if 32.8 ml of a 0.162 m naoh solution is required to titrate 25.0 ml of a solution of h2so4, what is the molarity of the h2so4 solution?
Answers
To find the molarity of the H2SO4 solution, we need to use the balanced chemical equation for the reaction between NaOH and H2SO4:
2 NaOH + H2SO4 → Na2SO4 + 2 H2O
From the equation, we can see that 2 moles of NaOH react with 1 mole of H2SO4. Therefore, the moles of NaOH used in the titration can be calculated as follows:
moles of NaOH = volume of NaOH solution (in L) x molarity of NaOH solution
moles of NaOH = 32.8 ml x (0.162 mol/L) / 1000 ml/L
moles of NaOH = 0.0053096 mol
Since the stoichiometry of the reaction is 2:1 (NaOH:H2SO4), the moles of H2SO4 in the 25.0 ml solution can be calculated as:
moles of H2SO4 = 0.5 x moles of NaOH
moles of H2SO4 = 0.5 x 0.0053096 mol
moles of H2SO4 = 0.0026548 mol
Finally, we can calculate the molarity of the H2SO4 solution as follows:
molarity of H2SO4 = moles of H2SO4 / volume of H2SO4 solution (in L)
molarity of H2SO4 = 0.0026548 mol / 0.0250 L
molarity of H2SO4 = 0.106 m
Therefore, the molarity of the H2SO4 solution is 0.106 M.
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To solve this problem, we can use the following formula:
Molarity of acid x Volume of acid = Molarity of base x Volume of base
where the acid is H2SO4 and the base is NaOH.
First, we need to find the moles of NaOH used in the titration:
0.0328 L NaOH x 0.162 mol/L NaOH = 0.0053136 mol NaOH
Next, we can use the balanced chemical equation for the reaction between H2SO4 and NaOH:
H2SO4 + 2NaOH → Na2SO4 + 2H2O
From the equation, we can see that the molar ratio of H2SO4 to NaOH is 1:2. This means that the moles of H2SO4 used in the titration is half the moles of NaOH used:
0.0053136 mol NaOH ÷ 2 = 0.0026568 mol H2SO4
Finally, we can use the formula to find the molarity of the H2SO4 solution:
Molarity of H2SO4 = (Molarity of NaOH x Volume of NaOH) ÷ Volume of H2SO4
Molarity of H2SO4 = (0.162 mol/L x 0.0328 L) ÷ 0.0250 L
Molarity of H2SO4 = 0.2124 mol/L
Therefore, the molarity of the H2SO4 solution is 0.2124 mol/L.
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Related Questions
Evaluate each pair to determine which object has the greater thermal energy.
Answers
Answer: first option
Explanation:
Answer: the bowl
Explanation:took the test
Which atom gives up its electrons most easily?
Answers
Answer: Caesium
Explanation:
Caesium has the lowest ionization energy. With the lowest ionization energy, it is the one that will most easily give up electrons.
Answer: cesium
Explanation:(cs)
I need help answering these
Answers
U has a total of six electrons. This corresponds to carbon (C). A is the second most common element in the atmosphere.
How to explain the informationThe second most common element in the atmosphere is oxygen (O). E is a noble gas.
Noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Based on the given options, E could be xenon (Xe).
S is an alkali metal.
Alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Based on the given options, S could be sodium (Na).
O is a halogen.
Halogens include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Based on the given options, O could be bromine (Br).
O has an atomic number larger than V but smaller than W.
Based on the periodic table, the atomic number of oxygen (O) is 8, which is larger than the atomic number of vanadium (V) (23) and smaller than the atomic number of tungsten (W) (74).
The charge on an L ion is +2.
The charge of +2 indicates that L must lose two electrons to form the ion. Based on the given options, L could be calcium (Ca).
C has five electrons in its outer energy fever.
Carbon (C) has four valence electrons, not five. This contradicts the given statement, so we need to revisit the deductions.
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Answer is C usa test prep users.
The two main reasons why pharmaceuticals fail are:
1. they do not work
2. they are unsafe
Which of these would NOT be a constraint to creating and developing pharmaceuticals?
es )
A)
expensive
B)
takes a long time
o
computer simulations can be used to test drugs
D)
inability to use clinical trials for initial development
Answers
if mass increases what must happen to the force in order to achieve the same change in motion
Answers
Answer:
the force has to increase aswell
Explanation:
force and mass have a direct relationship meaning when one increases the other will. the heavier something is, the more force u have to put in order to get it to move!!
If the mass increases than the gravitational attraction between them increases as well as force also increases.
What is force?Force is defined as a push or pull on an object caused by its interaction with another thing.
It is a vector quantity, which implies it has both magnitude and direction.
There are basically five types of force
Gravitational forceElectric forceMagnetic forceNuclear forceFrictional forceForce can be expressed as
Force = mass x acceleration
With increases in mass the force will also increases and acceleration will also increases.
Thus, If the mass increases than the gravitational attraction between them increases as well as force also increases.
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1. Calculate the energy for each of the following (1 pt each): Show all your work(a) Joules needed to heat 83.5 g of water from 26.7 °C to 75 °C.
Answers
The question requires us to calculate the energy, in joules (J), necessary to heat 83.5g of water from 26.7 °C to 75°C.
The heat energy (Q) can be calculated from the mass of the sample (m), its specific heat capacity of the substance (C) and temperature variation (ΔT), as given by the following equation:
\(Q=m\times C\times\Delta T\)Since the question did not provide a value for the specific heat capacity of water, we'll adopt the value 4.182 J/g.°C. Applying the values provided by the question, we can calculate the heat energy as:
\(\begin{gathered} Q=m\times C\times\Delta T \\ Q=(83.5g)\times(4.182J/g\mathrm{}\degree C)\times(75-26.7)\degree C=(83.5g)\times(4.182J/g\degree C)\times(48.3\degree C) \\ Q=1.69\times10^4J \end{gathered}\)Therefore, the heat energy necessary to heat the amount of water given grom 26.7 to 75°C is 1.69 x 10^4 J (or 16900 J).
C time
2. An instrument used to measure force is
B. spring balance
A ruler
D) wind vane
C. thermometer
of ford
Answers
Answer:
B. Spring balance - a device used for measuring the weight or force of gravity acting on an object.
Explanation:
A Force is any interaction that changes the motion or position of an obkpjectbthatbit is interacting with. Whenever there is an interaction between two objects, there is a force exerted by each of the objects on one themselves.
Forces are generally divided into contact forces and non-contact over field forces.
In contact forces, the two objects physically in contact with each other. Examples of contact forces are push or pull forces, frictional forces, tensional forces, spring forces, etc.
Non-contact forces are forces in which the two objects interacting do no need to be physically in contact with one another. Examples include, gravitational forces, magnetic forces, electrical forces, etc.
Instruments used in measuring forces are known as force gauges.
From the instruments listed above:
A. A ruler is an instrument used in measuring length
B. Spring balance is a device used for measuring the weight or force of gravity acting on an object.
C. A thermometer is an instrument used in measuring temperature
D. A windbvane is an instrument used in measuring wind direction.
Can water stay liquid below zero degrees Celsius?
How bad of an alcoholic do you have to be to have your brain affected?
How does dissolving a salt molecule in water make its atoms ionize?
Answers
1. Can water stay liquid below zero degrees Celsius?
Yes, under certain conditions, water can remain liquid below zero degrees Celsius. This phenomenon is known as supercooling. Supercooling occurs when water is in a pure state and does not have any impurities or nucleation sites that can trigger the freezing process. When the water is supercooled, it remains a liquid despite being below its freezing point. However, any disturbance or introduction of an impurity can cause the supercooled water to rapidly freeze.
2. How bad of an alcoholic do you have to be to have your brain affected?
The effects of alcohol on the brain can vary depending on several factors, including the amount and frequency of alcohol consumption, individual tolerance, overall health, and genetic predisposition. Prolonged and excessive alcohol consumption can lead to various brain-related issues, such as:
- Cognitive impairment: Long-term heavy drinking can impair cognitive functions, including memory, attention, and problem-solving abilities.
- Wernicke-Korsakoff syndrome: This is a severe neurological disorder caused by a deficiency of thiamine (vitamin B1) often associated with alcohol abuse. It can lead to memory problems, confusion, coordination difficulties, and even permanent brain damage.
- Structural brain changes: Chronic alcohol abuse can lead to shrinkage of brain tissue, particularly in areas associated with memory and cognitive functions.
- Increased risk of mental health disorders: Alcohol abuse is associated with an increased risk of developing mental health conditions such as depression, anxiety disorders, and alcohol-induced psychosis.
It's important to note that the impact of alcohol on the brain can vary from person to person, and some individuals may be more susceptible to the negative effects of alcohol than others. It is always advisable to consume alcohol in moderation or, in some cases, avoid it altogether to maintain good brain health.
3. How does dissolving a salt molecule in water make its atoms ionize?
When a salt molecule, such as sodium chloride (NaCl), dissolves in water, its atoms or ions separate and become surrounded by water molecules. This process is known as ionization or dissociation. In the case of NaCl, the salt molecule consists of one sodium ion (Na+) and one chloride ion (Cl-).
When the salt is added to water, the positive hydrogen (H) end of the water molecule attracts the negatively charged chloride ion (Cl-), and the negative oxygen (O) end of the water molecule attracts the positively charged sodium ion (Na+). This attraction between the water molecules and the ions causes the salt molecule to break apart or ionize.
The resulting ions, Na+ and Cl-, become surrounded by water molecules, with the water's positive ends surrounding the chloride ions and the water's negative ends surrounding the sodium ions. This process is known as hydration or solvation, and it helps to stabilize the ions in the water solution.
So, in summary, dissolving a salt molecule in water allows its atoms to ionize as the water molecules surround and stabilize the separated positive and negative ions.
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♥️ \(\large{\textcolor{red}{\underline{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}\)
Explanation:
1.
If you apply enough pressure (making it hard for the water molecules to spread out into the solid structure), you can have liquid water several degrees below zero degrees Celsius.
2.
Alcohol interferes with the brain's communication pathways and can affect the way the brain looks and works. Alcohol makes it harder for the brain areas controlling balance, memory, speech, and judgment to do their jobs, resulting in a higher likelihood of injuries and other negative outcomes.
3.
Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by water molecules. Once this happens, the salt is dissolved, resulting in a homogeneous solution.
Exercise 5.101 The elemental mass percent composition of salicylic acid is 60.87% C. 4.38% H, and 34.75% Part A Determine the empirical formula of salicylic acid
Answers
The empirical formula of salicylic acid is C2H2O.
The empirical formula of a compound represents the simplest, most reduced ratio of atoms in the compound. To determine the empirical formula of salicylic acid, we need to convert the given mass percent composition of each element into moles and find the ratio of the elements.
Given the mass percent composition, we can assume a 100g sample of salicylic acid. This means that in a 100g sample, there would be 60.87g of carbon, 4.38g of hydrogen, and 34.75g of oxygen.
To find the moles of each element, we divide the given masses by their respective atomic masses:
Moles of carbon (C) = 60.87g / 12.01 g/mol = 5.07 mol
Moles of hydrogen (H) = 4.38g / 1.01 g/mol = 4.34 mol
Moles of oxygen (O) = 34.75g / 16.00 g/mol = 2.17 mol
Next, we divide each element's mole value by the smallest mole value (in this case, oxygen) to get the simplest ratio:
Carbon: 5.07 mol / 2.17 mol = 2.34
Hydrogen: 4.34 mol / 2.17 mol = 2.00
Oxygen: 2.17 mol / 2.17 mol = 1.00
The resulting ratios are approximately 2.34:2.00:1.00, or approximately 2:2:1.
Therefore, the empirical formula of salicylic acid is C2H2O.
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1. SEP Developing and Using Models Look at the data in the table. Construct a
graph of the atomic numbers versus melting point temperature. Plot each group
using a different color or symbol so that you can tell them apart. Remember to
assess the range of the data before deciding on the scale for each axis.
Answers
Answer: do you syill need help on it i am happy to help
Explanation: TELL ME
Under what conditions would pressure affect the reaction rate?
A. If the reaction requires the use of a catalyst
B. If the reaction takes place between a solid and a liquid
O c. If the reaction is between two liquids
D. If the reaction occurs in the gas phase
Answers
Answer: D. If the reaction occurs in the gas phase
Explanation:
Answer:
D is correct via A P e x
Explanation:
What is the direct function of the energy released
from the nuclear chain reaction in a nuclear power
plant?
O turning the blades of the turbine
O heating water to produce steam
O powering the condenser
O carrying electricity from the plant to
consumers
Answers
The direct function of the energy released from the nuclear chain reaction in a nuclear power plant is for heating water to produce steam.
Energy released in nuclear chain reaction
A chain reaction is type of reaction in which neutrons released in fission produce an additional fission in at least one further nucleus.
This type of reaction involves the release of energy. This energy or heat is used to make steam that spins a turbine to create electricity.
Thus, we can conclude that, the direct function of the energy released from the nuclear chain reaction in a nuclear power plant is for heating water to produce steam.
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A cell in your adrenal gland has about 2. 5 * 10^4 tiny compartments called vesicles that contain the hormone epinephrine (also called adrenaline). (a) An entire cell has about 150 fmol of epinephrine. How many attomoles (amol) of epinephrine are in each vesicle?
(b) How many molecules of epinephrine are in each vesicle?
(c) The volume of a sphere of radius r is r/3 πr^3. Find the volume of a spherical vesicle of radius 200 nm. Express your answer in cubic meters (m3 ) and liters, remembering that 1 L = 10^-3 m^3.
(d) Find the molar concentration of epinephrine in the vesicle if it contains 10 amol of epinephrine.
Answers
The values of all sub-parts have been obtained.
(a) The 6.04 amol/vescile of epinephrine are in each vesicle.
(b) The 3637892 molecules of epinephrine are in each vesicle.
(c) The volume of a spherical vesicle is V = 3.34 × 10⁻¹⁷ L.
(d) The concentration of epinephrine = 0.30 M.
What is molar concentration.
A chemical species' concentration, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The number of moles per litre, denoted by the unit sign mol/L or mol/dm3 in SI units, is the most often used molarity unit in chemistry.
(a) Evaluate that how many attomoles (amol) of epinephrine are in each vesicle?
As given,
1 fmol = 10⁻¹⁵ mol
1 amol = 10⁻¹⁸ mol
Number of attomoles epinephrine:
= 151 fmol × (10⁻¹⁵ mol)/ 1 fmol × 1amol/10⁻¹⁸ mol
= 151000 amol
Number of attomoles of epinephrine in each vescile:
= 151000 amol/2.5 × 10⁴ vescile
= 6.04 amol/vescile.
(b) Evaluate that how many molecules of epinephrine are in each vesicle?
Number of molecules present in 1 mol of epinephrine:
= 6.04/vescile × [(10⁻¹⁵ mol)/ 1 fmol] × [6.023 × 10²³ molecules/1 mol]
= 3637892
(c) Evaluate the volume of a spherical vesicle of radius 200 nm.
Radius of spherical vescile is 2.00 × 10⁻⁷ m
Volume of the spherical vescile is,
V = 4/3 πr³
Substitute value of r respectively,
V = 4/3 π(2.00 × 10⁻⁷ )³
V = 3.34 × 10⁻²⁰ m³
V = 3.34 × 10⁻¹⁷ L
(d) Evaluate the molar concentration of epinephrine in the vesicle if it contains 10 amol of epinephrine.
Number of moles epinephrine = 10 amol
= 1.00 × 10⁻¹⁷mol
Volume of the spherical vescile = 3.34 × 10⁻¹⁷ L
Concentration of epinephrine = (1.00 × 10⁻¹⁷mol)/(3.34 × 10⁻¹⁷ L)
Concentration of epinephrine = 0.30 M
Hence, the values of all sub-parts have been obtained.
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which indicator has to be used in order to get an emerald green color at a pH of 9?
a) universal indicator
b) methyl orange indicator
c) thymol blue indicator
d) cyanidin
Answers
Answer:
D) Cyanidin indicator
Explanation:
Cyanidin indicator has to be used in order to get an emerald green color at a pH of 9.
What is an indicator?Indicators are substances that change colour when they are added to acidic or alkaline solutions.
In nature, cyanidin is a reddish-purple (magenta) pigment. It is the major pigment in berries [4] and other red-coloured vegetables such as red sweet potato and purple corn. It appears as a blue-reddish or purple pigment in the plant.
Cyanidin indicator has to be used in order to get an emerald green colour at a pH of 9.
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an impure sample of hydrocarbon having a total mass of 39.1 g undergoes combustion analysis to generate 74.4 g co2(g) and 15.2 g h2o(g). assuming that the impurities do not contain carbon or hydrogen, what percentage of the initial sample is the pure hydrocarbon?
Answers
294.2% is the percentage of the initial sample of pure hydrocarbon from the given impure sample of a hydrocarbon having a total mass of 39.1 g.
The given data is as follows:
Total mass = 39.1 g
Carbon-di-oxide weight = 74.4 g
Hydrogen = 15.2g
The equation should be balanced for the combustion process and for equal reactants. The equation is:
CnHm + (n + m/4) O2 → n CO2 + m/2 H2O
Number of moles in CO2 = 74.4 g / 44.01 g/mol
Number of moles in CO2 = 1.688 mol
Number of moles in H2O = 15.2 g / 18.02 g/mol
Number of moles in H2O = 0.844 mol
Number of moles in hydrocarbon = 1.688 mol
The molar mass of Hydrocarbons is calculated by:
Molar mass of hydrocarbon mixture= (39.1 g - 1.688 mol x 44.01 g/mol - 0.844 mol x 18.02 g/mol) / 1.688 mol
The molar mass of the hydrocarbon mixture= 68.06 g/mol
The weight of Pure hydrocarbon is calculated by:
Weight of pure hydrocarbon = 1.688 mol x 68.06 g/mol
weight of pure hydrocarbon = 115.02 g
The percentage of the initial sample in pure hydrocarbon is calculated by the formula:
Percentage of pure hydrocarbon = (115.02 g / 39.1 g) x 100%
Percentage of pure hydrocarbon = 294.2%
Therefore we can conclude that 294.2% is the percentage of the initial sample is a pure hydrocarbon.
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Groups of atoms that align to form small, magnetized regions in a material are.
Answers
Answer:
Magnetic Domains
Explanation:
Each atom has its own magnetic field and if a group of atoms can align their magnetic fields this group is called a Magnetic Domain
Nuclear fusion involves atoms that collide to produce larger and heavier elements, whereas nuclear fission involves the splitting of
Answers
Nuclear fusion involves the combination of smaller atomic nuclei to form a heavier nucleus, while nuclear fission involves the splitting of a heavy nucleus into smaller nuclei.
Nuclear fusion occurs when two light nuclei, typically hydrogen isotopes like deuterium (²H) and tritium (³H), are brought together at extremely high temperatures and pressures to form a heavier nucleus. This process releases a large amount of energy in the form of heat and light. Fusion reactions are the energy source that powers stars, including our sun.
On the other hand, nuclear fission involves the splitting of a heavy nucleus, such as uranium-235 (²³⁵U), into two smaller nuclei, such as krypton-92 (⁹²Kr) and barium-141 (¹⁴¹Ba), along with the release of neutrons and a large amount of energy.
Fission is used in nuclear power plants to generate electricity, but it also produces radioactive waste that requires careful management.
While both fusion and fission release energy by altering the nucleus of an atom, they differ in the reactions that occur. Fusion releases energy by combining two light nuclei to form a heavier one, while fission releases energy by breaking apart a heavy nucleus into two lighter nuclei.
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Based on percent ionic character the bond between Al & Br would be classified as
A. ionic
B. polar
C. nonpolar
D. metallic
*************PLEASE HELPPPPPPPPP*********
Answers
Answer: I think it's A
Explanation:
explain why nickel is a good conductor of heat
Answers
Answer:
Its a good conductor because its a metal
Answer:
periodic table
Explanation:
in its magnetic properties and chemical activity it resembles iron and cobalt
A scientist mixes 0.02 g of a strong monoprotic base in 83ml of water and obtains a pH of 12 . He then realizes that he forgot to label the container and forgot what base he added. What is the most likely the identity of thisr base? LiOH NaOH RbOH KOH
Answers
A scientist mixes 0.02 g of a strong monoprotic base in 83ml of water and obtains a pH of 12 . The most likely the identity of this base is KOH.
Similar to monoprotic acids, monoprotic bases only have one equivalence point and can only react with one proton per molecule.
Since it completely dissociates into its constituent ions in its aqueous solution, potassium hydroxide, or KOH, is a strong basic. It is an inorganic substance that is frequently referred to as caustic potash. Due to its caustic nature and interactions with acids, it has a wide range of industrial applications.
There is no correlation between the quantity of acidic hydrogens in a molecule and their acidity (or specifically, how acidic the most acidic one is). Triprotic phosphoric acid is significantly weaker than monoprotic hydrochloric acid, whereas diprotic sulfuric acid is much stronger than hydrofluoric acid (monoprotic)
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RNA is a double strand. True or False?
Answers
Answer:
False, RNA is single stranded, DNA is double stranded and forms a double helix
Explanation:
Adding the reactants together is known as * (1 point) - Product - Compound - Precipitate - Reaction mixture Answer please. I really need it.
Answers
Answer:
Reaction Mixture
Explanation:
Using process of elimination;
Product
This is the substance formed as a result of a chemical reaction. Incorrect option
Compound
A substance formed when tow or more elements are chemically bonded together. Incorrect option.
Precipitate
Name given to an insoluble solid formed during a reaction. Incorrect option.
Reaction Mixture
Process of combing two or more substances to form a reaction. Correct option.
What is an allele?
a
A type of cell.
b
A blood type.
С
A type of mutation.
d
A variation of a gene.
Answers
Answer:
D. a variation of a gene
lithium (li) bonds with another atom to form a stable molecule with formula lix. based on groups in the periodic table, which atom could represent x?
Answers
Based on the groups in the periodic table, the atom that could represent "x" in the stable molecule LiX, where Li is lithium, would be any atom from Group 17, also known as the halogens.
The halogens include elements such as fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Lithium, being in Group 1, has a single valence electron that it can donate to another atom to form a stable molecule. The halogens in Group 17 have a valence electron deficiency of one, making them suitable candidates to accept the electron from lithium and form a stable LiX molecule.
Therefore, elements like fluorine (F), chlorine (Cl), bromine (Br), iodine (I), or astatine (At) could represent the atom "x" in the LiX molecule.
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How to round significant figures
Answers
Explanation:
To round to a significant figure:
look at the first non-zero digit if rounding to one significant figurelook at the digit after the first non-zero digit if rounding to two significant figuresdraw a vertical line after the place value digit that is requiredlook at the next digitif it's 5 or more, increase the previous digit by oneif it's 4 or less, keep the previous digit the samefill any spaces to the right of the line with zeros, stopping at the decimal point if there is oneHope it will help you.....Answer:look at the first non-zero digit if rounding to one significant figure.
look at the digit after the first non-zero digit if rounding to two significant figures.
draw a vertical line after the place value digit that is required.
look at the next digit.
Explanation: Google ;DDDD
a balloon containing 1,000L of gas at 50. C and 760 mmHg rises to an altitude where the pressure is 380mmHg and the temperature is 10. C, what is the new volume of the balloon (in L)?
Answers
Answer:
V' = 1.75 L
Explanation:
glitterfairy9870
6 hours ago
Chemistry
High School
a balloon containing 1,000L of gas at 50. C and 760 mmHg rises to an altitude where the pressure is 380mmHg and the temperature is 10. C, what is the new volume of the balloon (in L)?
PV/T =P'V'/T'
380 XFIRST, ALWAYS ALWAYS, ALWAYS CHANGE TEMP IN C TO TEMP IN K
50C =50+273K =323K
10C= 10+273 =283
now PV/T =P'V'/T')
so
760 X 1/323 = 380 X V'/283
so
V' =760 X1 X283/(323X380)
V' = 1.75 L
L
Which phrase is the best definition of matter?
A. The amount of physical material in an object
B. Anything that takes up space and has mass
C. Anything that can be measured
D. A particle made up of two or more atoms
SUE
Answers
The amount of physical material in an object
¿Qué fase de la materia se muestra en la imagen? *
Answers
solido
Explanation:
porque estan todos los puntos juntos
A gas occupies 1.00cm^3 at STP. What volume does it occupy at 710.0 mm Hg and 55.0°C
Answers
Answer:
Final volume is 1.29cm³
Explanation:
Using combined gas law:
P₁V₁/T₁ = P₂V₂/T₂
Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state of a gas.
We can solve the volume of the gas:
P₁ = 1atm at STP
V₁ = 1cm³
T₁ = 273.15K at STP
P₂ = 710mmHg * (1atm / 760mmHg) = 0.9342atm
V₂ = ?
T₂ = 55.0°C + 273.15K = 328.15K
Replacing:
1atm*1cm³/273.15K = 0.9342atm*V₂/328.15K
1.29cm³ = V₂
Final volume is 1.29cm³
94. 2 ml of 3. 8 Molar Rubidium Carbonate is mixed with 38. 2 ml of 5. O Molar Barium Acetate to form a precipitate:
1)Calculate the theoretical mass in grams of the precipitate using only the volume and molartity of the barium acetate
Answers
Given that the volume and molarity of barium acetate are 38.2 ml and 5.0 M, respectively. We need to find the theoretical mass in grams of the precipitate. Let's first write the balanced chemical equation for the reaction taking place: Rubidium Carbonate + Barium Acetate → Barium Carbonate + Rubidium AcetateRb2CO3(aq) + Ba(C2H3O2)2(aq) → BaCO3(s) + 2 RbC2H3O2(aq).
We can see that 1 mole of barium acetate reacts with 1 mole of barium carbonate. Hence, the molar ratio of barium acetate and barium carbonate is 1:1.Using the molarity and volume of barium acetate, we can find the moles of barium acetate as: Moles of barium acetate = Molarity × Volume in litres= 5.0 mol/L × (38.2/1000) L= 0.191 moles. Now, from the balanced chemical equation, we can see that 1 mole of barium carbonate is formed from 1 mole of barium acetate.
Therefore, the number of moles of barium carbonate formed will also be 0.191 moles. Now, let's calculate the mass of barium carbonate using its molar mass. Molar mass of BaCO3= (1 × atomic mass of Ba) + (1 × atomic mass of C) + (3 × atomic mass of O)= (1 × 137.33 g/mol) + (1 × 12.01 g/mol) + (3 × 16.00 g/mol)= 197.33 g/mol. Theoretical mass of BaCO3= Number of moles of BaCO3 × Molar mass of BaCO3= 0.191 mol × 197.33 g/mol= 37.7 g. Therefore, the theoretical mass of the precipitate is 37.7 g (approx) when only the volume and molarity of the barium acetate are taken into account. Note: In order to find the limiting reagent and the actual mass of the precipitate formed, we need to consider the volume and molarity of both the reactants.
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