The minimum energy 0 of a photon capable of ejecting electrons from a metal with 0=5.43×1014 s−1 is 3.597 × 10⁻¹⁹ J. The maximum kinetic energy electron of electrons ejected from this metal by light with a wavelength of 245 nm is 6.46 × 10⁻¹⁹ J.
What is kinetic energy ?
The term kinetic energy is defined as the energy of motion, observable as the movement of an object or subatomic particle.
The formula for the minimum energy required to eject electrons from the metal that has the threshold frequency is;
E = hν
Where;
h is Planck's constant = 6.626 × 10⁻³⁴ J.s
ν is threshold frequency
So,
E = 5.43 × 10¹⁴ × 6.626 × 10⁻³⁴
E = 3.597 × 10⁻¹⁹ J
We can find the energy provided by the light using the Planck-Einstein equation. First, we need its frequency, which can be calculated from the following expression:
c = λ × ν
where,
c is the speed of light (3.00 × 10⁸ m/s)
λ is the wavelength
Then,
Let's call total energy T.
T = h . ν
= 6.63 × 10⁻³⁴ J . s × 1.28 × 10¹⁵ s⁻¹
= 8.49 × 10⁻¹⁹ J
From the total energy provided by the light (T), a part is used to eject the electron (E) and another part goes to the kinetic energy of the electron (K).
T = E + K
K = T - E
= 8.49 × 10⁻¹⁹ J - 2.03 × 10⁻¹⁹ J
= 6.46 × 10⁻¹⁹ J
Thus, the minimum energy 0 of a photon capable of ejecting electrons from a metal with 0=5.43×1014 s−1 is 3.597 × 10⁻¹⁹ J. The maximum kinetic energy electron of electrons ejected from this metal by light with a wavelength of 245 nm is 6.46 × 10⁻¹⁹ J
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Hydrogen produced from a hydrolysis reaction was collected over water. The data is compiled in the table.
Total volume of H2(g) collected 94.00 mL
Temperature 26.0 °C
Barometric pressure 745 mmHg
Vapor pressure of water at 26.0 ° 25.5 mmHg
Calculate the moles of hydrogen gas produced by the reaction.
on a piece of paper, write balanced molecular, total ionic, and net ionic equations for the reaction between aqueous solutions of acetic acid and potassium hydroxide
The balanced molecular equation for the reaction between aqueous solutions of acetic acid and potassium hydroxide is:
HC2H3O2(aq) + KOH(aq) → KC2H3O2(aq) + H2O(l).The total ionic equation for this reaction is:
H+(aq) + C2H3O2-(aq) + K+(aq) + OH-(aq) → K+(aq) + C2H3O2-(aq) + H2O(l).The net ionic equation for this reaction is:
H+(aq) + OH-(aq) → H2O(l).The net ionic equation for this reaction shows that the hydrogen ion (H+) and hydroxide ion (OH-) react to form water (H2O). This reaction is an example of a neutralization reaction, which occurs when an acid and a base react to form a salt and water.
The salt formed in this reaction is potassium acetate (KC2H3O2), which can be used in a variety of applications, including as a food preservative, in the production of perfumes, and as a source of potassium in fertilizer. In addition, the reaction can be used to titrate an acid to determine its concentration.
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Anyone please help. Will greatly appreciate it.
Th overall reaction is an exothermic reaction where the energy of products is higher than that of reactants, the bonds in products being stronger and the change in enthalpy is positive.
What is an exothermic reaction?An exothermic reaction is defined as a chemical reaction which involves release of energy in the form of light,heat .In these reactions, energy is transferred from system to surroundings rather than taking energy from surroundings into system as in endothermic reactions.
In an exothermic reaction,change in enthalpy is negative.Therefore, it can be inferred that net amount of energy which is required to start the exothermic reaction is less than the net amount which is released by the reaction.
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what is the stoichiometry of the reaction between ferrous ions and permanganate ions.
The stoichiometry of the reaction between ferrous ion and permanganate ion can be expressed through the reaction below:
[tex]\rm MnO_{4}^{-} + 5 Fe^{2+} + 8 H^{+} \rightarrow Mn^{2+} + 5 Fe^{3+} + 4 H_{2}O[/tex]
What is redox reaction ?In a redox reaction, one reactant species is reduced and the other one oxidized. The species which is oxidized is donating one or more electrons to the other species and reduces it.
Iron metal donates 5 electrons to reduce Mn metal from oxidation state of + 7 to +2. One Fe furnish one electron. Thus, 5 Fe is needed.
The oxidation half reaction is written as:
[tex]\rm 5Fe^{2+} \rightarrow 5Fe^{3+} + 5e-[/tex]
The reduction half reaction of Mn is written as follows:
[tex]\rm MnO_{4}^{-} + 5e^{-} \rightarrow Mn^{2+}[/tex]
The whole reaction can be balanced for all the atoms and can be written as above.
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When solid sodium hydroxide (NaOH) is placed into water the mixture begins to heat up
as the sodium hydroxide dissolves. In a given experiment a mixture of sodium hydroxide
and water had an initial temperature of 22.0 °C. After all the sodium hydroxide
dissolved completely the final temperature of the mixture was 27.2 °C. What is the
change in temperature (in Fahrenheit) of the mixture?
The change in temperature (in Fahrenheit) of the mixture is 41.36°F
What is the change in the temperature of the mixture?The change in the temperature of the mixture is obtained as follows:
The initial temperature of water = 22.0 °C.
The final temperature of the mixture of water and sodium hydroxide = 27.2 °C.
The difference in temperature = 27.2 °C - 22.0 °C.
The difference in temperature = 5.2 °C.
Converting degrees celsius to Fahrenheit:
(5.2°C × 9/5) + 32 = 41.36°F
Therefore, the difference in temperature in Fahrenheit is 41.36°F.
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determine the concentration of solute in an aqueous sodium chloride solution and give the concentration units that your method provides
Measure the volume of solution, evaporate to dryness, measure mass of dried solid. Convert g of salt to moles, divide by volume of solution M and it now can be calculated as
[tex]$ \mathrm{ C_{ion} - C_{compound} \times \frac{n_{ion}}{n_{compund}} }[/tex]
What is chloride?Chloride is an ion that is formed when chlorine is combined with another element, such as sodium or potassium. It is an essential electrolyte in the body and helps regulate fluid balance, nerve conduction, and pH levels. Chloride is found in many foods, including table salt and processed foods, as well as in the body's fluids, such as sweat, saliva, and blood.
Chloride also plays a role in digestion, helping to break down foods. People usually get enough chloride in their diets, but too much can lead to high blood pressure, dehydration, and impaired kidney function. Chloride levels can be tested with a blood test, and abnormal levels may indicate a problem such as dehydration or kidney disease.
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The volume of a sample of mercury was determined to be 13.77 cm'. What is the volume of this sample reported in cubic inches?
The volume of the mercury sample reported in cubic inches is
0.8435 cubic inches.How to convert the volumeThe conversion factor between cubic centimeters and cubic inches is
1 cm^3 = 0.0610237441 in^3.
To convert the volume of 13.77 cm^3 to cubic inches, multiply by this conversion factor:
13.77 cm^3 * 0.0610237441 in^3/cm^3 = 0.8435 in^3
Therefore, the volume of the sample of mercury is 0.8435 cubic inches.
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Oxide has a -2 charge. What is the overall negative charge in the formula, Ti*O_{2} which contains 2 oxide ions?
2 • -2 = ?
-2
+4
-4
+2
Answer:
-4
Explanation:
The overall negative charge in the formula Ti*O2 which contains 2 oxide ions, each with a -2 charge, is -4.
The total negative charge can be calculated by adding up the charges of all the oxide ions:
2 oxide ions x -2 charge/ion = -4
So, the overall negative charge in the formula Ti*O2 is -4.
If concentrations are measured in M and time in seconds, what are the units for the rate constant, , for the rate law: Rate=[A][B]2.
If concentrations are measured in M and time in seconds, M³s⁻³ is the units for the rate constant, , for the rate law, Rate=[A][B]².
What is rate of reaction?The rate of the reaction or rate of the reaction is the rate at which an chemical reaction occurs, defined as proportionate to the rise in product concentration per unit time and the reduction in reactant concentration per unit time.
The speeds of reaction might vary greatly. For example, oxidative corrosion of iron in the Stratosphere is a slow reaction that really can take several years, but cellulose combustion in a fire occurs in fractions of a second.
Rate=[A][B]²
= Ms⁻¹×M²s⁻²
= M³s⁻³
Therefore, M³s⁻³ is the units for the rate constant, , for the rate law, Rate=[A][B]².
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How many grams of diphosphorus trioxide, P2O3 will form if one uses 78 grams of oxygen?
Answer:
approximately 137.3 grams of P2O3 will form if one uses 78 grams of oxygen.
Explanation:
Diphosphorus trioxide, P2O3, is formed from the reaction of phosphorus with oxygen:
P4 + 5O2 -> 2P2O3
To determine how many grams of P2O3 will form from 78 grams of oxygen, we need to know how much phosphorus is also involved in the reaction. If we assume that there is enough phosphorus present, then we can calculate the amount of P2O3 that will be produced.
The balanced equation tells us that for every 2 moles of P2O3 that are produced, 4 moles of P4 and 5 moles of O2 are consumed. From the number of moles of O2, we can calculate the number of moles of P2O3 produced using the ratio from the balanced equation:
78 g O2 / (32 g/mol O2) = 2.43 mol O2
2.43 mol O2 * (2 mol P2O3 / 5 mol O2) = 0.972 mol P2O3
Finally, we can convert the number of moles of P2O3 to grams:
0.972 mol P2O3 * (141.94 g/mol P2O3) = 137.3 g P2O3
So, approximately 137.3 grams of P2O3 will form if one uses 78 grams of oxygen.
1) If an ideal gas has a pressure of 6.83 atm, a temperature of 475 K, and a volume of 60.47 L, how many moles of gas are in the sample?
2) Solid ammonium chloride, NH4Cl, is formed by the reaction of gaseous ammonia, NH3, and hydrogen chloride, HCl.
NH3(g)+HCl(g)⟶NH4Cl(s)
A 6.00 g sample of NH3 gas and a 6.00 g sample of HCl gas are mixed in a 2.00 L flask at 25 ∘C.
How many grams of NH4Cl will be formed by this reaction?
What is the molecular formula of a compound with the empirical formula NBH4
and a formula mass of 86.55 amu?
Answer:
Let us say that the molecular formula of the compound = (NBH4)n (where, n is an integer)
Atomic mass of N, B, and H are respectively 14.00 amu, 10.81 amu, and 1.008 amu.
Thus, the molar mass of (NBH4)n = n x (1 x 14.00 amu + 1 x 10.81 amu + 4 x 1.008 amu)
= 28.84n amu
Now,
28.84n amu = 86.55 amu
or, n = 3
Hence, the molecular formula of the compound = (NBH4)3 = N3B3H12
Explanation:
Consider the following reaction mechanism and its associated energy diagram:
S1: C₂H4 (g) + HBr(g) --> C₂H5+ + Br
S2:
C₂H5 + Br --> C₂H5Br (1)
Answer:
From the energy diagram, we can see that the reaction mechanism is an example of a two-step reaction. The first step (S1) involves the combination of ethylene (C₂H4) and hydrogen bromide (HBr) to form an ethyl cation (C₂H5+) and a bromide anion (Br). In the second step (S2), the ethyl cation and bromide anion combine to form ethyl bromide (C₂H5Br). The reaction is exergonic as evidenced by the fact that the activation energy, represented by the peak in the energy diagram, is negative. This indicates that the reaction releases energy.
Where do nitrogen in oxides of nitrogen come from
Completely classify liquid
Fe
.
In the titration of 25.00 mL of a water sample, it took 19.840 mL of 4.395x10-3 M EDTA solution to reach the endpoint.
Calculate the number of moles of EDTA required to titrate the water sample. (enter your answer with 3 significant figures)
The total hardness is due to one or a combination of Ca2+, Mg2+, and Fe2+ in your sample. It is convenient to express this hardness as though it was entirely due to Ca2+. Making this assumption, determine the number of moles of Ca2+ present in the bottled water sample titrated. (enter your answer with 3 significant figures)
The total hardness is always listed in parts-per-million (ppm) of CaCO3 (or mg CaCO3 / Kg H2O). Since the density of water is 1.0 g/mL, one ppm would be the same as the number of mg of CaCO3 per liter of water. Determine the number of moles of CaCO3 present in the titrated sample of water, assuming that all the Ca2+ combines with CO32−. (enter your answer with 3 significant figures)
Calculate the number of grams of CaCO3 present and convert to mg. (enter your answer with 3 significant figures)
The number of grams of CaCO3 present and converted to mg is 348.787 mg.
What is EDTA ?Ethylenediaminetetraacetic acid (EDTA) is an organic compound used in a variety of applications, including industrial, medical, and food-related. EDTA is a white, crystalline powder, and is often referred to as a chelating agent due to its ability to bind and sequester various metal ions. This property makes it useful in a wide range of industries, including food processing, water treatment, paper manufacturing, and metalworking. In the medical field, EDTA is used to treat heavy metal toxicity, as it has the capability to bind to the metal ions, rendering them harmless to the body. EDTA is also found in many food products, as it serves as a preservative and stabilizing agent.
we know that
moles = concentration x volume (ml) / 1000
so
moles of EDTA = 4.395 x 10-3 x 19.84 / 1000
moles of EDTA = 8.71968 x 10-5
now
moles of Ca+2 = moles of EDTA
so
moles of Ca+2 = 8.71968 x 10-5
now
Ca+2 + C032- ---> CaC03
so
moles of CaC03 = moles of Ca+2
so
moles of CaC03 = 8.71968 x 10-5
now
mass = moles x molar mass
molar mass of CaC03 = 100 g /mol
so
mass of CaC03 = 8.71968 x 10-5 x 100
mass of CaC03 = 8.71968 x 10-3 g
mass of CaC03= 8.71968 mg
now
volume of water = 25 ml = 25 x 10-3 L
so
ppm = 8.71968 / 25 x 10-3
ppm = 348.787
sp
ppm of CaC03 is 348.787
So, The number of grams of CaCO3 present and converted to mg is 348.787 mg.
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Which of the following statements about atoms and
subatomic particles is true?
A. The nucleus of an atom has no mass.
B. Neutrons are negatively charged.
C. Electrons exist in the nucleus.
D. The nucleus makes up most of the mass of an atom.
E. A cation has more electrons than protons.
Modify each incorrect statement to make it correct.
statements about atoms and subatomic particles is true A cation has more electrons than protons.
Why is it called a subatomic particle?Protons, neutrons and electrons are all called subatomic particles because they are smaller particles that make up atoms. The prefix "sub" means beneath, or smaller. Since these particles are "sub"-atomic, this means they are smaller than atoms. Atoms have a nucleus made of protons and neutrons stuck together.
What are subatomic made of?Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.
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The density of 70.5 wt% aqueous perchloric acid is 1.67 g/mL. a. How many grams of solution are in 1.000 L? b. How many grams of HClO4 are in 1.000 L? c. How many moles of HClO4 are in 1.000 L?
There would be 1670 g of solution in 1.000 L and 1,177.35 gram of HClO₄ are in 1.000 L. There are 11.72 moles of HClO₄ in 1 L.
There are 1000 mL in a liter, hence density indicates the amount of grams per mL.
Density =1.67 g / 1 mL = 1670 g / 1000 mL = 1670 g/ 1.0 L
so there would be 1670 g of solution in 1.000 L
We got aqueous perchloric acid 70.5 wt%, it means the amount of perchloric acid in 100 grams of solution is 70.5 grams. so mass of HClO₄ are in 1.000 L will be
mass of HClO₄ = 70.5% x1670 g/ 1.0 L = 1,177.35 gram
Moles of HClO₄ = mass / mass molar
Moles of HClO₄ = 1,177.35 gram/ 100.46 g/mol = 11.72 moles
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using reactions from this chapter as well as from the previous chapter, show how 1-hexanol can be converted into a grignard reagent.
In order to create the Grignard reagent from 1-hexanol, the matching halide must first be converted from it. You can accomplish this by reacting 1-Hexanol with a potent acid,
Like HCl. The appropriate alkyl chloride will be created during the reaction, and this alkyl chloride can then be combined with a primary alkyl halide, such as magnesium bromide, to create the Grignard reagent. The Grignard reagent will have the generic formula RMgX, where R is the alkyl group from 1-Hexanol and X is the halide. The reaction is normally carried out in an ether solvent. The synthesis of alcohols and other organic molecules can then be accomplished using the Grignard reagent.
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What is the weighted average length of the nails in the drawer?
A. 350 cm
B. 333 cm
C. 5.00 cm
D. 3.50 cm
The weighted average length of the nails in the drawer can be found to be D. 3. 50 CM.
How to find the weighted average ?Multiply each number by its weight, then add the results to determine the weighted average. Find the sum of all the variables multiplied by their weight, then divide by the sum of the weights if the weights don't add up to one.
In formula form, this is:
= ∑ ( Percentage of abundance x Length of nail )
The weighted average length of nails is:
= ( 2. 50 x 70. 5%) + ( 5. 00 x 19. 0 %) + ( 7. 50 x 10. 5 % )
= 3. 50 cm
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Which of the following actions are permitted in balancing a chemical equation? Select all that apply.Multiplying all coefficients by a common factor
Inserting coefficients in front of formulas of reactants and products
When balancing a chemical equation, it is permitted to multiply all coefficients by a common factor, as well as inserting coefficients in front of formulas of reactants and products.
Additionally, you can also add reactants or products, and raise the coefficients.
When balancing a chemical equation, it is important to consider the mole ratio, which is the ratio of the number of moles of each reactant to the number of moles of each product. To balance the equation, you need to adjust the coefficients of the reactants and products until the mole ratios are equal.
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in this pair, identify all the molecular forces present for each substance, and select the substance with higher boiling point: circle one which has higher boiling point (a) ch3br or ch3f (b) ch3ch2ch2oh or ch3ch2och3 (c) c2h6 or c3h8 (d) mgcl2 or pcl3 (e) ch3nh2 or ch3f (f) ch3oh or ch3ch2oh (g) ch3ch2ch2ch2ch2ch3 or 2,2-dimethylbutane
In the pair (a) CH3Br or CH3F, the dominant intermolecular forces in CH3Br are dipole-dipole forces, while CH3F has London dispersion forces. Therefore, CH3Br has the higher boiling point [1].
In the pair (b) CH3CH2CH2OH or CH3CH2OCH3, the dominant intermolecular forces in CH3CH2CH2OH are hydrogen bonds, while CH3CH2OCH3 has dipole-dipole forces. Therefore, CH3CH2CH2OH has the higher boiling point.
In the pair (c) C2H6 or C3H8, the dominant intermolecular forces in C2H6 and C3H8 are London dispersion forces. Therefore, C3H8 has the higher boiling point.
In the pair (d) MgCl2 or PCl3, the dominant intermolecular forces in MgCl2 and PCl3 are ionic bonds. Therefore, MgCl2 has the higher boiling point.
In the pair (e) CH3NH2 or CH3F, the dominant intermolecular forces in CH3NH2 are hydrogen bonds, while CH3F has London dispersion forces. Therefore, CH3NH2 has the higher boiling point.
In the pair (f) CH3OH or CH3CH2OH, the dominant intermolecular forces in CH3OH and CH3CH2OH are hydrogen bonds. Therefore, CH3OH has the higher boiling point.
In the pair (g) CH3CH2CH2CH2CH2CH3 or 2,2-dimethylbutane, the dominant intermolecular forces in both molecules are London dispersion forces. Therefore, CH3CH2CH2CH2CH2CH3 has the higher boiling point.
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Write the symbol for every chemical element that has atomic number greater than 6 and atomic mass less than 25.2 u.
Answer:
C, Carbon
Explanation:
Write the symbol for every chemical element that has atomic number greater than 6 and atomic mass less than 25.2 u.
classify each solid as a covalent, ionic, metallic, or molecular solid. drag the appropriate items to their respective bins. view available hint(s)for part a resethelp covalentdroppable ionicdroppable metallicdroppable moleculardroppable
The appropriate items to their respective bins are:
Covalent: Carbon dioxide
Ionic: Table salt
Metallic: Iron
Molecular: Sugar
What is bins?
Bins are containers used for storing and organizing items. They can be made from a variety of materials, including wood, metal, and plastic, and come in many shapes and sizes. Bins are often used in large warehouses, retail stores, and other business establishments to store and organize products, tools, and other items. In the home, bins can be used to store toys, shoes, and other items that need to be kept organized.
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The diagram below shows a stack of rock layers. These layers have not changed position since they formed.
The fossils in Layer 2 are younger than those in Layer __ and older than the fossils in Layer __
Answer: The fossils in Layer 2 are younger than those in Layer 1, and older than the fossils in layer 3. (assuming layer 1 is at the bottom, and layer 3 is at the top.)
Explanation: Think of how this stack of rocks formed. Layer 1 would have deposited first along with it's fossils, followed by 2, 3, etc. Layer 2's fossils would be younger than Layer 1, but older than Layer 3.
Ethanol, CH3CH2OH, is known as grain alcohol and is the alcohol found in alcoholic beverages. Calculate the mole fraction of ethanol in a solution that contains 4.76g of ethanol d
Answer:
Explanation:
To calculate the mole fraction of ethanol we need the number of moles of ethanol (n1) and the total number of moles of all solutes in the solution (n_total).
We know that molar mass of ethanol = 46.07 g/mol
First, we'll find the number of moles of ethanol:
n1 = mass / molar mass
n1 = 4.76 g / 46.07 g/mol
n1 = 0.1029 mol
Next, we'll find the total number of moles of all solutes in the solution:
n_total = n1
Finally, we'll use these values to find the mole fraction of ethanol:
mole fraction of ethanol = n1 / n_total
mole fraction of ethanol = 0.1029 mol / 0.1029 mol
mole fraction of ethanol = 1.00
Therefore, the mole fraction of ethanol in the solution is 1.00.
What would be the original Celsius temperature of a gas at a pressure of 4.5 atm if the temperature changes
to 110°C?
Please help I don’t understand thanks for your time if you solve this for me
The final temperature of the gas can be determined using Gay-Lussac's law. The temperature of the gas at 4.5 atm will be 66°C.
What is Gay- Lussacs law?According to Gay- Lussacs law at constant volume, the pressure of a gas is directly proportional to the temperature.
Hence, P/T = constant.
Let P1 and T1 be the initial pressure and temperature and P2, T2 be the final quantities, then
P1/T1 = P2/T2
Given P1 = 4.5 atm
T1 = ?
P2 = 7.5 atm
T2 = 110°C
Then T1 = P1 T2/P1
T1 = 4.5 atm ×110° C /7.5 atm
= 66°C
Therefore, the temperature of the gas at 4 .5 atm is 66°C.
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Your question is incomplete. But your complete question probably was:
What would be the original Celsius temperature of a gas at a pressure of 4.5 atm if the temperature changes to 110°C at 7.5 atm.
Calculate the molarity of a solution prepared by diluting 60.02 mL of a 0.574 M potassium chloride solution to 150.00 mL.
The molarity of the solution prepared by diluting 60.02 mL of a 0.574 M potassium chloride solution to 150.00 mL is 0.229 M.
The initial molarity of the potassium chloride, M₁ = 0.574 M
The initial volume potassium chloride , V₁ = 60.02 mL
The final molarity potassium chloride, M₂ = ?
The final volume potassium chloride, V₂ = 150 mL
The expression is as follows :
M₁ V₁ = M₂ V₂
M₂ = M₁ V₁ / V₂
M₂ = ( 0.574 × 60.02 ) / 150
M₂ = 0.229 M
The molarity of the solution is 0.229 M with the volume of the 150 mL.
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The volume of a sample of mercury was determined to be 13.77 cm³. What is the
volume of this sample reported in cubic inches?
The volume of the sample reported in cubic inches would be 0.84 [tex]in^3[/tex].
Unit conversionThe problem here has to do with converting from cm³ to [tex]in^3[/tex].
1 cm = 0.3937 inch
1 cm³ = 0.0610 [tex]in^3[/tex]
Thus, if
1 cm³ = 0.0610 [tex]in^3[/tex]
13.77 cm³ = 13.77 x 0.0610/1
= 0.84 [tex]in^3[/tex]
In other words, the volume of mercury determined to be 13.77 cm³ will be 0.83 reported in cubic inches.
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A student dissolves 15.g of styrenein (C8H8) in 250 mL of a solvent with a density of 0.88g/mL. The student notices that the volume of the solvent does not change when the styrene dissolves in it.Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits.
The molar mass of styrene (C8H8) is 104 g/mol, when a student dissolves 15.g of styrenein (C8H8) in 250 mL of a solvent with a density of 0.88g/mL.
To calculate the molarity of a solution, you must divide the number of moles of solute (styrene) by the volume (liters) of the solution: 1438 mol ÷ 0.
25 L = 0.5752 M = 0.58 M (rounded to two significant figures)
To calculate the molarity of a solution, divide the number of moles of solute by the mass of solvent in grams.
0.1438 mol ÷ 250 g = 0.0005752 mol/g = 0.
00058 mol/g (rounded to 2 significant figures
A student dissolved 15 g of styrene (C8H8) in 250 ml of solvent with a density of 0.88 g/ml. Styrene has a molar mass of 104 g/mol, so the number of moles of solute is 15 g ÷ 104 g/mol = 0.1438 mol The molarity of the solution is zero.
1438 mol ÷ 0.25 L = 0.58 M. Molarity is calculated as 0.1438 mol ÷ 250 g = 0.
00058 mol/g. Both molarity and molarity are measures of concentration and indicate the amount of solute in a solution.
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