The nuclear reaction entails the breakdown of an element and the subsequent release of radioactive particles. This process can occur naturally or be produced purposefully. As a result, the reaction equation is balanced. The radon element is transmuted into polonium and an alpha particle in the provided question. Since an alpha particle was emitted, the equation is balanced.
Answers
The alpha decay of radon is shown by;
222/86Rn ----> 218/84Po + 4/2He
What is the alpha decay of radon?Radon undergoes alpha decay by emitting an alpha particle, which consists of two protons and two neutrons.
Let us note that when there is an alpha decay, the parent nucleus would loose a helium nucleus and the daughter nucleus would less than than the parent in mass by four units and less than the parent in charge by 2 units and this would satisfy the mass and charge balance of the equation. The decay equation is; 222/86Rn ----> 218/84Po + 4/2He
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Missing parts;
Use the equation to complete the activity.
219 86Rn → 215 84Po + a
The nuclear equation shows the transmutation of a form of radon into polonium and an alpha particle. In one to two sentences, explain whether or not the reaction is balanced.
Related Questions
How many ug of nickel (Ni) are required to make 25.00 nanoliters of a 1.25 mol/L solution? Be sure to report your answer to the correct number of significant figures.
Answers
volume of Ni = 25 nL = 25 x 10⁻⁹ L
mol Ni = 25 x 10⁻⁹ L x 1.25 mol/L = 3.125 x 10⁻⁸
mass = mol x Ar Ni
mass = 3.125 x 10⁻⁸ x 59 g/mol
mass = 1.84 x 10⁻⁶ g = 1.84 μg
Answer:
Explanation:
"25.00 nanoliters of a 1.25 mol/L solution" contains
25.00*10^(-9) L * 1.25 mol/L
= 31.25*10^(-9) mol of Ni
Molar mass of Ni is 58.69 g/mol
So 31.25*10^(-9) mol of Ni
= 31.25*10^(-9) * 58.69 g
= 1834.06*10(-9) g
= 1.834*10(-6) g
= 1.834 ug of Ni
experimental evidence indicates that the nucleus of an atom
Answers
The nucleus of an atom is positively charged and contains most of the mass if the atom.
What is an atom?An atom is the smallest particle of a an element that can take part in a chemical reaction.
Atoms are made up of other smaller sub-particles which are:
neutrons which are neutral protons which are positively charged electrons which are negatively chargedThe protons and neutrons are found in the nucleus of an atom
The electrons are found regions around the nucleus.
Due to the positive charge of the protons, the nucleus of an atom are positively charged and is massive.
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There are three types
of atoms, which on gains and looses electrons?
Answers
Answer:
https://courses.lumenlearning.com/boundless-biology/chapter/atoms-isotopes-ions-and-molecules/
Explanation:
1. in this experiment, why 3-sulfolene was used instead of 1,3-butadiene? explain thoroughly for full credit.
Answers
Starting with solid 3-sulfolene and then breaking it down was simpler than doing it with gaseous 1,3-butadiene. Maleic anhydride, a dienophile, reacts with the diene to produce 4-cyclohexene-cis-dicarboxylic anhydride.
What is sulfolene ?A cyclic organic compound with a sulfone functional group is known as sulfolene or butadiene sulfone. It is a crystalline, odorless, white solid that can be stored forever and dissolves in various organic solvents as well as water. The substance is utilized as a butadiene source.
Sulfolane is a common industrial solvent that is used for cleaning natural gas and extracting aromatic hydrocarbons from hydrocarbon mixtures.
Sulfolane, a dipolar aprotic sulfone solvent, is comparable in physicochemical qualities to other dipolar aprotic solvents as DMSO, NMP, DMF, and DMAC. Sulfolane (anhydrous) has the highest freezing point and highest boiling point among the solvents in Table 1 at 28.4 °C.
Thus, solid 3-sulfolene and then breaking it down was simpler than doing it with gaseous 1,3-butadiene.
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Insert the term that correctly completes the paragraph.
Illustration of a rock showing that the layers are not stacked horizontally and look like a rainbow of layers.
Soledad studied rocks and how they help show the history of Earth. She knew that scientists use different ways to find out how old rock layers are and recognized one such example in the rock in the image. The image is an example of a/an
rock.
Answers
Gravity causes spacecraft such as stars, planets, moons, and other bodies to orbit one another. Revolution describes this style of movement.
What is Gravity ?Gravity causes spacecraft such as stars, planets, moons, and other bodies to orbit one another. Revolution describes this style of movement. Space is also home to several stationary things. Rotation describes this movement.We experience day and night because of how long it takes the Earth to complete one rotation. A year is the length of one Earth rotation around the sun. Due to their varying rates of rotation and revolving, other planets have days and years that differ from our own.In the same direction, every planet in our solar system orbits the sun. In addition, the majority of them rotate in the same direction (with the exception of Venus and Uranus). In the cosmos, approximately half of all galaxies rotate in a clockwise direction, and the other half in a counterclockwise direction. This may be due to the manner that the cosmos started, according to scientists.To Learn more About Gravity refer To:
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what is a respiration?
Answers
Answer:
Respiration is the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells)
Explanation:
In physiology, respiration is the movement of oxygen from the outside environment to the cells within tissues, and the transport of carbon dioxide in the opposite direction.
Concentrated sufuric acid has a concentration of 18.4 M. 1 mL of concentrated sulfuric acid is added to 99 mL of a solution containing 0.505M*H_{2}*S and 0.505 M HS what is the resulting pH of that solution?
Answers
The resulting pH of the solution is 1.74(approx).
To solve this problem, we need to use the concept of acid-base equilibrium and the pH scale. The addition of sulfuric acid will increase the concentration of H+ ions in the solution, which will shift the equilibrium of the \(H_2S\)/HS- system. We can use the following equation to calculate the pH of the resulting solution:
Ka = [H+][HS-]/\(H_2S\)]
where Ka is the acid dissociation constant for \(H_2S\), [\(H_2S\)], [HS-], and [H+] are the concentrations of the \(H_2S\), HS-, and H+ ions, respectively.
First, we need to calculate the initial concentrations of\(H_2S\) and HS- in the solution:
[\(H_2S\)] = 0.505 M
[HS-] = 0.505 M
Next, we need to calculate the amount of H+ ions added to the solution by 1 mL of concentrated sulfuric acid. To do this, we can use the following equation:
[H+] = (n/V) = (18.4 mol/L) x (1x\(10^{-3}\) L) = 1.84 x\(10^{-2}\)mol
where n is the amount of sulfuric acid added in moles, V is the volume of the solution in liters, and 18.4 mol/L is the concentration of the sulfuric acid.
Now, we can calculate the new concentrations of \(H_2S\), HS-, and H+ ions in the solution:
[\(H_2S\)] = [\(H_2S\)]0 - [H+] = 0.505 - 1.84x\(10^{-2}\)= 0.486 M
[HS-] = [HS-]0 + [H+] = 0.505 + 1.84x\(10^{-2}\) = 0.524 M
[H+] = 1.84 x \(10^{-2}\)M
Finally, we can use the equation for Ka to calculate the pH of the resulting solution:
Ka = 1.1 x \(10^{-7}\)
[H+] x [HS-]/[\(H_2S\)] = Ka
pH = -log[H+]
Substituting the values, we get:
(1.84 x \(10^{-2}\)) x (0.524)/(0.486) = 1.98 x \(10^{-2}\)
pH = -log(1.98 x \(10^{-2}\)) = 1.74(approx)
Therefore, the resulting pH of the solution is 1.74(approx)
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There are three sets of sketches below, showing the same pure molecular compound (hydrogen chloride, molecular formula HCl) at three different temperatures. The sketches are drawn as if a sample of hydrogen chloride were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of HCl: -114.8 °C boiling point of HCl: -85.1 °C C A DODODODO 5 3. C -124. "C -105. C ? X
Answers
As per the temperature, the molecules of a substance act differently. The melting point is -114.2 °C and The boiling point of hydrogen chloride (HCl) is -85.05 °C. The correct sketch in each set is as follows:
Thus, if the temperature is kept above -85.05 °C, the molecules will be placed widely apart and will be in the gaseous state, revealing their properties.
If the temperature is between -114.2 °C and -85.05 °C, the molecules will be organized in layers capable of slipping over one another since they will be in a liquid state.
At last, the molecules will be arranged in an orderly manner because they will be in a solid state if the temperature is below -114.2 °C.
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What type of compound is represented by the graph at right? A. strong base B. strong acid C. weak base D. weak acid
Answers
The type of compound represented by the graph at right is a strong acid (option B).
What is a strong acid?An acid is generally any compound capable of dissociating into its respective constituent ions when in an aqueous solution.
An acid is categorised as strong or weak depending on whether it can dissociate completely or partially. A strong acid dissociates completely in water.
According to this question, HA, when added to water, dissociates into H+ and A- ions, hence, is a strong acid.
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Find the volume of 0.7 mol of butane gas at STP.
Answers
STP stands for Standard Temperature and Pressure, so a gas in STP conditions are at a set of Temperature and Pressure that are standardized.
The STP are standards, so they can change. The STP changed years ago, but sometimes the old STP are used.
The old STP conditions were defined as 1 atm pressure and 273.15 K temperature. In such conditions, 1 mol of gas (assuming ideal gas) oocupies approximately 22.4 L.
The currect STP conditions are 1 bas pressure and 273.15 K temperature. In such conditions, 1 mol of gas (assuming ideal gas) occupies approximately 22.7 L.
Since we have options, we can test which STP the question is using.
We can do this as a rule of three.
Using the old STP, we have:
Volume ---- Number of moles
V ---- 0.7 mol
22.4 L ---- 1.0 mol
\(\begin{gathered} \frac{V}{22.4L}=\frac{0.7}{1} \\ V=0.7\cdot22.4L \\ V=15.68L \end{gathered}\)Using the new STP, we would have:
Volume ---- Number of moles
V ---- 0.7 mol
22.7 L ---- 1.0 mol
\(\begin{gathered} \frac{V}{22.7L}=\frac{0.7}{1} \\ V=0.7\cdot22.7L \\ V=15.89L \end{gathered}\)As we can see, although the correct STP to use currenctly is the second one, we only have answer for the old STP.
So, the correct option in this question is 15.68 L (using the old STP).
The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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What changes sodium pellets to liquid
Answers
Answer:
when placed in water, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms. chemical change = fire is a sign of chemical reaction.
Explanation:
When placed in water the sodium pellets catch the fire and liberate the hydrogen gas. On mixing with water solid sodium forms a colorless basic solution.
What are the properties of sodium?Sodium is a soft metal. It is a very reactive element with a low melting point. Sodium reacts very quickly with water, snow, and ice to produce sodium hydroxide and hydrogen. It is an alkali metal and the sixth most abundant metal on earth. It has a silvery white color.
It has a strong metallic luster. On reacting with oxygen it produces sodium oxide which on reacting with the water produces sodium hydroxide.
It is used to improve the structure of certain alloys and soaps. It is also used in the purification of metals. Sodium is also present in sodium chloride, an important compound found in the environment.
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how many atoms are in 5.7 g of helium?
Answers
Answer:
3.5*1024
Explanation:
3584
water can be made using the reversible reaction shown, which change would kee
p this reaction from shifting to form more of the product?
Answers
We can produce more products by;
A. Increasing the concentration of H₂ gas in the reaction vessel
B. Decreasing the temperature in the reaction vessel
C. Removing the H₂O from the reaction vessel as it forms
Is formation of water an exothermic reaction?
Water is created through an exothermic process. Heat energy is released when hydrogen gas (H2) and oxygen gas (O2) mix to make water (H2O). An exothermic reaction is characterized by this energy release.
The reaction's overall energy change is negative, which shows that energy is released. The reaction is exothermic because the extra energy is released as heat into the environment.
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Missing parts;
Water can be made using the reversible reaction shown. Which change would
keep this reaction from shifting to form more of the product?
2H₂+022H₂O + energy
A. Increasing the concentration of H₂ gas in the reaction vessel
B. Decreasing the temperature in the reaction vessel
C. Removing the H₂O from the reaction vessel as it forms
D. Increasing the temperature in the reaction vessel
How many grams of sodium hydroxide are needed to completely react with 50.0 grams of H2SO4?
Answers
Answer:
48.0 grams
Explanation:
The products of this reaction are nitrogen gas and water. How many grams of sodium hydroxide (NaOH) are needed to completely react with 50.0 grams of sulfuric acid (H2SO4) to form sodium sulfate (Na2SO4) and water? 2NaOH + H2SO4 → Na2SO4 + 2H2O ; 48.0 grams of NaOH are needed.
51.020 grams of sodium hydroxide is needed to completely react with 50 grams of sulfuric acid according to stoichiometry.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
The reaction between sodium hydroxide and sulfuric acid is as follows,
2 NaOH + H₂SO₄\(\rightarrow\)Na₂SO₄+2 H₂O
From the reaction, it is clear that 2 oles of sodium hydroxide react with 1 mole of sulfuric acid to give products. According to molar mass concept,
100 g of sodium hydroxide gives 98 g of sulfuric acid
Therefore, 50 gram of sulfuric acid requires 50×100/98=51.020 g
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Which of the following produces identical nuclei in cells? A pollination B miltosis C osmosis D fertilization
Answers
Answer:
Mitosis.
Explanation:
During mitosis, two nuclei must form, so that one nucleus can be in each of the new cells after the cell divides. In order to create two identical nuclei, the DNA inside of the nucleus must be copied or replicated.
Which of the following describes an atom?
A. smallish units of two hydrogen joined together
B. 6 protons six neutrons in the nucleus and six electrons in the electron cloud
C. hydrogen chemically combined with an oxygen
D. 6 protons 6 neutrons in the nucleus and seven electrons in the electron cloud
Answers
Answer:
Correct answer is option (3) .
Explanation:
Hope it helpful....
How many moles of
Cts are needed to make
15.5 moles of CO₂? How
much O2 will be needed?
0₂
C₂Hs +50₂3CO₂ + 4H₂O
Answers
1. The number of mole of C₃H₈ needed to make 15.5 moles of CO₂ is 5.2 moles
2. The number of moles of O₂ needed is 25.8 moles
1. How do I determine the number of mole of C₃H₈ needed?The number of mole of C₃H₈ needed can be obtained as illustrasted below:
C₃H₈ + 5O₂ -> 3CO₂ + 4H₂O
From the balanced equation above,
3 moles of CO₂ was obtained from 1 mole of C₃H₈
Therefore,
15.5 moles of CO₂ will be obtain from = (15.5 × 1) / 3 = 5.2 moles of C₃H₈
Thus, number of mole of C₃H₈ needed is 5.2 moles
2. How do I determine the number of mole of O₂ needed?We can obtain the number of mole of O₂ needed as follow:
C₃H₈ + 5O₂ -> 3CO₂ + 4H₂O
From the balanced equation above,
3 moles of CO₂ was obtained from 5 moles of O₂
Therefore,
15.5 moles of CO₂ will be obtain from = (15.5 × 5) / 3 = 25.8 moles of O₂
Thus, number of mole of O₂ needed is 25.8 moles
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Complete question:
How many moles of C₃H₈ are needed to make
15.5 moles of CO₂? How much O₂ will be needed?
C₃H₈ + 5O₂ -> 3CO₂ + 4H₂O
Can someone do this for me!!????PLEASEEEE
Answers
Answer:
no that's worth points
Explanation:
Alkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism
Answers
Answer:
See explanation and image attached
Explanation:
According to Markovnikov regiochemistry, the negative part of the addendum is joined to the more substituted carbon atom. The addition of H-OH to alkynes occurs in the presence of mercury(II) sulfate as a Lewis acid catalyst.
So, the -OH group is added to the highly substituted carbon and the H adds to the less highly substituted carbon.
The enol produced is shown in the mechanism attached to this answer. Rearrangement of this enol form due to keto-enol tautomerism yields the ketone as shown.
Image credit: chemistry steps
why is glucose a macromolecule?
Answers
Answer:
Sugar
Explanation:
Glucose is a carbohydrate. Carbohydrates are mainly used for quick energy inside cells, but they also play an important role in cell structure and communication. Carbohydrates are macromolecules called polysaccharides, meaning they are made of many sugars.
Macromolecules, on the other hand, include things like proteins, nucleic acids (like DNA and RNA), and polysaccharides (like starch and cellulose). These molecules are composed of long chains of smaller subunits, which are linked together through covalent bonds.
So while glucose is an important biomolecule and plays a key role in metabolism, it is not typically considered a macromolecule.
When a water molecule forms hydrogen bond with another water molecule, which atoms are involved in the interaction?
Answers
Answer:
hydrogen and oxygen
Explanation:
What forms of energy are produced when
fossil fuels burn?
Answers
When fossil fuels burn, several forms of energy are produced, including:
Heat energy: The primary form of energy released during fossil fuel combustion is heat. Fossil fuels contain chemical energy stored for millions of years, and when they burn, this energy is released in the form of heat. The heat energy can be harnessed for various purposes, such as heating buildings or generating steam to drive turbines.
Light energy: Burning fossil fuels can also produce light energy in the form of flames or glowing embers. This light energy is a byproduct of combustion.
Mechanical energy: Heat generated by burning fossil fuels can be converted into mechanical energy. This is typically achieved by using heat to produce steam, which drives a turbine connected to a generator. The rotating turbine converts the heat energy into mechanical energy, which is further transformed into electrical energy.
Electrical energy: Through the process described above, burning fossil fuels can ultimately generate electrical energy. The mechanical energy produced by the turbine is converted into electrical energy by the generator. Electrical energy can power various devices, appliances, industries, and infrastructure.
It's critical to note that while burning fossil fuels can produce useful forms of energy, it also results in the release of carbon dioxide and other greenhouse gases. This contributes to climate change and environmental concerns. As a result, there is a global shift towards cleaner and renewable energy sources to mitigate these negative impacts.
It is not advisable to use drug S when patient has indigestion problem. Explain
Answers
It is essential to consult a healthcare professional before taking any medication when experiencing indigestion or any other health condition, to ensure that the medication is safe and effective for the patient's specific needs.
It is not advisable to use drug S when a patient has indigestion problem because drug S may worsen the patient's condition or interact negatively with other medications they are taking. Indigestion is a common condition that occurs when there is an imbalance in the digestive system, causing discomfort, bloating, and nausea. Some drugs can exacerbate these symptoms by increasing the production of stomach acid or by irritating the lining of the digestive tract. Drug S may have side effects that include gastrointestinal disturbances, including stomach pain, nausea, and diarrhea. This can make indigestion symptoms worse and lead to further discomfort and distress for the patient. Additionally, drug S may interact negatively with other medications that the patient is taking, further worsening their indigestion. Therefore, it is essential to consult a healthcare professional before taking any medication when experiencing indigestion or any other health condition, to ensure that the medication is safe and effective for the patient's specific needs.
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Consider the following reaction at equilibrium. What effect will reducing the pressure have on the system?
C3H8(g) + 5 O2(g) ↔ 3 CO2(g) + 4 H2O(l) ΔH° = -2220 kJ
Answers
The system will shift to the right to form more CO2 and H2O to increase the total pressure of the system. This shift will result in an increase in the concentration of products (CO2 and H2O) and a decrease in the concentration of reactants (C3H8 and O2).
What effect will reducing the pressure have on the system?A decrease in pressure favors the side with more particles. ∴ The reaction will shift towards the products, and will favor the forward reaction. There are 2 moles of gas particles on the side of the reactants, and 2 moles of gas particles on the side of the products.
How would decreasing the pressure affect the equilibrium of this reaction?When there is a decrease in pressure, the equilibrium will shift towards the side of the reaction with more moles of gas.
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1) To increase the amount of NH3 at 200 atm, the manufacturer should (increase, decrease, not change) the temperature of the reaction chamber.
2) This change in temperature would shift the reaction to the (left, right) because this equilibrium reaction is (exothermic, endothermic)
Answers
The temperature of the reaction should be decreased
This change in temperature would make the equilibrium to shift to the right.
What is the LeChatelier principle?
The Le Chatelier's principle, commonly referred to as the Le Chatelier's principle of equilibrium, is a chemical principle that describes how an equilibrium system reacts to environmental changes.
According to this theory, when an equilibrium system is exposed to an outside force, it will respond in a way that partially offsets the imposed change and restore equilibrium.
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Question:
Seawater contains salt, a/an
molecule that consists of a metal ion and a nonmetal ion.
Answers
Answer:
sodium chloride is an ionic molecule . which is typically the case when metals and nonmetals form bonds
Seawater contains salt, or sodium chloride, which is an ionic compound formed from the bonding of a metal ion (sodium) and a nonmetal ion (chloride) through the transfer of electrons. The ions' opposite charges attract to form the ionic bond.
Explanation:Seawater contains a significant amount of salt, often referred to as sodium chloride. This is a type of ionic compound that consists of a metal ion, sodium (Na), bonded with a nonmetal ion, chloride (Cl). The bond between these ions is formed through the transfer of electrons, resulting in a neutral compound. This is typical of salts, which often consist of a metal and nonmetal ion. The sodium ion carries a positive charge and the chloride ion carries a negative charge, and their attraction forms the ionic bond which holds the salt molecule together in seawater.
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What happens when a gas is heated
Answers
Answer:
The particles' kinetic energy is increased, allowing the gas to expand. When a gas is heated the volume will increase when gas is increased....
If I have 20 ml of 0.10 M acetic acid mixed with 15 ml of 0.10 M sodium acetate and 15 ml of water how do I find the pH?
Answers
The buffer solution has a pH of 5.36.
How to find pH?To find the pH of this buffer solution, use the Henderson-Hasselbalch equation:
pH = pKa + log([A⁻]/[HA])
where pKa = dissociation constant of acetic acid, [A⁻] = concentration of acetate ions, and [HA] = concentration of acetic acid.
Calculate the concentrations of acetate ions and acetic acid in the solution.
The initial moles of acetic acid are:
moles of acetic acid = volume of acetic acid x concentration of acetic acid
moles of acetic acid = 0.020 L x 0.10 mol/L
moles of acetic acid = 0.002 mol
After mixing with sodium acetate, the total volume of the solution is 50 mL, so the concentration of acetic acid and acetate ions are:
[HA] = moles of acetic acid / total volume of solution
[HA] = 0.002 mol / 0.050 L
[HA] = 0.040 M
[A⁻] = concentration of sodium acetate
[A⁻] = 0.10 M
The dissociation constant of acetic acid is pKa = 4.76.
Now, substitute these values into the Henderson-Hasselbalch equation:
pH = pKa + log([A⁻]/[HA])
pH = 4.76 + log(0.10/0.040)
pH = 4.76 + 0.60
pH = 5.36
Therefore, the pH of the buffer solution is 5.36.
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Hydrogen gas is collected over water at 23°C, 767 torr. At this temperature the vapor pressure of water is 21.0 torr. What is the partial pressure of hydrogen in the collected gas?
Answers
The partial pressure of hydrogen gas in the collected gas is 746 torr.
To determine the partial pressure of hydrogen gas in the collected gas, we need to consider the difference between the total pressure of the collected gas and the vapor pressure of water at the given temperature. The partial pressure of hydrogen gas is the pressure exerted by hydrogen alone.
Given information:
Total pressure of the collected gas (Ptotal) = 767 torr
Vapor pressure of water (Pwater) = 21.0 torr
The partial pressure of hydrogen gas (Phydrogen) can be calculated using Dalton's law of partial pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each individual gas.
Phydrogen = Ptotal - Pwater
Plugging in the given values:
Phydrogen = 767 torr - 21.0 torr
Phydrogen = 746 torr
Therefore, the partial pressure of hydrogen gas in the collected gas is 746 torr.
It's important to note that in this calculation, we assume that the water vapor does not react with or dissolve in the hydrogen gas and that the gases behave ideally. Additionally, it's assumed that the collected gas is dry, meaning all the water vapor has been removed or does not significantly contribute to the total pressure.
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