10. calculate the mole fraction of h2so4 in 9.61 m h2so4. the density of the solution is 1.520 g/ml.
Answers
We must first determine the number of moles of H2SO4 contained in one litre of 9.61 M H2SO4 solution in order to compute the mole fraction of H2SO4.
The formula for calculating the amount of H2SO4 in the solution is:
Moles of H2SO4 are calculated as follows: 9.61 mol/L x (1000 mL / 1 L) = 9610 mmol; molarity of H2SO4 x volume of solution in litres
Calculating the solution's mass is the next step. To accomplish this, we can use the solution's density:
moles of all components = mass of solution / molecular weight of H2SO4 = 1520 g / 98.079 g/mol = 15.50 mol moles of H2SO4 / moles of all components = 9610 mmol / (15.50 mol x 1000 mmol/mol) = 0.620 mole fraction of H2SO4 = moles of H2SO4 / moles of all components = 9610 mmol
Hence, 0.620 moles of H2SO4 make up the solution.
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Related Questions
Characteristics of an atom
Answers
Answer:
It is composed of protons, which have a positive charge, and neutrons, which have no charge. Protons, neutrons, and the electrons surrounding them are long-lived particles present in all ordinary, naturally occurring atoms. Other subatomic particles may be found in association with these three types of particles.
Explanation:
Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
How many moles of AgNO3 are needed to prepare 452 mL of a 2.3 M solution?
Answers
Answer: To determine the number of moles of AgNO3 needed to prepare a 2.3 M solution in 452 mL, we can use the formula:
moles = concentration (M) x volume (L)
First, we need to convert the volume from milliliters to liters by dividing by 1000:
452 mL ÷ 1000 mL/L = 0.452 L
Next, we can plug in the values we know:
moles = 2.3 M x 0.452 L
moles = 1.0416
Therefore, we need 1.0416 moles of AgNO3 to prepare a 2.3 M solution in 452 mL.
How many molecules are in 4 moles of H2O
Answers
Answer:
2.41 x 10^24 molecules
Explanation:
How much energy does it take to boil 100 mL of water? (Refer to table of constants for water. )
A. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 6. 03 kJ/mol = 33. 5 kJ
B. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × (–285. 83 kJ)/mol = –1586 kJ
C. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 40. 65 kJ/mol = 226 kJ
D. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 4. 186 kJ/mol = 23. 2 kJ
Answers
Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.
The correct answer is D. 100 mL × 1g divided by 1mL × 1mol divided by 18.02g × 4.186 kJ/mol = 23.2 kJ
To calculate the energy required to boil 100 mL of water, we need to use the specific heat capacity of water, which is approximately 4.186 J/g·°C. The molar mass of water is 18.02 g/mol.
First, we convert the volume of water from milliliters to grams:
100 mL × 1 g/1 mL = 100 g
Then, we calculate the number of moles of water:
100 g × 1 mol/18.02 g = 5.548 mol
Finally, we multiply the number of moles by the molar heat of vaporization of water, which is approximately 40.65 kJ/mol:
5.548 mol × 4.186 kJ/mol = 23.2 kJ
Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.
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In a titration between sulfuric acid and sodium hydroxide, 25.0 mL of sulfuric acid requires 19.7 mL of 0.720 M NaOH to reach the titration endpoint.H2SO4 + 2NaOH ==> Na2SO4 + 2H2OWhat is the molarity of the sulfuric acid solution?
Answers
In a titration between sulfuric acid and sodium hydroxide, 25.0 mL of sulfuric acid requires 19.7 mL of 0.720 M NaOH to reach the titration endpoint.H2SO4 + 2NaOH ==> Na2SO4 + 2H2O. The molarity of the sulfuric acid solution is approximately 0.284 M.
To find the molarity of the sulfuric acid solution, we can use the balanced chemical equation and the volume and concentration of the sodium hydroxide solution used in the titration.
First, we need to determine the number of moles of sodium hydroxide used in the titration:
moles of NaOH = volume of NaOH x concentration of NaOH
moles of NaOH = 19.7 mL x 0.720 mol/L
moles of NaOH = 0.0142 mol
Next, we can use the balanced chemical equation to determine the number of moles of sulfuric acid that reacted with the sodium hydroxide:
1 mole of H2SO4 reacts with 2 moles of NaOH
moles of H2SO4 = 0.0142 mol x 1/2
moles of H2SO4 = 0.0071 mol
Finally, we can calculate the molarity of the sulfuric acid solution:
molarity of H2SO4 = moles of H2SO4 / volume of H2SO4
molarity of H2SO4 = 0.0071 mol / 25.0 mL
molarity of H2SO4 = 0.284 M
Therefore, the molarity of the sulfuric acid solution is 0.284 M.
In the given titration, 25.0 mL of sulfuric acid (H2SO4) reacts with 19.7 mL of 0.720 M sodium hydroxide (NaOH) to reach the endpoint. The balanced equation is:
H2SO4 + 2NaOH → Na2SO4 + 2H2O
To find the molarity of the sulfuric acid solution, we'll use the stoichiometry and the volume of NaOH solution used.
Moles of NaOH = Molarity of NaOH * Volume of NaOH
Moles of NaOH = 0.720 mol/L * 0.0197 L = 0.014184 mol
From the balanced equation, the mole ratio between NaOH and H2SO4 is 2:1. Therefore:
Moles of H2SO4 = Moles of NaOH / 2
Moles of H2SO4 = 0.014184 mol / 2 = 0.007092 mol
Now we can calculate the molarity of H2SO4:
Molarity of H2SO4 = Moles of H2SO4 / Volume of H2SO4
Molarity of H2SO4 = 0.007092 mol / 0.025 L = 0.28368 M
The molarity of the sulfuric acid solution is approximately 0.284 M.
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mercury thermometer should not be placed in the mouth of the children why?
Answers
Answer: If a pinch of mercury is consumed you will die from it so using a mercury thermometer is very unsafe if its breaks and a child consumes that mercury.
Explanation:
Don't use one
If the glass breaks and the mercury is not properly cleaned up, the little silvery ball within a mercury thermometer might be hazardous. As the mercury evaporates, it may pollute the air around and turn dangerous to both people and animals.
Children that have been exposed to mercury have lower IQs, hearing impairments, and worse coordination.
Long-term exposure worsens and exacerbates symptoms, which may lead to personality changes or even coma.
Mercury thermometers can be replaced by a number of things:
electronic thermometersGlass thermometers with gallium tinalcohol thermometers in glassThese non-mercury fever thermometers are significantly safer and equally accurate as mercury thermometers.
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Convert 3.5mol of CO2 to grams.
Answers
For weak acid, HX, Ka = 6.9 10-6. Calculate the pH of a 0.13 M solution of HX.
A) 0.89
B) 3.02
C) 6.05
D) 10.98
E) none of these
Answers
The pH of a 0.13 M solution of HX is 3.15.
None of the given options match the calculated pH value, so the correct answer is E) none of these.
How to calculate the pHTo calculate the pH of a weak acid, we need to use the acid dissociation constant (Ka) and the initial
To calculate the pH of a 0.13 M solution of a weak acid HX with Ka = 6.9 x 10⁻⁶, we can use the formula for Ka and the relationship between pH and the concentration of H⁺ ions.
Ka = [H⁺][X⁻]/[HX]
Let x be the concentration of H⁺ and X⁻ ions.
Since HX dissociates into H⁺ and X⁻, the equilibrium concentrations will be:
[H⁺] = x [X⁻] = x [HX] = 0.13 - x
Now, we can plug these values into the Ka equation:
6.9 x 10⁻⁶ = (x)(x)/(0.13 - x)
Assuming x is much smaller than 0.13 (due to the weak acid nature), we can simplify to:
6.9 x 10⁻⁶ ≈ x²/0.13
Solving for x (concentration of H⁺ ions):
x ≈ √(6.9 x 10⁻⁶ x 0.13) ≈ 7.11 x 10⁻⁴
Now, to find the pH:
pH = -log[H⁺] = -log(7.11 x 10⁻⁴) ≈ 3.15
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name the process Wich take place when .a solid carbon lv dry ice changes directly into gas
Answers
Answer:
evaporation takes place
Should Chaucer’s excessive praise of the Prioress be taken literally? Is he overstating her fastidious behavior in order to achieve some other effect?
Answers
Chaucer's excessive praise of the Prioress in his works, such as "The Canterbury Tales," may not be intended to be taken literally. It is possible that he is overstating her fastidious behavior to achieve a different effect or make a satirical commentary.
In Chaucer's "The Canterbury Tales," he often uses irony, satire, and humor to critique societal norms and individuals. While Chaucer's praise of the Prioress may seem excessive and laudatory, it is important to consider the larger context and Chaucer's intentions.
Chaucer's portrayal of the Prioress, with her delicate manners, elegant appearance, and refined behavior, may be seen as a satirical exaggeration or a critique of the hypocrisy and contradictions within religious institutions. By presenting an overly idealized and unrealistic depiction of the Prioress, Chaucer may be highlighting the contrast between her supposed piety and the actual principles she embodies.
Therefore, it is likely that Chaucer's excessive praise of the Prioress should not be taken at face value. Instead, it can be seen as a literary technique used to achieve a different effect, such as satire or social commentary, shedding light on the flawed nature of individuals or institutions in medieval society.
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What is an ecosystem. A.It is a single plant and a single animal that live in given area B. it is a community of plants, animals and their physical surrounding. C it is the members of the same species in an area. D it is one species that lives in a given area GIVE BRANLIYST
Answers
Answer:
B. it is a community of plants,animals and there physical surrounding.
FILL IN THE BLANK. there are ________ molecules of methane in 0.123 mol of methane (ch4).
Answers
0.123 mol of methane contains 7.4 x 1022 molecules of methane (ch4). Four hydrogen atoms are joined to the one carbon atom that makes up the molecule methane by single bonds.
It is a gas that is combustible, colourless, odourless, non-toxic, and has a melting point of -161°C. It serves as a fossil fuel, greenhouse gas, and bacterial metabolite, among other things. Avogadro's number refers to the fact that a mole of methane really consists of 6.0221023 molecules. To calculate the required number of molecules, find the substance's molecular weight for one mole. Next, multiply the result by the Avogadro constant after dividing the molar mass value by the molecular mass.
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what's the FM of chlorine
Answers
Answer:
The system can operate on a set level of parts per million (ppm) chlorine, where the set level is automatically maintained.
T/F Acidic rain, snow, fog, and cloud vapor typically has a pH of 5.6
Answers
The given statement " Acidic rain, snow, fog, and cloud vapor typically has a pH of 5.6" is false.
Acidic rain, snow, fog, and cloud vapor typically have a pH lower than 5.6. pH values below 5.6 indicate acidity. Acidic precipitation is caused by the presence of pollutants, such as sulfur dioxide (SO₂) and nitrogen oxides (NOₓ), in the atmosphere.
These pollutants react with water vapor and form sulfuric acid (H₂SO₄) and nitric acid (HNO₃), which lower the pH of the precipitation. The pH of acidic rain, snow, fog, and cloud vapor can vary, but it is usually in the range of 4 to 5.6 or even lower in heavily polluted areas.
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PLEASE HELP RN ITS URGENT
Answers
Answer: transporting oxygen-rich blood to the body
Explanation:
Which of these peptides is positively charged, which is
negatively charged, and which is neutral at physiological pH? What
is the charge on each peptide?
SDEKAINVKWQLA
SDEKAINVKWQHA
SEERAINVAWQHA
SDEK
Answers
This peptide is positively charged at physiological pH. In conclusion, SDEKAINVKWQLA and SDEKAINVKWQHA are neutral at physiological pH, SEERAINVAWQHA is negatively charged, and SDEK is positively charged.A peptide is a short chain of amino acids that are joined together with peptide bonds.
The nature of a peptide's charge depends on the overall charges of the amino acids in the sequence. At physiological pH, amino acids will either be positively charged, negatively charged, or neutral, depending on their side chains. Let's examine the peptides provided to determine their charges at physiological pH:SDEKAINVKWQLA: This peptide contains a mix of amino acids with positively charged, negatively charged, and neutral side chains. However, the positively charged amino acid (lysine) and the negatively charged amino acid (aspartic acid) are present in equal amounts.
Therefore, this peptide is considered neutral at physiological pH.SDEKAINVKWQHA: This peptide is similar to the first one but has one less amino acid (alanine instead of leucine at the end). It contains the same number of positively charged and negatively charged amino acids, and so it is also neutral at physiological pH.SEERAINVAWQHA: This peptide contains three negatively charged amino acids (aspartic acid and glutamic acid) and only one positively charged amino acid (lysine). Therefore, the peptide overall is negatively charged at physiological pH.SDEK: This peptide contains both positively charged (lysine) and negatively charged (aspartic acid) amino acids. However, there are more positively charged amino acids in the peptide than negatively charged ones.
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You recrystallize 2.1 g of an impure sample and recover 0.98 g. What is your percent recovery rounded to the tenths place
Answers
Answer:
c
Explanation:
The percent yield or percent recovery after recrystallization of the sample is 46.67%
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .
In the given example,percent yield or percent recovery is calculated as,
percent yield=recovered yield/recrystallized yield×100
=0.98/2.1×100=46.67%
Hence, the percent yield or recovery is 46.67%.
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Which object has the greatest K.E.?"
top of a hill
bottom of a hill
middle of a hill
Answers
Answer: the answer is A
Explanation:
The answers is A
At the bottom of the first hill, your kinetic energy is at its highest point.
Perform the following calculations and express the answers in
scientific notation.
a. 4.2 x 104 kg + 7.9 x 10³ kg
b. (5.23 x 106 um) (7.1 x 10-² μm)
c. 5.44 x 107 g + 8.1 x 104 mol
d. 8.40 x 105 km - 3.1 x 105 km
Answers
The answer of the calculations above in scientific notation are a=8.3 ×10³, b= 3.9 × 10^¹um, c= 1.4 × 10³gmol, d= 5.6× 10²km
Calculation to expressionsIn calculation of various expressions, the results can be expressed in a scientific notation which is a way to compress cumbersome figures.
(4.2 x 104 kg) + (7.9 x 10³ kg)4.2 × 104 = 436.8
7.9 × 10³ = 7900
436.8 + 7900 = 8,336.8
The scientific notation= 8.3 ×10³kg
(5.23 x 106 um) (7.1 x 10-² μm)5.23 x 106 um = 554.38um
554.38 × 7.1 = 3,936.1
3,936.1 × 10^-²
3.9 × 10³ × 10^-²= 3.9 × 10^¹um
The scientific notation= 3.9 × 10^¹um
5.44 x 107 g + 8.1 x 104 mol5.44 x 107 g = 582.08g
8.1 x 104 mol = 842.4 mol
582.08g+ 842.4 mol = 1,424.48
The scientific notation = 1.4 × 10³gmol
(8.40 x 105 km) - (3.1 x 105 km)8.40 x 105 km = 882km
3.1 × 105 = 325.5km
882km - 325.5km = 556.5
The scientific notation = 5.6× 10²km
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The chemical formula for hydrogen sulfide is H₂S. What is the mass of hydrogen in 150 g of
H₂S? (H = 1, S = 32)
Answers
The chemical formula for hydrogen sulfide is H₂S. The mass of hydrogen in 150 g of 141.2 g. Therefore, option A is correct.
What is mass ?A body's mass is an inherent quality. Prior to the discovery of the atom and particle physics, it was widely considered to be tied to the amount of matter in a physical body.
Simply put, mass is a measurement of a body's amount of matter. Matter is everything that has both volume and mass. Although mass cannot be seen, it can be measured or quantified. Not all matter is visible. Typically, mass is expressed in kilograms, etc.
Molar mass of H₂S
= 1 × 2 + 32
= 34
The mass of hydrogen in 150 g is 141.2 g.
Thus, option A is correct.
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Help ASAP need help and thank you:)
Answers
Answer:
50 N
Explanation:
Because It not in motion means it standing still. So the answer is 50 Newton
dilute hydrochloric acid+zinc metal
Answers
Explanation:
2HCl+2Zn----> 2ZnCl+H2
Explanation:
HCL + Zn= zncl2 + H2
plz mark my answer as brainlist if you find it useful.
Calculate the temperature when a 2.51L sample of gas at 25.0 °C is reduced to 1.75 L? (answer must be in K)
\Large \frac{V1}{T1}=\frac{V2}{T2}
Answers
Answer:
208 K
Explanation:
youre welcome
According to the Charle's law, when pressure is constant the temperature when a 2.51 L sample of gas at 25.0 °C is reduced to 1.75 L is 207.76 K.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.As per Charle's law substitution of values gives T₂=298×1.75/2.51=207.76 K.
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ΔH for the reaction below is -826.0 kJ/mol. Calculate the heat change when a 69.03-g sample of iron is reacted.4Fe(s) + 3 O2(g) --> Fe2O3(s)a. - 255.2 kJb. -510.5 kJc. -1020.9 kJd. -2042 kJe. -2.851 x 10^4 kJ
Answers
Answer:
c. -1020.9 kJ
Explanation:
4Fe (s) + 3 O₂ (g) --> 2 Fe₂O₃(s) ΔH = -826.0 kJ/mol.
atomic weight of iron = 56
69.03 g = 69.03 / 56
= 1.23268 moles
Heat released by 1.23268 moles
= 1.23268 x 826.0
= -1020.9 kJ .
Bicycles that have been left outside in the summer will rust faster than bicycles kept inside. What causes the bicycles that are left outside to rust faster?
Bikes that are kept outside are not used as often, speeding up the chemical reaction of metal rusting.
Heat energy from the sun slows down the chemical reaction of the metal rusting.
Moisture and oxygen cause oxidation, which speeds up the chemical reaction of the metal rusting.
Wind energy outside speeds up the chemical reaction of the metal rusting.
Answers
Bikes that are kept outside are not used as often, speeding up the chemical reaction of metal rusting.
Heat energy from the sun slows down the chemical reaction of the metal rusting.
Moisture and oxygen cause oxidation, which speeds up the chemical reaction of the metal rusting.
Wind energy outside speeds up the chemical reaction of the metal rusting.
PLEASE HELP: Explain why most substances are carbon compounds?
Answers
Answer:
The reason is carbon's ability to form stable bonds with many elements, including itself.
Explanation:
This property allows carbon to form a huge variety of very large and complex molecules. In fact, there are nearly 10 million carbon-based compounds in living things!
Answer:
Explanation:
The reason is that carbon is able to form stable bonds with many elements, including itself, which allows carbon to form a huge variety of very large and complex molecules.
Which of the following liquids is most volatile? Select one: a. cooking oil b. motor oil c. alcohol d. water
Answers
Answer:
Alcohol.
Explanation:
It has the lowest boiling point and high vapour pressure.
A substance has a volume of 20 mL and a density of 2.5 g/mL. What is its mass?
Answers
Answer:
mass = 50 gExplanation:
Density of a substance can be found by using the formula
\(Density(\rho) = \frac{mass}{volume} \)
From the question
Density = 2.5 g/mL
volume = 20 mL
To find the mass substitute the values into the above formula and solve for the mass
That's
Making mass the subject we have
mass = Density × volume
mass = 2.5 × 20
We have the final answer as
mass = 50 gHope this helps you
Answer:
mass=?,volume=20,density=2.5.
density=mass/volume.
which will be 2.5=mass/20
which is mass=2.5×20=50kg
How many protons, neutrons, and electrons are found in an isotope of the following:
Isotope
Atomic
Number
Mass
Number
Number of
protons
Number of
neutrons
Number of
electrons
195
78
78 protons, 78 neutrons, 78 electrons
117 protons, 195 neutrons, 78 electrons
78 protons, 195 neutrons, 78 electrons
78 protons, 117 neutrons, 78
Answers
Answer:
there are 92 protons and 92 electrons therefore, 238-92=146(neutrons)
Answer:atomic number 9, mass number 18, and change - 1
Explanation:
How does a scientist make two solutions with the same molarity?
O A. By dissolving the same number of moles of each substance in the
same volume of water
B. By dissolving the same number of grams of each substance in the
same volume of water
C. By dissolving the maximum amount of each substance in the
same volume of water
D. By dissolving 1 mole of each substance in enough water to make
sure dissolving is complete
Answers
Answer:
a
Explanation:
It's a duh