The isotope 9B is absent in the nuclear reactions 1H+0BeX+n.
Which three major isotopes are there?Protium, deuterium, and tritium are the three isotopes of hydrogen that are found in nature. These isotopes can also be identified by their mass number and element name. Nuclear transmutation reactions and nuclear decay reactions are the two main categories of nuclear reactions.
1 H has 1 proton, 1 electron, and 0 neutrons
and 9 Be has 4 protons, 4 electrons and 9−4=5 neutrons, so
X has 1+4=5 protons 1+4=5 electrons and 0+5−1=4 neutrons.
One of the neutrons is freed in the reaction. X must be boron with a molar mass of 5+4=9 g/mol: 9B.
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The distance between the K+ and Cl- ions inKCl is 2.8 × 10-10 m.Find the energy required to separate thetwo ions to an infinite distance apart, assum-ing them to be point charges initially at rest.The elemental charge is 1.6 × 10-19 C and theCoulomb constant is 8.99 × 109 N · m2/C2.1. 709.1 eV2. 8.91 eV3. 101.3 eV4. 5.14 eV5. 6.77 eV6. 4.37 eV
1. 709.1 eV. The energy required to separate the K+ and Cl- ions in KCl to an infinite distance apart can be calculated using the equation: E = k * Q1 * Q2 / r
where k is the Coulomb constant (8.99 × 10^9 N · m^2/C^2), Q1 and Q2 are the magnitudes of the charges of K+ and Cl- ions (1.6 × 10^-19 C), and r is the distance between the ions (2.8 × 10^-10 m). Plugging in the values, we get:
E = 8.99 × 10^9 N · m^2/C^2 * 1.6 × 10^-19 C * 1.6 × 10^-19 C / 2.8 × 10^-10 m
E = 709.1 eV
So, the answer is 1. 709.1 eV.
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based on the given ir spectrum and mass spectrum of an unknown compound what is a possible structure for the unknown comound
Based on the given IR spectrum and mass spectrum of an unknown compound, the possible structure could be an organic compound with a molecular formula of C5H10.
This could be a straight-chain alkane with five carbon atoms and ten hydrogen atoms, such as pentane. The IR spectrum could show absorption bands corresponding to C-H and C-C stretching vibrations, and the mass spectrum could show a peak corresponding to the molecular ion at m/z 72.
This suggests that the compound is likely a straight-chain alkane, such as pentane. To confirm the structure, further analysis of the IR and mass spectra can be done to compare the values to those of known compounds.
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identify the net ionic equation for the reaction that occurs when solutions of agno3 and nh4cl are mixed.
calculate the h3o /oh- ratio for solutions of your choice using all three values: the molecule count, quantity of moles, and concentration show your work
There are 10^7 times more H3O+ ions than OH- ions in the solution because the H3O+/OH- ratio is 10^7.
a mixture of two or more substances is called a solution. The components are dissolved in water to create an aqueous solution. The quantity of the solute (the item being dissolved) in a specified amount of the solvent is referred to as the concentration of a solution (water). The molecular weight, number of moles, or concentration of the ions in an aqueous solution can all be used to calculate the H3O+/OH- ratio. For instance, if the solution contains 0.1 M of HCl, the concentration of H3O+ ions will be 0.1 M, or equal to the addition of 0.1 M of HCl. Since OH- ions are always present in neutral solutions at a concentration of 1 x 10-7 M, the H3O+/OH- ratio can be computed as 0.1 M / 1 x 10-7 M.
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A system has reached chemical equilibrium: Which is true of the system? -there is no net. change in the concentration of reactants or products -the molecules have stopped combining and decomposing -the system is open there is no change taking place-All of the above are true
Neither the reactant nor product concentrations change overall. -The molecules are no longer fusing together or breaking down.
The amount of solute (the material being dissolved) per unit volume of solvent is known as the concentration of a substance in a solution (the substance in which the solute is dissolved). Using measures like molarity, molality, and mole fraction, concentration is a measurement of the amount of solute in a solution.The rate of a reaction and the final result of a chemical reaction can both be significantly impacted by variations in the concentration of the reactants and products. Understanding concentration is crucial for comprehending how solutions behave and how chemical reactions turn out. Additionally, adjustments to concentration can be made to regulate the rate of reactions, for as by varying the quantity of reactants added.
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what is the pH of a solution that contains 0.0425 moles of HCl in 6.50 litres of water?
Answer:
To find the pH of a solution that contains a strong acid like HCl, you can use the equation:
pH = -log[H+]
Where [H+] is the concentration of hydrogen ions in moles per liter. In this case, you know the concentration of HCl and the volume of water, so you can calculate the concentration of hydrogen ions by using the equation:
[H+] = (0.0425 moles HCl) / (6.50 liters water) = 0.0653846 moles/liter
Finally, you can calculate the pH:
pH = -log[0.0653846 moles/liter] = 1.18
So the pH of the solution is 1.18.
Explanation:
Do you want to know shot trick also?
Which of the following actions is the first priority of care for a client exhibiting signs and symptoms of coronary artery disease?
A Decrease anxiety
B Enhance myocardial oxygenation
C Administer sublingual nitroglycerin
D Educate the client about his symptoms
The first focus of care for just a client displaying symptoms and signs of coronary heart disease is the activity listed below. B improve the oxygenation of the heart.
Which of the following procedures should be the first priority when treating a client who has coronary artery disease symptoms and signs?The first goal of care is giving the client additional oxygen. In order to help with oxygenation and stop further damage, more oxygen is given because an infarction deprives the myocardium of oxygen.
What medical intervention is the primary and most critical for myocardial infarction?Surgery to sever the coronary arteries. It's open heart surgery here. To construct a new pathway for blood through the heart, a surgeon pulls a healthy blood artery from another section of the body. then the blood travels around the coronary artery that is obstructed or narrowed. When a person is having a heart attack, CABG may be performed as an urgent procedure.
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a solid aluminum sphere has a mass of 37 g . use the density of aluminum to find the radius of the sphere in inches.
The radius of the sphere is 1.484 cm or 0.58 inches.
The density of aluminum is 2.7 g//cm³. To calculate the radius of the sphere, we can use the formula of density first:
Density = mass/volume
Given that the mass is 37 grams,
2.7 = 37 / V
2.7V = 37
V = 13.7 cm³
The formula for the volume of sphere is V = 4/3 π r³
Plug the numbers:
13.7 = 4/3 * π * r³
13.7 = 4/3 * 22/7 * r³
r³ = 3.269
r = 1.484 cm.
Convert that to inches (1 inch = 2.54 cm) = 0.58 inches.
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Upon solvation, energy is always: Select the correct answer below: O absorbed O released O constant O depends on the solution
Upon solvation, energy is always released. Correct answer: letter B.
This is because the energy required to break the bonds between the solvent molecules and the solute molecules is greater than the energy released when the solute molecules form new bonds with the solvent molecules.
The amount of energy released or absorbed during solvation is dependent on the type of solute and solvent, and the concentration of the solution.
In addition to the energy released or absorbed during solvation, the process also affects the thermodynamic properties of the solution. Generally, the entropy of a solution increases upon solvation due to the increased number of molecules and the increased number of possible states.
This leads to a decrease in the solution's temperature, as energy is released in the form of heat.
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Measure the height of the column of gas in the tube. (Click the ruler and capillary tube.)
The temperature of the columns is 40 degrees. From the image that has been attached to the answer.
How do we measure the temperature?We know that in the case of this set up that we would have to read the set up and the position of the lines and the point where we can see the end of the thread of the mercury line of the thermometer.
The thermometer can be defined as device that can be used in the measurement of temperature and in this case, we are having the temperature of the set up that is shown in the image that is attached.
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f dry solute is heated, which of the following can occur? group of answer choices it will turn into an oil it will expand it may become damaged it will evaporate
Higher temperatures result in an increase in kinetic energy, which allows the solvent molecules to more efficiently damage the intermolecularly attracted solute molecules.
Solubility of the solute in the solution is increased by heating saturated solution. Because the particles gain kinetic energy as the temperature rises, they move faster, increasing the likelihood of collisions and diffusion. By giving energy to break bonds in the material, more heat is added, which speeds up the dissolving reaction. This is the most typical instance in which a rise in temperature results in a rise in the solubility of solids.
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Compound A has the molecular formula C14H25Br and was obtained by the reaction of sodium acetylide with 1,12-dibromododecane. On treatment of compound A with sodium amide, compound B (C14H24) was obtained. Ozonolysis of compound B gave the diacid HO2C(CH2)12CO2H. Catalytic hydrogenation of compound B over Lindlar palladium gave compound C (C14H26), and hydrogenation over platinum gave compound D (C14H28). Further, C yielded O=CH(CH2)12CH=O on ozonolysis. Assign structures to compounds A through D so as to be consistent with the observed transformations.
The structures of the compounnds A and D are shown in the image attached.
What is ozonolysis?
Ozonolysis is a chemical reaction in which ozone (O3) is used to cleave carbon-carbon double bonds in organic compounds. The reaction typically results in the formation of carbonyl compounds (such as aldehydes or ketones) and the cleavage of the original molecule into two smaller fragments.
Ozonolysis is often used in organic synthesis as a tool for the functional group analysis of complex molecules. The reaction mechanism involves the attack of ozone on the double bond, followed by the formation of a highly reactive intermediate, which undergoes further reactions to produce the final products.
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When a solution is saturated and additional solute sits at the bottom of the vessel: Select the correct answer below: Some solute will precipitate but no more will dissolve, so the concentration will fall. More solute will dissolve, but no more will precipitate, so the concentration will rise, The solute will continue to dissolve and precipitate at precisely the same rate so that the concentration will remain fixed There is no activity involving the solute, so the concentration will remain fixed
A solution will get more concentrated when it reaches saturation and more solute settles at the bottom of the container.
When a small amount of solute is introduced to a saturated solution, it does not dissolve. The solute is not altered in the solution. At some time, the solution reaches a point of saturation. Therefore, if you add more of the chemical, it won't continue to dissolve and will remain solid. The quantity relies on the molecular interactions between the solvent and the solute. A solution that contains more solute than the saturated solution at a specific temperature is referred to as a super saturated solution. Solute concentration in a supersaturated solution is higher than what would normally dissolve at a given temperature.
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chemists commonly use a rule of thumb that an increase of 10 k in temperature doubles the rate of a reaction. what must the activation energy be for this statement to be true for a temperature increa
The activation energy in this scenario must be 52.4 kJ/mol, according to the Arrhenius equation.
Only at a certain temperature for a given activation energy does the general rule that the rate of reaction doubles for a 10° C increase in temperature apply. Establish a connection between the temperature and activation energy at which the rule is valid. Ignore any concentration-related temperature variations. A general rule of thumb in organic chemistry states that a reaction's pace doubles every 10C increase in temperature from room temperature. As a general rule, many reactions have reaction rates that double every ten degrees Celsius of temperature rise. For a given reaction, the ratio of its rate constant at a higher temperature to its rate constant at a lower temperature is known as its temperature coefficient, (Q).
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The positively charged particles found in atoms are called ?
Answer:
Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge. Neutrons, on the other hand, don't have a charge.
Explanation:
hope this helps you
Question Which statement best describes the relationship between changes in air pressure and wind speeds? Responses When a high- and a low-pressure air mass are far apart, air moves quickly from high to low pressure. When a high- and a low-pressure air mass are far apart, air moves quickly from high to low pressure. When a high- and a low-pressure air mass are far apart, air moves quickly from low to high pressure. When a high- and a low-pressure air mass are far apart, air moves quickly from low to high pressure. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure. When a high- and a low-pressure air mass are close together, air moves slowly from high to low pressure.
The statement which best describes the air pressure and wind speed is option c is correct. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure.
What are winds?Winds are passage of air from high pressure area to low pressure area. Air masses may travel from one place to another as a result of variations in air pressure. Air masses often move from high-pressure regions to low-pressure regions.
Winds therefore sweep away from high-pressure zones and toward low-pressure ones. The winds can moves the air masses in the atmosphere and the air masses collide in the clod and humid air.
Winds transfer meteorological conditions from the source location to the destination zone as they move air masses. The air mass may collide with another air mass that has a different temperature and humidity as it enters a new area. This may bring about a powerful storm.
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cacl2 is found in the rutile structure where the ca2 ions (small black sphere) are surrounded by six cl- ions (large spheres), forming an octahedral environment with coordination number, cn
Calcium chloride (CaCl2) is found in the rutile structure, where calcium ions (Ca2+) are surrounded by six chloride ions (Cl-) to form an octahedral coordination environment with a coordination number (CN) of 6.
Certainly! The coordination number of a molecule refers to the number of atoms, ions, or molecules that surround a central atom or ion in a coordination complex or coordination compound. The coordination number of CaCl2 in the rutile structure is 6, which means that each calcium ion is surrounded by 6 chloride ions.
The octahedral coordination environment is a geometric arrangement where a central atom or ion is surrounded by six other atoms or ions, arranged at the vertices of an imaginary octahedron. This shape can be thought of as two pyramids joined at their bases. In the case of CaCl2 in the rutile structure, the calcium ions occupy the center of the octahedron and the chloride ions occupy the vertices of the structure.
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f a simple distillation were to be performed on this mixture( from question 1 ), what would be the composition of the initial distillate?
By applying the formula y = ( * x) / 1 + ( -1) * x, where "" denotes relative volatility, "x" denotes the mole fraction of the substance in the liquid, and "y" is the mole fraction of the substance distillation in the vapour, you may determine the mole fraction of a chemical in a vapour.
What exactly is the simple distillation mixture?
Definition: A technique for separating mixes in a boiling liquid combination based on differences in their volatilities. After applying heat to a sample mixture, the components are instantly cooled by the action of cold water in a condenser.
In distillation Mcq, what exactly is the distillate?
In distillation, what exactly is the distillate? Explanation: The vapour in a distillation column that is collected, condensed into a liquid, and collected in the collecting flask is referred to as a distillate in the distillation process.
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identify the best conditions for reaction b. cat. h , naoch3 , dmso cat. h , naoch3 , ch3oh naoch3 , dmso ch3oh , heat naoch3 , ch3oh
Explanation:
The best conditions for reaction b are naoch3, ch3oh, and heat.
What mass of solid FeCl3 is formed when 200 mL of 0.375 N Fe3+ is mixed with 400 mL of 0.175 N Cl2?
Please anwer
Answer:
4.05 g
Explanation:
The balanced chemical equation for the reaction between Fe3+ and Cl2 is:
Fe3+ + 3 Cl2 -> FeCl3
To find the amount of FeCl3 formed, we need to find the limiting reactant and then calculate the amount of product that can be formed.
First, we calculate the number of moles of Fe3+ and Cl2:
Fe3+: 0.375 N * 200 mL = 0.075 mol
Cl2: 0.175 N * 400 mL = 0.07 mol
Since Fe3+ is the limiting reactant, we can use its moles to determine the amount of FeCl3 that can be formed:
0.075 mol Fe3+ * (1 mol FeCl3 / 3 mol Cl2) = 0.025 mol FeCl3
Finally, to find the mass of FeCl3, we use its molar mass:
0.025 mol FeCl3 * 162.2 g/mol = 4.05 g FeCl3.
So, 4.05 g of FeCl3 is formed when 200 mL of 0.375 N Fe3+ is mixed with 400 mL of 0.175 N Cl2.
a carbonyl is bonded to cyclopentane and o minus. this reacts with lithium aluminum hydride followed by an aqueous workup to give the product. t/f
The Statement is True. A carbonyl is bonded to cyclopentane and o minus. This reacts with lithium aluminum hydride followed by means of an aqueous workup to provide the product.
A Chemical reaction is a gadget that occurs whilst two or more molecules engage to form a logo-new product(s). Compounds that interact to produce new compounds are referred to as reactants while the newly fashioned compounds are referred to as products.
The techniques, wherein a substance or substances go through a chemical change to offer new substance or substances, with completely new houses, are referred to as chemical reactions. A chemical reaction is a technique that affects the chemical transformation of 1 set of chemical substances to every other. A chemical response happens when one or greater compounds, called reactants, are changed into one or more splendid materials, known as merchandise. substances are either chemical additives or compounds.
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which statement(s) is/are true regarding chemical equilibria? select all that apply. g the rate constants for the forward and reverse reactions are equal when a chemical reaction is at equilibrium. the concentrations of reactants and products are constant at equilibrium.
Chemical reactions don't stop when they reach equilibrium.Both the forward and backwards reflexes often happen at the same rate.
What claims about chemical equilibrium are true?Authentic claims on chemical equilibrium:Reactant and product concentrations are both constant.Reactant and product concentrations are both constant.If there is no increase inside the concentration of the reactants or products, equilibrium has been reached.
Which of the following is accurate for every equilibrium system?The forward reaction rate is the same as the reverse reaction rate.Ah, so that's the claim.That's accurate.The forward and backward reactions happen at the same rate in an equilibrium, which is true.
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8.50 of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 160./gmol, is burned completely in excess oxygen, and the mass of the products carefully measured: product mass carbon dioxide 14.03g water 3.83g
The compound would have a molecular formula of C5H10O2.
What is the empirical formula of the compound?
The empirical formulas is the simplest formula of a compound.
We know that;
Mass of the carbon = 14.03 * 12/44 = 3.82 g
Moles of C = 3.82 g/12 g/mol = 0.32 moles
Mass of water = 3.83 * 2/18 = 0.43 g
Moles of H = 0.43 g/1 g/mol = 0.43 moles
Mass of oxygen = 8.5 - (3.82 + 0.43)
= 4.25 g
Moles of oxygen = 4.25 g/16 g/mol = 0.27 moles
We can now divide through by the lowest ratio;
C - 0.32 H - 0.43 O - 0.27
C - 1 H - 2 O - 1
The empirical formula is CH2O
The molecular formula is;
[12 + 2+ 16]n = 160
n = 160/30
n = 5
The molecular formula is;
C5H10O2
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for the following compound how many different signals would you see in the carbon nmr? (assume that you can see them all.)
each of the eight carbons in the compound are distinct, producing 1 signal each on a 13C NMR spectrum, totaling to 8 signals.
NMR spectroscopy, in addition to identifying molecules, provides detailed information about their structure, dynamics, reaction state, and chemical environment. The most common types of NMR spectroscopy are proton and carbon-13 NMR spectroscopy, but it is applicable to any sample containing spin-containing nuclei.
Because of the presence of this chiral centre, any plane of symmetry that would make any of its carbon atoms equivalent is ruled out. As a result, each of the compound's eight carbons is distinct, producing one signal on a 13C NMR spectrum, for a total of eight signals.
There are three peaks in the spectrum, indicating that there are only three different environments for the carbons, despite the fact that there are four carbon atoms.
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in which of the following situations is angular momentum approximately conserved in a system? (hint: recall what conditions are necessary for translational momentum to be conserved.)
According to the law of conservation of angular momentum, when no net torque is applied to a system, which in this case refers to the rotating object or objects, angular momentum is conserved.
What is angular momentum?The rotational equivalent of linear momentum in physics is called angular momentum, also known as moment of momentum or rotational momentum.
It is a conserved quantity, meaning that the total angular momentum of a closed system stays constant, making it a significant physical quantity. Both the direction and the amplitude of angular momentum are conserved. The functional characteristics of bicycles and motorbikes, frisbees, rifled bullets, and gyroscopes are due to the conservation of angular momentum.
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Question number 4 and 5
Based on the given data:
the experimental percentage water in the hydrate is 22.0%the percentage error is 38.3%What is the percentage water in the hydrate?Mass of the hydrated salt = mass of evaporating dish + sample before heating - mass of evaporating dish
Mass of hydrated salt = 22.611 - 20.316
Mass of hydrated salt = 2.295 g
Mass of anhydrous salt = mass of evaporating dish + sample before heating - mass of evaporating dish + sample after 3rd heating
Mass of anhydrous salt = 22.611 - 22.106
Mass of anhydrous salt = 0.505 g
Experimental percentage water in the hydrate = 0.505/2.295 * 100%
Experimental percentage water in the hydrate = 22.0%
Percentage error = |True value - calculated value| / True value * 100%
Percentage error = |35.67 - 22.00|/35.67 * 100%
Percentage error = 38.3%
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which of the following methods can be used to prepare an alkenylbenzene in one synthetic step? (select all that apply.)
The methods that can be used to prepare alkyl benzene in one steps includes the dehydration of a benzylic alcohol, dehydrogenation of an alkylbenzene and dehydrohalogenation of a benzylic halide.
Several reagents can be used to carry out the side-chain oxidation of an alkylbenzene. Among the most commonly used reagents are:
Alkylbenzene substrate
Oxidizing agent (such as sodium hypochlorite or potassium permanganate)
Acid catalysts (such as sulfuric acid or hydrochloric acid)
Solvent (such as water or methanol)
such as, Chromium trioxide (CrO3) and a mixture of sulfuric acid (H2SO4) and nitric acid (HNO3)
Sodium hypochlorite (NaClO)
Potassium permanganate (KMnO4)
Sodium chlorite (NaClO2) and sodium hydroxide (NaOH)
Osmium tetroxide (OsO4) and hydrogen peroxide (H2O2)
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Auroras are lights that appear at Earth’s northern and southern poles. What is the main cause of an aurora?
A.
Solar wind enters Earth’s atmosphere, and particles interact with ions.
B.
Bubbles of gas are ejected from Earth’s outer crust.
C.
Sunlight reflects off the surface of the Moon during an eclipse.
D.
The northern and southern poles are cooler than the rest of Earth.
Answer:
What is the main cause of an aurora?
The short answer to how the aurora happens is that energetic electrically charged particles (mostly electrons) accelerate along the magnetic field lines into the upper atmosphere, where they collide with gas atoms, causing the atoms to give off light.
Explanation:
Explain why the Velocity of a recoiling gun is lower than that of ejected bullet
The velocity of an object is dependent on its mass. The mass of gun is greater the mass of a bullet. Hence, lower mass leads to greater velocity for bullet.
What is velocity ?Velocity of an object is the measure of the distance it covered within unit time. It is the rate of speed. Velocity is a vector quantity having both direction and magnitude.
The velocity of an object depends on its mass, medium of travel, frictional force or any air resistance if present etc.
As the mass increases, the more force have to applied to speed up the object. Here, the gun is having a backward force due to its mass and this force for a bullet is negligible for a bullet having very less mass.
Therefore, the bullet have greater velocity than a gun.
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$02 g of iron was added to 50 cm³ of 0.5 mol/dm³
readilute sulfuric acid. When the reaction was
ronover, the mixture was filtered. 0.6 g of iron was
found unreacted. (A₁: Fe = 56.)
b
c
tha Name the limiting reactant in this reaction.
How many moles of iron atoms took part?
How many moles of sulfuric acid reacted?
Write the equation for the reaction, and
deduce the charge on the iron ion that formed.
What volume of hydrogen (calculated at rtp)
bubbled off during the reaction?
a. The limiting reactant in this reaction is sulfuric acid.
b. 0.00357 moles of iron atoms took part in the reaction
c. 0.00357 moles of sulfuric acid reacted.
d. the reaction between iron and sulfuric acid is
Fe + H2SO4 → FeSO4 + H2
The iron ion that forms in this reaction is Fe2+.
e. 9.23 L of hydrogen gas bubbled off during the reaction at 25°C and 1 atm.
What is limiting reactant?The limiting reactant is described as the substance that runs out first, determining the maximum amount of product that can be produced. In this case, the amount of sulfuric acid present limits the amount of iron that can react.
b. Moles of iron atoms:
The number of moles of iron atoms can be calculated as follows:
0.2 g of iron / 56 g/mol = 0.00357 moles of iron
c. Moles of sulfuric acid:
0.00357 moles of iron / 1 mole of sulfuric acid = 0.00357 moles of sulfuric acid
e. Volume of hydrogen:
The volume of hydrogen gas that bubbled off during the reaction can be calculated using the Ideal Gas Law:
PV = nRT
V = nRT / P
V = 0.00357 x 8.31 x 298 / 1 = 9.23 L
In conclusion, 9.23 L of hydrogen gas bubbled off during the reaction at 25°C and 1 atm.
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