CH4 (g) + O2 (g) → CO2 (g) + H2O (g) to. If 28.6 g of CH4 is reacted with 57.6 g of O2, calculate the number of grams of CO2 produced. b. If you actually get 32.1 g of CO2, calculate the percent yield. c. Calculate the number of moles of excess reagent remaining at the end of the reaction.
Answers
Answer:
See explanation
Explanation:
First we must obtain the limiting reactant. The equation of the reaction is;
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)
Number of moles of CH4= 28.6 g/16g/mol = 1.8 moles
Since the reaction is 1:1, 1.8 moles of CO2 was produced
Number of moles of O2 = 57.6 g/32 g/mol = 1.8 moles
2 moles of O2 produced 1 mole of CO2
1.8 moles of O2 produced 1.8 × 1/2 = 0.9 moles of CO2
Hence O2 is the limiting reactant
Mass of CO2 produced = 0.9 moles × 44 g/mol = 39.6 g
%yield = 32.1g/39.6 g × 100
%yield = 81.1%
According to the reaction equation;
2moles of O2 reacts with 1 mole of CH4
1.8 moles of O2 reacts with 1.8 × 1/2 =0.9 moles of CH4
Number of moles of CH4 left = 1.8 moles - 0.9 moles
Number of moles of CH4 left = 0.9 moles
Related Questions
Determine the isotope symbol that fits each description. a. 68 neutrons, 47 electrons b. mass number = 197, 79 electrons c. atomic number = 86, 136 neutrons d. atomic number = 76, mass number = 192
Answers
The isotope symbol that fits each description is as follows: 68 neutrons, 47 electrons is Ag b. mass number = 197, 79 electrons is Au c. atomic number = 86, 136 neutrons is Rn d. atomic number = 76, mass number = 192 is Os.
Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element but have distinct nucleon numbers (mass numbers) as a result of having a different number of neutrons in their nuclei. Although the chemical properties of each isotope of a given element are nearly identical, they differ in their atomic weights and physical characteristics.
The name "isotope" refers to the fact that different isotopes of the same element occupy the same location on the periodic table. The word "isotope" is derived from Greek origins that mean "the same place".
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One slice of bread provides you with 50 nutritional calories of energy. If a 1-1b loaf of bread contains 18
slices, how many Joules of energy are obtained by eating 1.00 g of bread? (1 nutritional calorie equals 1 kcal
and 1 cal = 4.18 J)
Answers
Given :
Energy in one slice of bread , e = 50 kcal .
A 1- lb loaf of bread contains 18 slices .
1 cal = 4.18 J .
To Find :
How many Joules of energy are obtained by eating 1.00 g of bread .
Solution :
We know , 1 lb = 0.45 kg = 450 g .
So , mass of 1 slice bread in gram is :
\(m=\dfrac{450}{18}\\\\m=25 \ g\)
So , 25 g bread contains 50 kcal of energy .
Energy in 1 g of bread is :
\(c=\dfrac{50}{25}\\\\c=2\ kcal\)
Therefore , energy in joules is \(2\times 4.18\ J=8.36\ J\) .
Hence , this is the required solution .
Two atoms of the same element cannot have different numbers of _____.
a. particles c. protons
b. neutrons d. electrons.
Answers
Different numbers of neutrons/ electrons would result in a charged elements (isotope)
Answer:
c. protons
Explanation:
A "proton" is a subatomic particle that is stable and is positively-charged. You will identify the number of protons that is present in the nucleus of a chemical element by its "atomic number." It gives us an identity of the element, therefore, every atom of the same element have the "same" number of protons. For example, the number of protons for "Hydrogen" is 1. This means that even if you have two atoms of Hydrogen, each of them has "1" as the number of proton.
What is the total pressure inside a flask that contains 2.15 atm helium, 4.62 atm xenon, and 0.65 atm argon?
Answers
Answer:
7.42 atm
Explanation:
The total pressure is just the sum of partial pressures:
2.15 + 4.62 + 0.65 = 7.42 atm
calcium carbonate is a common ingredient in antacids that reduces the discomfort associated with acidic stomach or heartburn. stomach acid is hydrocholoric acid, hcl. what volume in milliliters (ml) of an hcl solution with a ph of 1.51 can be neutralized by 14.0 mg of caco3? volume: ml if the stomach contains 13.0 ml of ph 1.51 solution, will all of the acid be neutralized? yes no what percentage of the acid is neutralized? if all of the acid is neutralized enter 100%. percentage neutralized:
Answers
The volume (ml) of HCl solution at pH 1.52 that can be neutralized with a given amount of CaCO₃ is 17.87 mL
We want to determine the volume of HCl that can be neutralized with a given amount of CaCO₃.
First we will write the chemical equation for the reaction i.e.
2HCl + CaCO₃ → CaCl2 + CO2 + H2O
This means that now 1 mole of CaCO₃, 2 moles of HCl are needed to neutralize.
Mass = 27.0 mg = 0.027 g Using the formula,
mol = mass / molar mass
∴ CaCO₃ mol present =
CaCO₃ mol present = 0.00026977 mol
Since 2 mol HCl is required, 2 mol HCl 70 mol CaCO₃ must be neutralized 20. of CaCO₃ 444 0.00053954 mol HCl
∴ CaCO₃ needs to be neutralized 0.00053954 mol HCl Now for the volume of HCl solution at pH 1.
52 required.
We will first determine the HCl concentration = 10^(-1.52)
[H⁺] = 0.
0302 M
∴ HCl concentration 0.0302 M
Now, for the volume using the formula,
Volume = mol/concentration
Required HCl Volume = 0.01787 L
Hence, the volume in milliliters (mL) of an HCl solution with a pH of 1.52 that can be neutralized by the given CaCO₃ is 17.87 mL.
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What is the sweetest-tasting simple carbohydrate in the diet?
a. glucose
b. lactose
c. fructose
d. sucrose
e. galactose
Answers
Compared to other common sugars, The sweetest-tasting simple carbohydrate in the diet is fructose
The sweetest-tasting simple carbohydrate in the diet?A naturally occurring sugar called fructose can be found in a variety of fruits, vegetables, and honey.
Compared to other common sugars like glucose and sucrose (table sugar), it is sweeter.
Fructose is quickly absorbed into the bloodstream after consumption and can serve as a quick source of energy.
Due to its extreme sweetness, it is frequently employed as a sweetener in many processed foods and beverages.
High-fructose corn syrup is a commercial sweetener with a considerable fructose content that is frequently used in sodas and other sweetened beverages.
Therefore, fructose is the sweetest simple carbohydrate.
Option C) fructose is the correct answer.
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What does the principle quantum number tell you?
What is the symbol we use for it?
What are shells?
Compare the energy in the 4th shell to that of the 3rd shell.
Answers
1) The energy level of the electron
2) The symbol is n
3) The shells correspond to the energy levels
4) The 4th shell has more energy than the 3rd shell
What is the quantum number?We know that the term quantum number has to do with the position of the electron in the atom. According to the Bohr model of the atom, the electrons that are found in the atom are said to have a specific energy and the electron can move from a lower to a higher energy level by the absorption of energy.
Given the fact that the principal quantum number can also be designated as energy levels or shells, we know that all the electrons that can be found in the atom are said to be classified into certain specific principal quantum levels.
Thus, when we have electrons in an atom, the most basic quantum number is the principal quantum number.
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Which of the following should you multiply by in order to solve the following: 43 m = ? ft
Answers
Answer:
3.28
Explanation:
At some point it is best to write out an equation to cancel out the units you don't want and to get to the units that you do want. So if you write this out in an equation, you can see how you get to the answer.
43 m 3.28 ft ? ft
-------- X ----------- = --------------
1 1 m 1
You can see now that the meters on the top will cancel out the meters on the bottom so all you are left with is the feet unit. When you write out the equation you put the unit on the bottom that you want to get rid of (meter). You put the unit you want to get to on the top which is feet. At this point you just have to know how many feet 1 meter is equal to and plug those number in. 1 meter is equal to 3.28 feet.
does anyone know how to do this thanks
Answers
Answer:
I don't know how to do this
sorry I can't able to help you
Explanation:
\(hii\)
have a nice day ✌️
Which method would you use to separate sand and salt and water?
Answers
Answer:
Filtration
Explanation:
Sand can be separated by filtration. Then, salt can be separated by evaporating the salt solution in water. Water can be recovered by condensation.
pls mrk me brainliest
Answer:
decantation and evaporation
Explanation:
The sun’s mass is about 30 million times greater than the moon. Why does the gravitational pull between Earth and the moon affect Earth’s tides more than the gravitational pull between Earth and the sun? a The moon is denser than the sun. b The moon is closer to Earth than the sun. c The moon has phases, but the sun does not. d The moon orbits Earth, but the sun does not.
Answers
Answer:
The moon is closer to earth
Explanation:
Around each new moon and full moon, the sun, Earth, and moon arrange themselves more or less along a line in space. Then the pull on the tides increases, because the gravity of the sun reinforces the moon's gravity. ... Thus, at new moon or full moon, the tide's range is at its maximum.
Determine if the following reaction is a redox reaction. Use evidence from the equation to explain your reasoning.
Answers
A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.
The following reaction is a redox reaction based on the following evidence: 2Al + 3FeO → Al2O3 + 3Fe2+ In this reaction, Fe is being reduced because the FeO is changing to Fe2+. Additionally, the Al is being oxidized because it is losing electrons and forming Al2O3. Therefore, the reaction is a redox reaction. Let us take a look at the oxidation state of the elements in the given equation. Oxidation state of Al: (2) for the reactant and (3+) for the product. Oxidation state of Fe: (2+) for the reactant and (2+) for the product. Oxidation state of O: (-2) for the reactant and (-2) for the product. We can tell that oxidation is happening because of the increase in the oxidation state of Al from 2 to 3+. We can tell that reduction is happening because of the decrease in the oxidation state of Fe from 2+ to 2. As a result, the given equation is a redox reaction.For such more question on oxidizes
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what happens if you don't disconnect the wires in a series circuit?
Answers
Answer:
the series circuit has one current so if you don't disconnect the wires nothing happens
but if you disconnect the wires in series circuit, the current stop and the current doesn't go to the end
Explanation:
(≧▽≦)hope it helps (≧▽≦)
Use the information given to calculate the average atomic mass of element Z. Z- 56 is 70% abundant and Z-59 is 30% abundant.
Answers
Answer:
56.9 amu
Explanation:
Depending on the number of isotopes an element has, the Average atomic mass of isotopes of an element can be calculated using:
(atomic mass of isotope1 × decimal abundance of isotope1) + (atomic mass of isotope2 × decimal abundance of isotope2)
According to this question, two isotopes of element Z were given
- Isotope Z- 56 with atomic mass 56 is 70% abundance. This means that its decimal abundance is 0.70
- Isotope Z- 59 with atomic mass 59 is 30% abundance. This means that its decimal abundance is 0.30
Therefore, average atomic mass of element Z is:
= (56 × 0.70) + (59 × 0.30)
= (39.2) + (17.7)
= 56.9
1.
Using the following equation: How many moles of lithium nitrate, LiNO3, will be needed to make 11. 4
moles of lithium sulfate, Li2SO4?
Pb(SO4)2
+
4 LINO3
→
Pb(NO3)2
+
2 Li2SO4
Answers
The number of moles of lithium nitrate, LiNO₃, needed to make 11.4 moles of lithium sulfate, Li₂SO₄, is 22.8 moles.
To find the moles of lithium nitrate, LiNO₃, needed to make 11.4 moles of lithium sulfate, Li₂SO₄, we will use the balanced chemical equation provided:
Pb(SO₄)₂ + 4 LiNO₃ → Pb(NO₃)₂ + 2 Li₂SO₄
From the equation, we can see that 4 moles of LiNO₃ are required to produce 2 moles of Li₂SO₄. To find the moles of LiNO₃ needed for 11.4 moles of Li₂SO₄, we can set up a proportion:
(4 moles LiNO₃ / 2 moles Li₂SO₄) = (x moles LiNO₃ / 11.4 moles Li₂SO₄)
Now, solve for x:
x = (4 moles LiNO₃ / 2 moles Li₂SO₄) * 11.4 moles Li₂SO₄
x = 22.8 moles LiNO₃
Therefore, 22.8 moles of lithium nitrate (LiNO₃) will be needed to make 11.4 moles of lithium sulfate (Li₂SO₄).
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What is theoretical yield in moles of oxygen when there are 18.3 moles of hydrogen ?
2H2 + O2 --> 2H2O
Answers
The theoretical yield of the water in the reaction is 329.4 g.
What is the theoretical yield?
We know that we can be able to obtain the theoretical yield when we look at the stoichiometry of the reaction that we have here. In this case, it is clear that would need to rely on the reaction equation and it would be our guide.
We have that;
2 moles of hydrogen would produce 2 moles of water
18.3 moles of hydrogen would also produce 18.2 moles of water.
Theoretical yield of water would now be;
18.3 * 18 g/mol
= 329.4 g
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Determine the required heat in BTU, for the water at 50 deg celcius
to become ice at -50 deg celcius.
4 decimals please. ty
Answers
The required heat in BTU, for the water at 50°C to become ice at -50°C is 209 BTU/lb.
To determine the required heat in BTU, for the water at 50°C to become ice at -50°C, we need to calculate the heat of fusion and the heat of cooling of water. We can use the following formula to calculate the required heat.
Q = mL
Where:Q is the required heat in BTU.
m is the mass of water in pounds.L is the specific heat of water at the desired temperature.
Lf is the heat of fusion of water.
Lc is the specific heat of ice.
Using the above formula, we get;
Q = mLf + mL + mLc
The heat of fusion of water is 144 BTU/lb
The specific heat of water at 50°C is 1.00 BTU/lb °F.
The specific heat of ice is 0.5 BTU/lb°F.
We know that: 1°C = 1.8°F.
So,50°C = 122°F and -50°C = -58°F
Also, the mass of water is not given, so let us assume that the mass of water is 1 lb.
Thus;
Q = mLf + mL + mLc
Q = 1(144) + 1(1.00)(122-32) + 1(0.5)(-50-0)
Q = 144 + 90 + (-25)
Q = 209 BTU/lb
Therefore, the required heat in BTU, for the water at 50°C to become ice at -50°C is 209 BTU/lb.
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when the exact composition and amounts of carbon and nitrogen in the media ingredients are unknown, these media are called?
Answers
When the exact composition and amounts of carbon and nitrogen in the media ingredients are unknown, these media are called complex media.
In microbiology and cell culture, media refers to the nutrient-rich solutions or mixtures used to support the growth and propagation of microorganisms or cells. These media typically contain various components such as carbon, nitrogen, minerals, vitamins, and other essential nutrients.
When the exact composition and amounts of carbon and nitrogen in the media ingredients are unknown, the media are referred to as complex media. Complex media are usually made from natural sources, such as yeast extract, beef extract, or peptone, which contain a mixture of nutrients in undefined proportions.
Complex media are commonly used in laboratory settings when the precise requirements of the microorganisms or cells being cultured are not well-defined or understood. They provide a broad range of nutrients that support the growth of a wide variety of organisms.
Contrastingly, defined or synthetic media have a precisely known composition, with the exact amounts and sources of carbon, nitrogen, and other nutrients specified. These media are used when researchers need precise control over the nutrients provided to the microorganisms or cells, allowing for specific growth conditions and experiments.
When the composition and amounts of carbon and nitrogen in the media ingredients are unknown, the media are called complex media. Complex media are used when the precise requirements of the microorganisms or cells are not well-defined, providing a mixture of nutrients that can support the growth of various organisms.
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25.0 mL of vinegar(acetic acid) was titrated with 1.5 M standardized NaOH.What is the concentration of the acetic acid in the vinegar if the equivalence point of titration required 8.2 ml of the 1.5 M NaOH titrant?
PLEASE HELP ASAP!
Answers
Based on the volume of NaOH required to reach the equivalence point, the concentration of the acetic acid in the vinegar at is 0.492 M.
What is the equivalence point of a titration?The equivalence point in a titration experiment is the point at which equal amounts of reactants have reacted.
At equivalence point, moles of vinegar = moles of NaOH
Moles of NaOH = concentration × volume
Moles of NaOH = 1.5 × 8.2 = 12.3 mmoles
Moles of vinegar = 12.3 mmoles
Concentration of vinegar = moles/volume
Concentration of vinegar = 12.3/25.0 = 0.492 M
Therefore, the concentration of the acetic acid in the vinegar is 0.492 M.
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Draw (on paper) a Lewis diagram for CH3CH2CH2OH.
Use your diagram to answer the following questions.
The number of C-H bonds =
The number of O-H bonds is
The number of C-C single bonds =
The number of C-O single bonds = =
The total number of lone pairs = =
Answers
Lewis diagram for CH3CH2CH2OH.
Lewis diagram for CH3CH2CH2OH
The number of C-H bonds=7
The number of O-H bonds=1
The number of C-C single bonds=2
The number of C-O single bonds=1
The total number of lone pairs=2 ( on O atom)
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lewis structure of CH3CH2CH2OH is
The number of C-H bonds = 7, The number of O-H bonds is 1, The number of C-C single bonds = 2, The number of C-O single bonds = 1, The total number of lone pairs = 2.
1-propanol, also known as propyl alcohol or n-propanol, is a primary alcohol with a molecular formula of C3H8O. It is a colorless liquid that is widely used as a solvent and a cleaning agent. It is also used in the production of acrylates and esters which are used in the manufacturing of various products such as paints, adhesives, and resins. It has a characteristic alcohol odor and is slightly less dense than water. Additionally, it has some medicinal applications, it is used as an antiseptic and disinfectant, it is also a central nervous system depressant, however, it should be handled with caution as it is flammable and can cause eye and skin irritation.
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Question 77
Individuals particularly susceptible to the toxic effects of cadmium are those who are deficient in:
a. phosphorous
b. zinc
c. potassium
d. iron
Answers
The correct answer is b. Zinc. Cadmium can bind with zinc and replace it in important enzymes and proteins, leading to cell damage and toxicity. Individuals who are deficient in zinc are more susceptible to the toxic effects of cadmium.
People who lack certain necessary minerals, such as calcium, zinc, and iron, are more vulnerable to the harmful effects of cadmium. These necessary minerals can be replaced by cadmium, which will interfere with regular cellular processes. Cadmium, for instance, can compete with calcium, which is necessary for healthy muscle and nerve function, and can result in neurological symptoms including convulsions, muscular weakness, and other neurological symptoms. In enzymes and proteins, cadmium may also replace zinc and iron, causing a variety of harmful consequences such as stunted growth and development, anaemia, and weakened immunological response. To reduce the hazardous consequences of cadmium exposure, it is crucial to maintain appropriate amounts of these vital minerals.
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Eggs turn into omelet physical or chemical
Answers
Identify the type of wave that would be located at Point A below.
Answers
Water 3.0 deals mainly with sewage treatment.
Describe which chemicals are currently not broken down by currently
used wastewater technologies and why that is important.
Answers
Water 3.0 deals mainly with sewage treatment. The primary aim of this project is to reduce the harmful impacts of chemical pollutants from industrial and agricultural activities on natural water resources.
Currently, used wastewater treatment technologies can break down some of the chemicals in wastewater but not all of them. Chemicals that are not broken down are referred to as persistent organic pollutants. These chemicals persist in the environment for long periods, and they can cause severe damage to aquatic life and human health.
Currently, the primary challenge facing water treatment technologies is the removal of persistent organic pollutants such as pesticides, pharmaceuticals, and endocrine-disrupting chemicals from wastewater.
These pollutants are generally water-soluble and resist microbial degradation, making them hard to remove from wastewater using current water treatment technologies. For example, conventional activated sludge treatment used in wastewater treatment plants does not remove some persistent organic pollutants from wastewater.
Failure to remove these pollutants from wastewater can have significant environmental and health impacts.
For example, pharmaceutical chemicals can cause antibiotic resistance, while endocrine-disrupting chemicals can cause birth defects, cancer, and other health problems.
Therefore, there is a need to improve wastewater treatment technologies to remove persistent organic pollutants from wastewater.
In conclusion, wastewater treatment technologies can break down some chemicals but not all. Chemicals that are not broken down are persistent organic pollutants and pose a significant risk to the environment and human health. Therefore, it is important to develop wastewater treatment technologies that can remove these pollutants from wastewater.
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an electrolysis cell with fe(no3)3 solution is operated for 2.0 hours at a constant current of 0.10 a. how much fe metal is plated out if the efficiency is 90%? (fe
Answers
0.12 g of Fe metal is plated out if the efficiency is 90% in the electrolysis.
Electrolysis is a process in which electrons are forced through a chemical cell causing a chemical reaction. It is the study of chemical processes that cause electrons to move. This movement of electrons is called electricity which can be generated by movements of electrons from one element to another in a reaction. This reaction is known as an oxidation-reduction reaction.
If an electrolysis cell with \(Fe(NO_{3}) _{3}\) solution is operated for 2.0 hours at a constant current of 0.10 A then,
= 0.10 (C / sec) × 2 × 3600sec
= 720C.
Efficiency = 720C. 1M / 96485C. 1mol Fe/ 3M . 55.8gFe / 1molFe . 0.90
= 0.12g of Fe.
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Select those that are misnamed. Check all that apply. 3,3-dichlorooctane 2,2-dimethyl-4-ethylheptane 3-propylbutane O 3,5-dimethylhexane isopentyl bromide 2,6-dibromohexane
Answers
Hello! Based on your question, the misnamed compounds are:
1. 3-propylbutane (correct name: 1-propylpentane)
2. isopentyl bromide (correct name: 1-bromo-3-methylbutane)
The other compounds are correctly named:
1. 3,3-dichlorooctane
2. 2,2-dimethyl-4-ethylheptane
3. 3,5-dimethylhexane
4. 2,6-dibromohexane
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A solution of hydrochloric acid was standardised by titration against a sodium carbonate solution using the following procedure.
- All glassware was rinsed correctly to remove possible contaminants
- Hydrochloric acid was placed in the burette
- 25.0 mL of sodium carbonate solution was pipetted into the conical flask.
The titration was performed and the hydrochloric acid was found to be 0.200 mol/L.
(a) Identify the substance used to rinse the conical flask and justify your answer.
Seashells contain a mixture of carbonate compounds. The standardised hydrochloric acid was used to determine the percentage by mass of carbonate in a seashell using the following procedure.
- A 0.145 g sample of the seashell was placed in a conical flask.
- 50.0 mL of the standardised hydrochloric acid was added to the conical flask.
- At the completion of the reaction, the mixture in the conical flask was titrated with 0.250 mol/L sodium hydroxide.
The volume of sodium hydroxide used in the titration was 29.5 mL.
(b) Calculate the percentage by mass of carbonate in the sample of the seashell.
Answers
Calcium carbonate, which weighs 5.5 grams, makes up around 95% of the dry eggshell. The average eggshell has traces of sodium, potassium, zinc, manganese, iron, and copper as well as roughly 3% phosphorus and 3% magnesium.
What is the percentage by mass?To calculate the percentage mass of carbonate ions in 1 g of cockle shells, multiply the mass of carbonate ions by the mass of the powdered shell by 100%.
The mass percent is the measure of how much solute is present in a solution relative to the total mass of the solution.
Calcium makes up 40% of calcium carbonate, with carbon making up 12% and oxygen making up 48%.
Therefore, To calculate the percentage, multiply the atomic mass of calcium by the atomic mass of CaCO3, then multiply that result by 100.
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Please help!!
All fake answers get reported immediately. Yes, I am a girl -_-
Answers
Answer:
1.)C₃H₈O
2)OH
3.)1-propanol
1.) C4H8O
2.) C2H6O or CH3CH2OH
3.)Ethanol
Explanation:
Hope this help
Predict the immediate effect of the following changes on the observed cell voltage, E.
H2(g) + PbCl2(s) <–> Pb(s) + 2HCl (aq)
Delta H standard rxn > 0
Match
a) Dissolve NaOH into solution
b) Increase the temperature
c) Increase the amount of PbCl2
d) Dilute the solution by adding H2O
i) Increased E
ii) Decreased E
iii) No change in E
Answers
Dissolve NaOH into the Solution will - Increased E
Increase the temperature - Increased E
Increase the amount of \(PbCl_{2}\) - No change in E
Dilute the solution by adding \(H_{2}O\) - Increased E
E= Voltage or the electromotive force generated in the cell
Dissolving NaOH will increase the conductivity and number of ions in the cell and Increases E . Adding water also increases the presence of hydrogen and hydroxide ions in the solution and Increases E.
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A solution of 7.50 mg of a small protein in 5.00 mL aqueous solution has an osmotic pressure of 7.650 torr at 23.1°C.
Answers
The molar mass of the small protein is 1.71 x 106 g/mol.
The solution contains 7.50 mg of a small protein in 5.00 mL of an aqueous solution. The osmotic pressure of the solution is measured at 7.650 torr at 23.1°C. To determine the molar mass of the small protein, the osmotic pressure of the solution must be calculated. The osmotic pressure can be determined by utilizing the equation πV = nRT where π is the osmotic pressure, V is the volume of the solution, n is the number of moles of solute, R is the gas constant, and T is the temperature in Kelvin. By rearranging the equation and solving for n, the number of moles can be calculated.
The molar mass can then be determined by dividing the mass of solute by the number of moles. n = πV / RTn = (7.650 torr) (0.00500 L) / [(0.08206 L atm / K mol) (23.1°C + 273.15 K)]n = 4.38 x 10-6 mol The molar mass of the small protein can be calculated using the formula M = m / n where M is the molar mass, m is the mass of the protein, and n is the number of moles. M = m / nM = (7.50 x 10-3 g) / (4.38 x 10-6 mol)M = 1.71 x 106 g/mol.
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