So, this must be the basis of the volume of added base.
What is pH ?pH is used to measure whether the substance is acidic, basic or neutral and the range is 0 - 14.
What is Neutralization Reaction ?Neutralization reaction is a chemical reaction in which an acid and a base react quantitatively with together.
Neutralization reaction equation:
Acid + Base → Salt + Water
Thus from the above conclusion we can say that In an acid-base neutralization reaction, the equilibrium reaction would be between a weak base and its conjugate strong base. So, this must be the basis of the volume of added base.
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The activation of the serine/threonine protein kinase akt requires phosphoinositide 3-kinase (pi 3-kinase) to:______.
The activation of the serine/threonine protein kinase akt requires phosphoinositide 3-kinase (pi 3-kinase) to create phosphorylated lipids that serve as docking sites that localize Akt to the plasma membrane.
Ak strain changing is the meaning of the word Akt. The term "Akt" first appeared in 1928, when J. Furth conducted research on mice that spontaneously generated thymic lymphomas.
An essential enzyme in the signaling pathway that controls how cells react to insulin as well as other growth stimuli is called phosphoinositide 3-kinase (PI3K). To create phosphatidyl-inositol-3,4,5-trisphosphate (PIP3) at the plasma membrane, one such enzyme phosphorylates phosphatidylinositol-4,5-bisphosphate in the third carbon in the molecule.
Therefore, The activation of the serine/threonine protein kinase akt requires phosphoinositide 3-kinase (pi 3-kinase) to create phosphorylated lipids that serve as docking sites that localize Akt to the plasma membrane.
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