Due to the ethane balanced equation's 1:1 mole ratio between CO and CO2, 4.60 mol of CO will completely burn to create 4.60 mol of CO2.
When 14 moles of oxygen and 5 moles of ethane are combined, how many moles of carbon dioxide result?800K is achieved by heating 5 moles of ethane and 14 moles of oxygen. B: Include 2 moles of carbon dioxide in the mixture used for the reaction. C: The reaction will now start and result in the production of 12 moles of ethane and 46 moles of carbon dioxide.
C2H6 O2 CO2 H2O is what kind of reaction?An illustration of a combustion reaction is shown here, in which ethane reacts with oxygen to produce carbon dioxide and water.
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a certain substance has a normal freezing point of and a molal freezing point depression constant . calculate the freezing point of a solution made of of urea dissolved in of . round your answer to significant digits.
A certain substance X has the normal freezing point of -10.1 °C and the molal freezing point depression constant Kf = 5.32 °C.kg. mol⁻¹. The freezing point of a solution is - 15.4 °C.
The Molal freezing point depression constant = 5.32 °C kg mol⁻¹
The Mass of urea (solute) = 29.82 g
The Mass of solvent = 500 g = 0.500 kg
The Molar mass of urea = 60.06 g/mole
The expression is as follows :
ΔT = i k m
T - Ts = i k × ( mass of urea / molar mass of urea × mass of solvent )
Where,
Ts = freezing point of solution
T = freezing point of solvent = -10.1 °C
i = 1 , Van't Hoff factor
k = freezing point constant = 5.32 °C kg mol⁻¹
T - Ts = i k × ( mass of urea / molar mass of urea × mass of solvent )
- 10.1 - Ts = 1 × 5.32 ( 29.82 / 60.06 × 0.500)
Ts = - 15.4 °C
This question is incomplete, the complete is :
A certain substance X has a normal freezing point of -10.1 °C and a molal freezing point depression constant Kf = 5.32 °C.kg. mol⁻¹. Calculate the freezing point of a solution made of 29.82 g of urea ((NH₂)₂CO) dissolved in 500 g .
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how many grams of na2so4 should be added to 340. g of water to make a solution with a colligative molality of 0.420 m?
82.7 g Na2SO4 should be added to 340. g of water to make a solution with a colligative molality of 0.420 m
Calculate the number of moles of Na2SO4 needed:
0.420 m * (340 g H2O / 1000 g H2O)
= 0.142 moles Na2SO4
Convert moles to grams:
0.142 moles * 142 g/mo
l = 20.2 g Na2SO4
Add 82.7 g Na2SO4 to 340 g H2O to make the 0.420 m solution.
Note: Molarity (M) is the number of moles of solute per liter of solution, while molality (m) is the number of moles of solute per kilogram of solvent (water).
82.7 g Na2SO4 should be added to 340. g of water to make a solution with a colligative molality of 0.420 m
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if you were to complete a mass balance on a coffee roaster, which of these would not be a material stream exiting out of the roaster? (A). Spent Coffee Grounds, (B) Chaff, (C) Roasted Coffee Beans, (D) Water Vapor, Carbon Dioxide and other VOCs
Due to the fact that used coffee grounds are a waste product and a remnant of the roasting process, they are not a material stream leaving the roaster.
What chemical processes take place when roasting coffee?Maillard Response The Maillard reaction is crucial for the emergence of roasted coffee's flavour and colour. Carbonyl groups (from sugars) and amino groups in proteins interact at temperatures between 150 and 200 °C to create fragrance and flavour chemicals.
What steps are involved in roasting coffee?The steps involved in roasting coffee are cleaning, roasting, cooling, grinding, and packing. A process flow diagram for a typical coffee roasting operation. Green coffee bean bags are opened by hand or mechanically, put into a hopper, and screened to remove the foreign object
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when all the electrons in an atom occupy the lowest possible energy states, the atom is said to be in its:
when all the electrons in an atom occupy the lowest possible energy states, the atom is said to be in its Ground state.
A quantum mechanical system's ground state is its stationary, lowest energy state; this energy is often referred to as the system's zero-point energy. Any state that has more energy than the ground state is said to be excited. The ground state is frequently referred to as the vacuum state or the vacuum in quantum field theory.
They are referred to as degenerate if they have more than one ground state. There are degenerate ground states in many systems. Degeneracy arises whenever a unitary operator exists that interacts nontrivially with a ground state and commutes with the system's Hamiltonian.
The third law of thermodynamics states that a system is in its ground state at absolute zero degrees Celsius, and that ground state's degeneracy determines the system's entropy. At absolute zero, many systems, including a flawless crystal lattice, have a singular ground state and so have zero entropy. In systems that display negative temperature, it is also conceivable for the most excited state to have absolute zero temperature.
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what will happen if the recrystallization mixture is cooled very quickly so that crystals form very rapidly?
If the recrystallization mixture is cooled too quickly, it can result in the formation of small, poorly formed crystals. When cooling happens too rapidly, there is not enough time for the solute molecules to arrange themselves in an orderly fashion and form large, well-formed crystals.
Instead, the solute molecules will form many small, irregularly shaped crystals, which can make it difficult to separate them from the solvent during filtration.
This can result in an impure product with low yield, as well as longer processing times and increased difficulty in purifying the solute.
Additionally, small crystals can also cause difficulties during the washing and drying process, as they tend to stick together and are more difficult to handle.
It is important to control the cooling rate during recrystallization to ensure that well-formed crystals are produced.
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when 0.165 grams of a protein were dissolved in 40.7 ml of solution at 21.9 degrees c, the osmotic pressure was found to be 49.2 torr. calculate the molar mass of the protein.
When 0.165 grams of protein is dissolved in 40.7 ml of the solution at 21.9 °C, the osmotic pressure was found to be 49.2 torr. The molar mass of the protein is 1536.5 g /mol.
The mass of the protein = 0.165 g
The volume = 40.7 mL
The osmotic pressure = 49.2 torr = 0.064 atm
Temperature = 21.9 °C = 294.9 K
The osmotic pressure is expressed as :
π = M R T
Where,
π = osmotic pressure
M = molar concentration
R = constant
T = temperature
M = 0.064 / ( 0.082 × 294.9 )
M = 0.00264 M
Moles = molarity × volume
= 0.00264 × 0.0407 L
= 0.0001074 mol
Molar mass = mass / moles
= 0.165 / 0.0001074
= 1536.5 g /mol
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if you dissolve 0.3 moles of hbr in 1 l of water, what do you expect to be present in the beaker after the compounds have had time to react?
Hydrobromic acid is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water.The reaction between HBr and [tex]H_{2} O[/tex] is a complete reaction. One mole of strong acid dissociates in water to yield one mole of [tex]H_{3} O{+}[/tex] and one mole of its conjugate base.
Between HBr and water, hydrogen bonding occurs. Because of this intermolecular hydrogen bonding, HBr is soluble in water.
The reaction between HBr and [tex]H_{2} O[/tex] does not produce a buffer solution. Because strong acids dissociate completely in solution, they cannot be used as a buffer.
The reaction between HBr and [tex]H_{2} O[/tex] is finished In water, one mole of strong acid dissociates to produce one mole of [tex]H_{3} O^{+}[/tex] and one mole of its conjugate base.
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after a precipitation reaction with 0.64m h2so4 was completed, you centrifuge the sample, dry and weigh it. the ppt is found to weigh 0.109 grams. based on this mass, what was the original concentration of the unknown pb(no3)2 solution in mol/l? answer to 3 sf.
The original concentration of the Pb(NO₃)₂ solution in mol/L would be 0.00036 moles / 0.64 L = 0.0000056 mol/L = 0.056 mM (rounded to 3 significant figures).
To determine the original concentration of the unknown Pb(NO₃)₂ solution, we need to perform a mass-to-moles conversion. The equation for the precipitation reaction between Pb(NO₃)₂ and H₂SO₄ is as follows:
Pb(NO₃)₂ + H₂SO₄ -> PbSO₄ + 2HNO₃
The molar mass of PbSO₄ is 303.2 g/mol. So, 0.109 g of PbSO₄ is equal to 0.109 g / 303.2 g/mol = 0.00036 moles of PbSO₄. Since the stoichiometry of the reaction is 1:1 between Pb(NO₃)₂ and PbSO₄, we can assume that the same number of moles of Pb(NO₃)₂ were present in the original solution. Therefore, the original concentration of the Pb(NO₃)₂ solution in mol/L would be 0.00036 moles / 0.64 L = 0.0000056 mol/L = 0.056 mM (rounded to 3 significant figures).
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6. (a) for a second-order reaction, what quantity, when graphed versus time, will yield a straight line? (b) how do the half-lives of first-order and second-order reactions differ?
(a) The quantity that, when graphed versus time, will yield a straight line for a second-order reaction is the inverse of the concentration of the reactants.
(b) The half-lives of first-order and second-order reactions differ in that the half-life of a first-order reaction is constant, while the half-life of a second-order reaction decreases with time.
What are the first order and second order reactions?
First order reactions involve a single reactant and have a rate proportional to the concentration of that reactant. This means that the reaction rate increases as the concentration of the reactant increases. A first order reaction will have a reaction rate constant ([tex]k[/tex]) that is independent of the concentration of the reactant.
Second order reactions involve two reactants and have a rate proportional to the concentration of both reactants. This means that the reaction rate increases as the concentration of both reactants increase. A second order reaction will have a reaction rate constant ([tex]k[/tex]) that is dependent on the concentrations of the reactants.
For example, The rate of the reaction can be expressed as:
[tex]Rate = k[A]\times [B]y[/tex]
Where k is the rate constant, [[tex]A[/tex]] is the concentration of [tex]A, [B][/tex] is the concentration of [tex]B[/tex], and x and y are the orders of the reactants [tex]A[/tex] and [tex]B[/tex], respectively.
If [tex]x = 1[/tex] and [tex]y = 0[/tex], then the reaction is first order in [tex]A[/tex] and zero order in [tex]B[/tex].
[tex]Rate = k[A][/tex]
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The liquid and ___ states are called the ___states of matter because their particles are very close together.solid, condensed
Because of particles in liquid and solid phases are so close combined, they are referred to as condensed states of matter.
What is an example of state of matter?Bose-Einstein condensates (BEC), solid, liquid, gasses, plasma physics, and other forms of matter all have unique physical characteristics. Liquids fill containers, solids are frequently tough, and gases are all around us in the atmosphere. Each of these conditions is referred to as a phase.
What five states of matter are there?Based on the physical attributes they represent, states of material are the categories into which matter is subdivided. They can be separated into the five different states of matter—solid, liquid, gas, liquid, and Bose-Einstein cloud.
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From the following items, which is closest in size to one mole of gas at STP? A) A car. B) An elephant. C) A microwave. D) A marble.
In the given query, none of the options presented are the same size as one mole of gas at STP. At STP, one mole of petrol has a volume of 22.4 L, which is larger than a marble but smaller than a car or an elephant.
At STP (standard temperature and pressure), the temperature is 273 K and the pressure is 1 atm. One mole of an ideal gas at STP occupies a volume of 22.4 L.
To determine which of the items is closest in size to one mole of gas at STP, we need to use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of gas.
A) A car is much larger than one mole of gas at STP, so it is not the correct option.
B) An elephant is also much larger than one mole of gas at STP, so it is not the correct choice.
C) A microwave is much smaller than one mole of gas at STP, so it is not the correct option.
D) A marble is much smaller than one mole of gas at STP, so it is not the correct choice.
Therefore, none of the options provided is closest in size to one mole of gas at STP. One mole of gas at STP occupies a volume of 22.4 L, which is much larger than a marble and much smaller than a car or an elephant.
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was the gradual color change observed when the sodium thiosulfate (na2s2o3) crystal was added to the aqueous solution of ki/i2 in station c evidence of a chemical or physical change?
Based on the data and Florence's observations, Florence has observed a chemical change. 2Na2S2O3 + I2 ----> Na2S4O6 + 2NaI.
What changes chemically?A chemical reactions is the transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these.It happens when two substances mix to create a new material.
In science, what exactly is a chemical change?A carrot being chopped up or ice dissolving into water are two examples of physical changes.Chemical transformations occur when two or more components are mixed to create a brand-new compound.You have such a new material after a chemical transformation.A chemical change might occur when burning paper or when baking a cake.
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which below is true of acids? choose one: a. acids are neutral and do not readily react with other substances. b. an acid accepts hydrogen ions from a water-based solution. c. an acid is hydrophobic. d. an acid donates h to water.
The statement (b) An acid accepts hydrogen ions from a water-based solution is true about acids as an acid is a substance that donates hydrogen ions (H+) to a water-based solution.
An acid is a type of molecule or ion that donates hydrogen ions (H+) to a solution when dissolved in water. The release of hydrogen ions makes the solution more acidic, meaning it has a lower pH value (below 7) than a neutral solution, which has a pH of 7.
The strength of an acid is determined by its ability to donate hydrogen ions to a solution. Strong acids, such as hydrochloric acid (HCl), easily dissociate in water and release a large number of hydrogen ions, making the solution highly acidic. On the other hand, weak acids, such as acetic acid (CH3COOH), dissociate to a lesser extent and release fewer hydrogen ions, resulting in a solution that is only slightly acidic.
Acids play a crucial role in many chemical reactions, including those that occur in living organisms. For example, the human body produces and uses various acids, such as gastric acid, to help with digestion.
It's also important to note that not all substances that taste sour or cause corrosion are necessarily acids. The definition of an acid is based on its ability to donate hydrogen ions to a solution, not its taste or its effects on other substances.
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What is chemical energy?
Energy that flows from warm to cold objects
Energy that flows in wires
Energy that is stored in substances
Energy that travels in waves
D is Chemical energy
Energy that is stored in substances
a closed system allows for the exchange of mass and not energy with the surroundings.A) TrueB) False
False. A closed system permits mass exchange with the environment but not energy.
What is mass defined simply?The mass of a something is the total amount of stuff or materials that make it up. The kilogram, or kg, is the symbol for the measurement units. It's important to remember that mass is distinct from gravity. Mass never changes, whereas weight fluctuates as the center of gravity shifts.
We mass things because...Knowing an object's mass is essential since it allows you to determine that however much power will be needed to move it. It is common practice to calculate the mass of an unspecified object using recognized units of weight such milligrams, grams, and kilograms. Anything with both mass and quantity is considered to be matter.
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what is a magnetic domain? group of answer choices clusters of atoms where every atom has an opposing magnetic field clusters of atoms with only north poles clusters of atoms with their magnetic fields aligned clusters of atoms with their magnetic fields not aligned
A magnetic domain is a cluster of atoms with their magnetic fields aligned.
What is alignment of magnetic fields?The atoms all have the same magnetic orientation, and the overall field of the domain is greater than the individual fields of the atoms. This alignment of the magnetic fields is caused by the exchange of electrons between the atoms in the domain. The magnetic domains are important for the storage of information in magnetic recording media, as the magnetic domains can be manipulated to encode data.
Clusters of atoms with only north poles, or clusters of atoms with their magnetic fields not aligned, are not valid magnetic domains. This is because all atoms must have an opposing magnetic field in order to create an overall field that is greater than the individual fields of the atoms.
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What is the change in temperature if an object goes from 273 k to 243 k?
Since 273 k – 243 k equals 30, the temperature change for an object going from 273 k to 243 k is 30 k.
We use 273 in Kelvin because?Colors and temperatures can both be measured in Kelvin: A temperature unit commonly used in science is the Kelvin scale. Lord Kelvin created the scale after realizing the need for one with absolute zero as the zero point, which translates to 0 K as the lowest attainable temperature, or -273,15 °C.
Can Kelvin scale be negative?On the Kelvin scale, a body's temperature cannot be negative. Since the Kelvin scale's absolute zero represents the lowest temperature that may exist, it is impossible for it to be negative.
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10.0 g of zn powder is added into a solution of silver nitrate, agno3. the total mass of the metallic solid recovered at the end of the reaction is 12.32 g. assuming that the reaction did not go to completion, how many grams of zn did react?
4.25 g Zn did react if 10.0 g of zn powder is added into a solution of silver nitrate, agno3. the total mass of the metallic solid recovered at the end of the reaction is 12.32 g.
So the equation I got what
Zn (s) + 2AgNO3 (aq) -> 2Ag (s) + Zn(NO3)2 (s)
I think the zinc nitrate is solid because the question asks about a metallic solid.
Then,
12.32 g X 1 mol/189.41 g Zn(NO3)2 = .065 mol Zn(NO3)2
Then to find the original Zn,
.065 mol X 1 mol Zn/1mol Zn(NO3)2 = .065 mol Zn
.065 mol Zn X 65.39 g/1 mol = 4.25 g Zn.
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cacl2 is a salt that forms as the result of what type of bond?
Ionic bonds, which hold the ions together, result in an ionic compound. In most cases, ionic compounds are created between metal and nonmetal components.
What is an ionic connection, exactly?The full transfer of certain ions from one nucleus to another results in the formation of an ionic connection. A negatively charged ion known as a cation results from an atom losing three or more electrons. An anion, or negatively charged ion, is created when an atom gains one or more electrons.
Ionic and covalent bonds: what are they?The transfer of electrons between more than two atoms forms a covalent connection. When two maybe more ions join contact, they can create ionic bonds that are kept together by charging differences.
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How do phospholipids interact with water?
Phospholipids spontaneously form bilayers in aqueous solutions because their fatty acid tails are not highly soluble in water and exposed polar head groups that are interact with water.
What draws phospholipids to water?A glycerol molecule is linked to two hydrophobic fatty acid chains by a negatively charged phosphate group to create phospholipids (which is hydrophilic). Due to its negative charges, which easily communicate with polar water molecules, the hydrophilic portion of the phospholipid is attracted to water molecules.
What component of phospholipids is drawn to water?A single phospholipid molecule has two consecutive chains of fatty acids that make up the lipid "tails" and a phosphate group, which would be referred to as the "head," on the other end. The negatively charged phosphate group makes the head polar and hydrophilic, or "water loving," in origin. As a consequence, the water is dragged to the phosphate heads.
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Which of the substances have a standard enthalpy of formation (NHf∘) equal to zero?a. C (diamond).b.F2(g).c.NH3(g).d. Hg (l).
Standard enthalpy of production for an isotope in its mean position is 0 by definition. F2(g) F 2 (g) as well as Hg(l) H g (l) are in their fixed positions among the chemicals listed.
What is meant by enthalpy?Enthalpy is a property or condition function that mimics energy; it has the same dimensions as power generation and is thus quantified in kilowatt hours or ergs. The value of hysteresis is solely dependent on the temperature. pressure, and makeup of the system, not on the history.
What is an illustration of enthalpy?The total energy content of such a body the with constant is equal to this enthalpy. You must realize that while energy may take different forms, enthalpy rarely changes.
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if the force of a golf club on a golf ball is 200 n forward, what will the force of the ball on the club be?
Answer:
200N backward
Explanation:
In Newton's third law of motin, every action has equal and opposite reaction
the phosphate of the incoming ribonucleotide is added to the oxygen on which carbon
During RNA synthesis, the 3' hydroxyl (also called as the hydroxyl) of the preceding codon is modified by the phosphatase of an incoming sufficient to amount
What function do phosphates play in the body?Phosphates are necessary for the generation of energy, the operation of muscles and nerves, and the growth of bones. For detecting the phosphate levels in malnourished individuals, ph tests are really quite helpful.
Why is phosphorus useful, and what is it?Phosphate is a naturally occurring form of phosphorous, and makes up 25% of all the minerals necessary for plant growth and maintenance. Phosphorous is a common feature in many goods and is necessary for the production of all fertilizers.
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9 in the chapter, we stated that the nitrile in this reaction is reduced. verify that this is the case by calculating the oxidation state of the c and n atoms of the c{n group before and after the reaction has taken place. does the nitrile gain electrons? if so, how many?
The oxidation state of an atom in a molecule is a measure of the charge it would have if the bonds in the molecule were 100% ionic. To determine the oxidation state of an atom, you can use the following rules:
The oxidation state of an elemental atom in its uncombined state is zero.The oxidation state of a monoatomic ion is equal to its charge.The sum of the oxidation states of all atoms in a neutral compound must be zero.The oxidation state of oxygen is usually -2, except in peroxides where it is -1.The oxidation state of hydrogen is usually +1, except in metal hydrides where it is -1.About AtomThe atom is a basic unit of matter, consisting of an atomic nucleus and a cloud of negatively charged electrons that surrounds it. The atomic nucleus consists of positively charged protons and neutrally charged neutrons (except in the atomic nucleus of Hydrogen-1, which has no neutrons).
The electrons in an atom are bound to the nucleus by electromagnetic forces. A collection of such atoms can also bond with each other, and form a molecule. Atoms containing the same number of protons and electrons are neutral, while those containing a different number of protons and electrons are positive or negative and are called ions. Atoms are grouped based on the number of protons and neutrons contained in the atomic nucleus. The number of protons in an atom determines the chemical element of that atom, and the number of neutrons determines the isotope of that element.
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is the following process spontaneous? a gas condenses to a liquid, releasing heat. group of answer choices no yes not enough information
Yes, the process is spontaneous. When a gas condenses to a liquid, it releases heat, which is a characteristic of a spontaneous process.
This is because during condensation, the gas particles lose kinetic energy and thus release heat to the surrounding environment. The release of heat during condensation indicates that the process is occurring spontaneously, in the sense that it will proceed without any external intervention, such as the input of energy or work. The release of heat during condensation indicates that the process is occurring spontaneously, in the sense that it will continue to proceed on its own, without the need for any external input. In thermodynamics, spontaneous processes are typically associated with an increase in disorder or entropy, as the system moves towards a more disordered state.
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Complete question:
is the following process spontaneous? a gas condenses to a liquid, releasing heat.
A. No
B. Yes
C. Not enough information
True or False: If two substances have all the same physical properties, except for the smell, they could still be the same substance.
Answer:
false
Explanation:
when two substance look the same, but the smell is different then that means the chemical compounds of the substance are different so if their chemical composition is different then the substance is different.
hence proved
Which of the following reduces the number of protons in the nucleus of an atom by 2?
Alpha decay
Beta decay
Electron capture
Gamma emission
Alpha decay is the correct answer .
What is Proton ?
A proton is a subatomic particle that is found in the nucleus (center) of an atom. It is positively charged and has a mass of approximately 1 atomic mass unit. The number of protons in an atom's nucleus is called its atomic number, which determines the element the atom is. For example, all hydrogen atoms have one proton and all helium atoms have two protons. Protons are one of the building blocks of matter and are essential for the stability of atoms. They participate in a variety of chemical reactions, such as those that form molecules, and also play a crucial role in nuclear reactions, such as those that take place in the sun to produce energy.
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nitrogen and hydrogen are fed at 1:3 molar ratio to an ammonia synthesis reactor operating at 1440 r and 100 atm, where the following take place. 25% of the n2 fed is converted to ammonia and the reaction produces 1000 lbmol/h nh3. calculate thevolemtricgas feed rate to the reactor (ft^3/h) at the reactior temp and pressure
The volumetric gas feed rate to the reactor at a temperature of 600C and a reactor pressure of 100 atm is 202.52 ft³/h.
According to the stoichiometry of the given reaction,
N₂ + 3H₂ → 2NH₃
2 moles of ammonia are produced from one mole of nitrogen.
Given that the reactor produces 1000 1bmol/h of ammonia.
So, moles of nitrogen getting converted to the product = 1000/2 =500
Which is just 25 percent of the number of moles of N₂ fed into the reactor.
Thus, moles of nitrogen feed to the reactor per hour = x
25/100 x = 500
x =2000
Thus, 2000 moles of nitrogen are fed per hour to the reactor.
Moles of hydrogen added per hour to the reactor = 3 x 2000 = 6000 mol
Thus, the total number of moles of gases fed into the reactor per hour = (2000+6000) = 8000 mol per hour
Thus, the volumetric flow rate of the gas into the reactor can be calculated by using the ideal gas equation as
PV = nRT
V = nRT/P
V = (8000 mol/h)(0.0821 Latm/molK)(600 + 273)K/100 atm
V = 5733.864 L/h
1 m = 3.281 ft
Thus, 1m³= (3.281)³ At³ = 35.32 At³
Thus, 1 L = 35.32 x10⁻³ ft³
Thus, the volumetric flow rate in ft /h can be calculated as:
5733.864 L/h = 35.32 x 10⁻³ x 5733.864 ft³ /h
= 202.52 ft³/h
Your question is incomplete but most probably your full question was:
Nitrogen and Hydrogen are fed at a 1:3 molar ratio to an ammonia synthesis reactor operating at T = 600 C and P = 100 atm, where the following reaction takes place:
N2 + 3H2 -----> 2NH3
25% of the N2 fed is converted to ammonia and the reactor produces 1000 lbmol/hour of NH3. The reactor operates at steady state. Calculate the volumetric gas feed rate to the reactor(ft^3/hour), at the reactor temperature and pressure.
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provide an acidic or basic environment to optimize digestion
The pH of the stomach is substantially lower than that of any other component of our digestive system, making it a storage area for powerful acids. The conditions here are ideal for enzyme activation.
What aspect of the stomach's environment renders the action inactive?The stomach's pH is typically between 1.0 and 2.0, which is very acidic. Salivary amylase's protein structure denatures and changes form at this pH level. As a result, when salivary amylase reaches the stomach, it is inactive.
Which of the following is required for the activation of stomach enzymes?The high acidity of the stomach contents (pH 1.5 to 3.5) is caused by HCl, which is also required to activate the pepsin protein-digesting enzyme.
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a certain element has only two isotopes. one isotope has a mass number of 69 and an abundance of 60.11%. the other isotope has a mass number of 71 and an abundance of 39.89%. what is the average atomic mass of the isotope? calculate your answer to 4 sig figs and enter only the numeric value (no units)
The average atomic mass of the isotope is 70.64.
Isotopes are different forms of the same element that have the same number of protons but different numbers of neutrons. An element with two isotopes has two distinct mass numbers, and their relative abundances can be calculated based on their molecular masses and their natural occurrences.
In this case, the element has two isotopes: one with a mass number of 69 and an abundance of 60.11%, and the other with a mass number of 71 and an abundance of 39.89%. To calculate the average atomic mass of the isotope, we need to multiply the mass of each isotope with its respective abundance and add them up.
So, 69.0 × 0.6011 + 71.0 × 0.3989 = 41.7069 + 28.9369 = 70.6438.
Therefore, the average atomic mass of the isotope is 70.64 to four significant figures. It's important to note that this value represents the weighted average of the masses of all isotopes of the element and gives an approximation of the average atomic mass of the element in nature.
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