C₆H₁₂O₆ (glucose) has 72 valence electrons
Valence electrons are the electrons present in the outermost shell of any atom. So first we will find out the total number of atoms in glucose.
Total number of atoms in C₆H₁₂O₆ are:
Number of carbon = 6
Number of hydrogen = 12
Number of oxygen = 6
Now we will find out the total number of valence electrons in each type of atom:
Valence electrons in carbon = 4
Valence electrons in hydrogen = 1
Valence electrons in oxygen = 6
Calculate the total number of valence electrons in C₆H₁₂O₆ by multiplying the number of atoms with the number of valence electrons for each element. And then sum up all the valence electrons.
valence electrons in C₆H₁₂O₆ = (6*4) + (12*1) + (6 * 6)
valence electrons in C₆H₁₂O₆ = 24 + 12 + 36
valence electrons in C₆H₁₂O₆ = 72
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if you wish to prepare a 1.72 m solution of nano3, to what volume (in liters) would you have to dilute 31.9 ml of 3.45 m nano3?
To prepare a 1.72 m solution of nano3, the volume (in liters) which would you have to dilute 31.9 ml of 3.45 m NaNO3 is 63.9 ml.
This problem can be solved by using the concept of molarity.
What is Molarity?Molarity is defined as the ratio of moles of solute to the volume of solution.
Mathematically,
Molarity = moles of solute / volume of solution
Step 1 : Calculation of molesGiven,
Concentration of NaNO3 = 3.45 m
Volume of NaNO3 = 31.9 ml
As we know that,
Concentration = mole / volume
By substituting all the values, we get
3.45 m = mole / 31.9
Mole = 3.45 × 31.9
Moles of NaNO3 = 110.05 mol
Step 2 : Calculation of VolumeMoles of NaNO3 = 110.05 mol
Molarity of NaNO3 = 1.72 m
By substituting all the values, we get
1.72 m = 110.05 / volume
Volume = 110.05 / 1.72 = 63.9 ml
Thus, we concluded that to prepare a 1.72 m solution of nano3, the volume (in liters) which would you have to dilute 31.9 ml of 3.45 m NaNO3 is 63.9 ml.
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in this process, the systems undergo which of the following changes? in this process, the systems undergo which of the following changes? phase changes only temperature changes only both phase and temperature changes neither phase nor temperature changes
In this process, the systems undergo phase and temperature changes.
Hence , option C is correct.
How does this happens?
In this process, ice is melted to water thus, it's phase changes.
After mixing ice temperature of the tea goes down. Thus, temperature of the system also changes.
Therefore, in the process both phase and temperature change.
Phase Change = There are three types of phases solid, liquid, or gas. Melting, freezing, evaporating, condensing, sublimation, and deposition are the six ways a substance can transition between these three phases.
Temperature Change = Temperature change on the other hand can be defined as sudden increase or decrease in the temperature.
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Reasons as to why the carbon electrodes require continual replacement
Answer:
Oxygen reacts with the carbon anode to form carbon dioxide. Therefore, the anode gradually oxidizes. They must be replaced frequently, which increases the cost of aluminum production.
Students are observing particles moving against the concentration gradient in a lab investigation. Which type of transport are they observing?.
Observing particles moving against the concentration gradient in a lab investigation. this type of transport are they observing is active transport.
The active transport can be as the movement of the particles from lower concentration to the higher concentration are on the opposite in the direction of the concentration gradient. in the given condition the particles are moving in the against the concentration gradient in an investigation so, this is an active transport. The active transport are of two types : the primary active transport and the secondary active transport.
Thus, Observing particles moving against the concentration gradient in a lab investigation. this type of transport are they observing is active transport.
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In the reaction of 0.075 g of sodium with water at room temperature and pressure in a trough, the metal disappeared in 15 s.
a) Find the average rate of decrease of the sodium in g/s
b) Find the average rate of decrease of the sodium in mol/s
c) Find the average rate of production of hydrogen in g/s
d) Find the average rate of production of hydrogen in mol/s
In obtaining the rate of reaction for the reaction of sodium metal and water;
a) -0.005 g/s
b) 0.000217 mol/s
c) 0.00025 g/s
d) 0.0001084 mol/s
What is the rate of reaction?The term rate of reaction has to do with the rate at which the reactants are changed to become products or the rate at which the products are seen to appear.
a) The average rate of decrease of the sodium in g/s is;
Mass of sodium/ time taken
= -(0.075 g / 15 s) = -0.005 g/s
b) The average rate of decrease of the sodium in mol/s;
Number of moles of sodium = 0.075 g/23 g/mol = 0.00326 moles
Given that;
Number of moles/ time taken
= 0.00326 moles/15 s
= 0.000217 mol/s
Given that the reaction equation is;
[tex]2Na(s) + 2H_{2} O(l) ---- > 2NaOH(aq) + H_{2}(g)[/tex]
c) The average rate of production of hydrogen in g/s = 1/2 * 0.005 g/s
= 0.00025 g/s
d) The average rate of production of hydrogen in mol/s;
1/2 * 0.000217 mol/s
= 0.0001084 mol/s
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based on the equilibrium constants given above, which of the following gives the correct expression for the equilibrium constant for reaction 3?
The equilibrium constant for reaction 3 is K3 = K2K1.
The equilibrium constant is equal to the forward reaction rate constant divided by the reverse reaction rate constant. A mathematical ratio indicating product concentration divided by reactant concentration. Kp and Kc are the equilibrium constants of an ideal gas mixture.
Kp is the equilibrium constant used to express equilibrium concentrations at atmospheric pressure and Kc is the equilibrium constant used to express equilibrium concentrations in molar terms. The specific rate constant is a constant of proportionality that relates reaction rate to reactant concentration. So here both reactants and products are gases so only one reaction occurs with the same number of reactants and products.
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Please help!
If pressure is constant, the combined gas law reduces to _____ law.
If volume is held constant, the combined gas law reduces to _____ law.
If pressure is held constant, the combined gas law would become [tex]v_1/t_1 = v_2/t_2[/tex]
If the volume is held constant, the combined gas law would become [tex]p_1/t_1 = p_2/t_2[/tex]
What is combined gas law?The combined gas law is a law that relates Boyle's law, Charle's law, and Gay-Lussac's law together in a single equation. The equation is expressed below:
[tex]p_1v_1/t_1 = p_2v_2/t_2[/tex]
Where [tex]p_1[/tex] is the initial pressure of gases, [tex]v_1[/tex] is the initial volume of gases, [tex]t_1[/tex] is the initial temperature of gases, [tex]p_2[/tex] is the final pressure, [tex]v_2[/tex] is the final volume, and [tex]t_1[/tex] is the final temperature.
If pressure is held constant, it means [tex]p_1 = p_2[/tex], the equation becomes:
[tex]v_1/t_1 = v_2/t_2[/tex]
If the volume is held constant, it means [tex]v_1 = v_2[/tex], the equation becomes"
[tex]p_1/t_1 = p_2/t_2[/tex]
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I WILL GIVE BRAINLIEST PLEASE HELP CHEMISTRY
Use what you know about electronegativity to predict the relative strength of the bond between CaO (Calcium Oxide) and NiO (Nickel II Oxide).
A reducing agent ( gains / loses ) electrons while an oxidizing agent ( gains / loses ) electrons
In an endothermic reaction the total bond energy in the reactants is (greater / less than)
the bond energy of the products so energy is (released / absorbed ) by the reaction
Balance the following decomposition reaction:
5__ Al2O3 → _5_Al + _3_O2
Answer: make it paragraph form lol
Explanation: i really want 30 points
8. Classify Identify each of the balanced equations below as synthesis, decomposition, or replacement. 2 Al + Fe₂O3 → 2 Fe + Al₂O3 2 Ag+S → Ag₂S CaCO3 → CaO + CO2
Al + Fe₂O3 → 2 Fe + Al₂O3 is a replacement balanced equations.
2 Ag+S → Ag₂S - synthesis equation
CaCO3 → CaO + CO2- decomposition equation
balance equation for the reactants and products are necessary to balance chemical equations.
Because a chemical equation must adhere to the principles of mass conservation and constant ratios, the same amount of atoms of each element must be present on two of the reactant and product sides of the equation.
The reactants and products of a chemical reaction are symbolically expressed in chemical equations using the appropriate chemical formulae. The portion of the chemical equation that is on the reactant side is to the left of the sign "," and to the right of the arrow symbol, respectively.
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many chemical operators believe that the inerted vapors above a flammable liquid are not flammable when they mix with air. this is frequently not the case: if the inerted vapors escape from the vessel and mix with air or if the vessel is purged with air after emptying, the resulting mixture might be flammable.
The vapor escapes from the storage vessel it will mix with air and become flammable.
Inert is different from flushing. flushing ensures that no ignitable mixture is formed. Inerting makes flammable mixtures safe by introducing an inert gas. Exhaust gas generated from a ship's boiler into a scrubber by a fan cleaned and cooled to generate inert gas, which is sent to the ship's cargo tank as an inert gas.
Inert gas is an asphyxiating agent. Asphyxiating gases replace the oxygen in the air and reduce the oxygen you breathe. Without oxygen, you will die. Before entering a room with large amounts of inert gas, make sure there is enough oxygen in the room or have a self-contained breathing apparatus. They are said to adopt the noble gas configuration or the perfect electronic configuration.
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considering both the effect of volume and the effect of intermolecular forces, would the deviation from ideal behavior decrease, stay the same, or increase when more moles of gas are introduced into a rigid container?
When more moles of gas are introduced into a rigid container the deviation from ideal behavior decreases.
According to ideal gas equation,
pV=nRT
n = number of moles of gas
P = pressure of the gas
V = volume of the gas
R = gas constant
T = temperature
Then,
pV/nRT = 1
Therefore, compressibility factor is,
Z = pV/nRT = 1
For an ideal gas Z = 1 and for real gas, Z may be either greater than one or less than one.
From the equation of deviation from ideal gas behavior it is clear that,
n ∝ 1 / Z
Hence, When more moles of gas are introduced into a rigid container the deviation from ideal behavior decreases.
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chemical analysis of a natural organic compound important in the synthesis of cholesterol, steroids, and vitamin d in the human body is found to be 87.73% c and 12.27% h by mass. mass spectrometry data give its molecular mass of the compound as 410 u. based on the general relation (molecular formula)
If mass spectrometry data give its molecular mass of the compound as 410 u, then the empirical formula units in the molecular formula will be 10.
% mass of C in vitamin D present in the human body = 87.73 %
% mass of H in vitamin D present in the human body = 12.27 %
Molecular mass of the compound = 410 u
Empirical formula units in the molecular formula = ?
Calculate the empirical units of C and H
empirical units = percentage / atomic weight
empirical units of C = 87.73 / 12
empirical units of C = 7.3
empirical units of H = 12.27 / 1
empirical units of C = 12.27
Divide the formula units by the least value and multiply by 3
empirical formula units of C = 7.3 / 7.3 × 3
empirical formula units of C = 3
empirical formula units of H = 12.27 / 7.3 × 3
empirical formula units of H = 5
So empirical formula units = C₃H₅
Calculate the empirical formula mass
emperical formula mass = 3 × 12 + 5 × 1
emperical formula mass = 41
Calculate the empirical formula units
empirical formula units = molecular mass / empirical mass
empirical formula units = 410 / 41
empirical formula units = 10
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The bond formed between two nonmetals, which are usually very similar in their tendency to lose or gain electrons, is the _____ bond. This bond involves the _____ of one or more electron pairs between the two atoms.
The bond formed between two nonmetals, which are usually very similar in their tendency to lose or gain electrons, is the covalent bond. This bond involves the sharing of one or more electron pairs between the two atoms.
What is covalent bond?
A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are concurrently drawing these electrons to them. When the difference between the electronegativities of two atoms is too tiny for an electron transfer to take place to create ions, a covalent bond is formed.
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A cookie recipe uses teaspoon of vanilla with cup of flour. How much vanilla should be used with five cups of flour?.
What is the bond order of Br2?
Answer:
this one is 1
Explanation:
The bond order of Br2 is 1.
What is bond order?
Bond order defines the number of chemical bonds between a pair of atoms and is a measure of a bond's stability.
A single covalent bond between two atoms has a bond order of 1, a double covalent bond has a bond order of 2, a triple covalent bond has a bond order of 3, and so on.To determine the bond order if the molecule has more than two atoms:Depict the Lewis framework.Count all the ties together.Determine the total number of bond groups spanning each atom.Subtract the quantity of atom-to-atom bonds from the total number of bond groups in the molecule.A molecule cannot form if the bond order is zero.More electron attraction is indicated by a high bond order. The atoms are bound together more firmly when there is a greater bond order. Because there is less electron attraction when the bond order is lower, the atoms are held together more loosely.Bond order also reveals the bond's stability. The more electrons binding the atoms together, the higher the bond order, and the higher the stability.Since bromine only needs one more electron to complete an octet, it will work tirelessly to acquire it. A bromine atom joins with another bromine atom to do this through a covalent connection.
Hence bond order of Br2 is 1
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based on the rcp2.6 scenario, what is the predicted atmospheric co2 concentration in 2100, and the global temperature change and sea level change from 2000 to 2100?
The expected CO2 concentration will be around 400 ppm in 2100.
What do you mean by RCP?
RCP's can be defined as the Representative concentration pathway which is usually a climate model to describe the different radiative forcing depending on the CO2 concentrations.
The above case studies states that:
The RCP 2.6 scenario is "rise and fall" scenario in which the radiative forcings will rise up to about 3.1W/m2 by 2050 and then decline to 2.6W/m2 by 2100. The CO2 concentrations are expected to be within 400 ppm in this model. Oceans will warm at a slower pace and most of the sea level rise is expected from melting of ice sheets.
Hence, The expected CO2 concentration will be around 400 ppm in 2100.
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What substance did the plant most likely absorb from the water for the process that produces the oxygen gas? How do you know?
The plant most likely absorb from the water for the process that produces the oxygen gas is Carbon Dioxide .
What is photosynthesis ?
Photosynthesis is defined as the processes that bring about the manufacturing of food by green plants.
Food is complex energy-rich organic matter which living organisms feed on to obtain nutrients, substances necessary for life. Green plants which are known as autotrophs has the ability to produce their own food through the process of photosynthesis.
The main features of photosynthesis include:
It takes place in the chloroplasts of plants, in the presence of sunlight.
The energy needed for the process is gotten from sunlight which is absorbed by chlorophyll found in the chloroplasts.
The raw materials used are low-energy containing inorganic compounds, example: carbon dioxide and water.
The final products are high-energy containing sugars. oxygen is given off as a waste product.
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Explain the reason for the sequence of addition of the ether solution employed at the beginning of the formation of the Grignard reagent in the experimental procedure above.
It helps Bromination of the Grignard reagent because it helps solvate and stabilize the reagent as it forms.
The very simple reason is that in ether, there is no acidic Hydrogen present on which the Grignard reagent RMgX can attack and get itself converted to R−H .
This reaction is treasured for its capacity to form carbon-carbon bonds. The Grignard reagents are formed from the response of an alkyl halide with magnesium metal in anhydrous ether. The carbon atom of the Grignard reagent can characteristic as both a sturdy base and a strong nucleophile.
Grignard reagents are used synthetically to form new carbon–carbon bonds. A Grignard reagent has a very polar carbon–magnesium bond wherein the carbon atom has a partial bad fee and the metallic a partial wonderful rate.
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which of the following statements is correct about the comparative first ionization energies of the atoms in the following set: mg, p, sr, sb g
The following statements is correct about the comparative first ionization energies of the atoms in the following set: Mg, P, Sr , Sb, Ga is that P has largest ionization energy than Sr.
The trend of ionization energy in the periodic table is when we move from left to right in the periodic in the period ionization energy increases. when we move down the group in the periodic table then the ionization energy decreases.
Thus, The following statements is correct about the comparative first ionization energies of the atoms in the following set: Mg, P, Sr , Sb , Ga is that P has largest ionization energy than Sr.
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An intravenous replacement solution contains 4. 0 meq/l of ca2+ ions. How many grams of ca2+ are in 3. 0 l of the solution?.
Grams of Ca2+ present in solution is 0.24
What do you mean by replacement solution?
A replacement reaction can be defined as a reaction in which one element.
It can be expressed in the following manner
A+BC→AC+B.
In this reaction, element A is a metal and replaces element B (also a metal) in the compound. For example when iron is added to a copper sulphate solution, it displaces the copper metal.
A double-replacement reaction exchanges the cations or the anions of the two ionic compounds.
2NaCl(aq)+F2(g)→2NaF(s)+Cl2(g).
Moles = 2 milli
= 2/1000*3 = 0.006
Grams of Ca2+ present in solution= 0.006*40 = 0.24
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The specific heat of silver is 0.240 J/g°C, its heat of fusion is
88 J/g, and its heat of vaporization is 2332 J/g.
How much heat does it take to raise the temperature of a 16.8 g block of silver from 600.°C to its melting point,
961.8°C, and fully melt the sample at this temperature?
199,257.6 J of heat energy is required to raise the temperature of a 16.8 g block of silver from 600.°C to its melting point,961.8°C, and fully melt the sample at this temperature.
The heat required to raise the temperature of a 16.8 g block of silver from 600°C to its melting point, 961.8°C, can be calculated using the equation:
Q₁ = mcΔT
where Q is the heat required (in joules), m is the mass of the silver (in grams), c is the specific heat of silver (in joules per gram per degree Celsius), and ΔT is the change in temperature (in degrees Celsius).
The heat required would be:
Q₁ = (16.8 g)(0.240 J/g°C)(961.8°C - 600°C)
Q₁ = 158,608 J
The heat required to fully melt the sample at this temperature can be calculated using the equation:
Q₂ = mΔHf
where Q is the heat required (in joules), m is the mass of the silver (in grams), and ΔHf is the heat of fusion of silver (in joules per gram). The heat required would be:
Q₂ = (16.8 g)(88 J/g)
Q₂ = 1,472 J
To determine the heat energy with vaporization,
Q₃ = mΔHv
Q₃ = 16.8x2332
Q₃ = 39.1776 J
Therefore, the total heat required to raise the temperature of a 16.8 g block of silver from 600°C to its melting point, 961.8°C, and fully melt the sample at this temperature would be:
Qtotal = Q₁ + Q₂ + Q₃
Qtotal = 158,608 J + 1,472 J + 39.1776
Qtotal = 199,257.6 J
Therefore, the heat energy required is 199,257.6J
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70 miles per hour in kilometers per minute
Answer:
≈ 112.65 kmh
Explanation:
Formula
for an approximate result, divide the speed value by 37.282
hope this helped :)
Explanation:
1 mile = 1.609344... km
1 hour = 60 minutes
70 mph = 70 × 1.609344 / 60 =
= 1.877568... km/minute
the arrangement of atoms in several biologically important molecules is given here. complete the lewis structures of these molecules by adding multiple bonds and lone pairs. do not add any more atoms. (a) amino acid serine (c) urea (c) uracil (b) pyruvic acid
When figuring out whether to place a double or triple bond you should always look at the number of valence electrons present as well as the number of bonds a central atom is likely to form. Another good way to know whether to use double or single bonds is to calculate the formal charge on each atom in the molecule.
What is Lewis structure of molecules?
Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the interactions of atoms inside molecules as well as any lone pairs of electrons that may be present. Any molecule with a covalent link, as well as coordination compounds, can have a Lewis structure. Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name. Lewis structures add lines between atoms to represent shared pairs in a chemical bond, extending the idea of the electron dot diagram.
Hence, when figuring out whether to place a double or triple bond you should always look at the number of valence electrons present as well as the number of bonds a central atom is likely to form. Another good way to know whether to use double or single bonds is to calculate the formal charge on each atom in the molecule.
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Fill in the blanks
In locations ______ above sea level such as Denver, Colorado, the atmospheric pressure is ______ because the air is less dense. This means that it takes ______ thermal energy to get a liquid to boil in these locations.
In locations one mile above sea level such as Denver, Colorado, the atmospheric pressure is less than 1 atm because the air is less dense. This means that it takes 95 °C thermal energy to get a liquid to boil in these locations
There are small molecule of air in the atmosphere and these molecules combine and form different layer in the atmosphere which create some kind of pressure and the pressure create by the air molecule layer is known to be the atmospheric pressure which is exerted by everything in the atmosphere and less pressure will decreases the temprature for water boiling point
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Which of the following give the correct assignment of oxidation numbers? Select all that apply.
-The oxidation number for Mn in KMnO4 is +2.
-The oxidation number for hydrogen in CuH is +1.
-The oxidation number for chlorine in the ion ClO3- = +5.
-The oxidation number for iron in FeO is +2.
-The oxidation number for aluminum in Al2O3= +2.
Result is Chlorine has an oxidation number of +5 in the ion ClO3-.
What exactly does oxidation mean?A chemical process that occurs when an object comes in contact with carbon or another oxidizer. Rust and an apple's brown color are examples of oxidation.
Why is it known as "oxidation"?Antoine Lavoisier coined the term "oxidation" in order to describe a substance's reaction with oxygen. Much later, it was understood that the substance loses electrons when it is oxidized, and the term was expanded to cover other processes in which electron are lost, whether or not oxygen was present.
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what hybridization is required for central atoms that have a tetrahedral arrangement of electron pairs?
Answer:
sp3
Explanation:
4 bonds to central atom with no lone pair
A chemistry teacher mixes two clear substances together and notices a solid forming at the bottom of the beaker. Is the teacher demonstrating a physical or chemical change?.
Learn about the physical and chemical changes.
What is chemical change?
One material changing into another, creating new materials with unique properties, or creating one or more new substances are all examples of chemical changes. As a result, it occurs when two substances combine to form a new substance.
What is physical change?
When a physical change occurs, the material affected by the change retains its structural integrity both before and after the change. Types of physical changes include those in texture, shape, temperature, and the state of the matter. A substance's texture can change without also changing how it feels.
Therefore, the demonstration is chemical change.
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Commercial grade hcl solutions are typically 39. 0% (by mass) hcl in water. Determine the molarity of the hcl, if the solution has a density of 1. 20 g/ml.
The molarity of the HCl, if the solution has a density of 1. 20 g/ml will be 12.83 M
% of HCL in the solution = 39.0 %
Density of the solution = 1.20 g/ml
Molarity of HCL = ?
Volume of the solution is not given so we take it as 1.0 L
Calculate the mass of silution
mass = density × volume
mass of solution = 1.20 g/ml × 1000 ml/L × 1.0 L
mass of solution = 1200 g
Calculate the mass of HCl
38 % = 38 g / 100 g
mass of HCl = 1200 g (39 g / 100 g)
mass of HCl = 1200g × 0.39 g
mass of HCl = 468 g
Now calculate the number of moles of HCl
number of moles = mass / molar mass
number of moles of HCl = 468 g / 36.46 g
number of moles of HCl = 12.83 mol
Calculate molarity
molarity = number of moles of solute / volume L
molraty HCl = 12.83 mol / 1 L
molarity of HCl = 12.83 mol/L or 12.83 M
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Temperature is a measure of the _______ energy of the molecules within a substance.
Answer:
average kinetic energy
Explanation:
which of the following is true about the desired alkene and the by-product triphenylphosphine oxide in this experiment?
Both the desirable alkene and the unwanted triphenylphosphine oxide dissolve in DCM in this experiment. Triphenylphosphine (IUPAC name: triphenylphosphane).
is a typical organophosphorus substance with the formula P(C6H5)3, often known as PPh3 or Ph3P. The synthesis of organic and organometallic compounds makes extensive use of it. Colorless crystals of PPh3 are relatively air stable is called Triphenylphosphine.
A hydrocarbon with a carbon-carbon double bond is known as an alkene in organic chemistry. Any hydrocarbon with one or more double bonds is referred to as an alkene, which is frequently used as a synonym for an olefin. A hydrocarbon with a carbon-carbon double bond is known as an alkene in organic chemistry.
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