A scientist can determine a reaction's exothermicity (or whether it produces heat) using the formula Delta H. (or is endothermic). Delta H generally equals m x s x Delta T, where Delta T is the temperature change caused by the reaction and m is the mass of the reactants.
Is H an endotherm or an exotherm?
When a chemical reaction has a positive H value, it is said to be endothermic; when it has a negative H value, it is said to be exothermic. What does it signify when a process's H value is positive. It indicates an increase in energy for the system hosting the chemical reaction.
What in thermodynamics is H?
H stands for "enthalpy change," Hf for the system's final enthalpy (in a chemical reaction, this would be the enthalpy of the products or the system at equilibrium), and Hi for the system's starting enthalpy (in a chemical reaction, the enthalpy of the reactants).
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how much heat is absorbed or released in the reaction of 20.0 g of nh3 with sufficient oxygen to produce no (g) and h2o (l)?
1062.3 KJ heat is absorbed or released in the reaction of 20.0 g of nh3 with sufficient oxygen to produce no (g) and h2o (l).
The heat absorbed or released in the reaction of 20.0 g of NH3 with oxygen to produce NO and H2O depends on the specific conditions of the reaction and the enthalpy change associated with the reaction.
The general equation for the reaction of NH3 with oxygen to produce NO and H2O is:
4NH3 + 5O2 -> 4NO + 6H2O
The enthalpy change for this reaction, which is the heat absorbed or released during the reaction, can be calculated using the enthalpy changes of formation of the reactants and products. The enthalpy change of formation is the heat absorbed or released when a substance is formed from its elements in their standard states.
The enthalpy change of formation of NH3 is -46.2 kJ/mol, the enthalpy change of formation of O2 is 0 kJ/mol, the enthalpy change of formation of NO is +90.3 kJ/mol, and the enthalpy change of formation of H2O is -285.8 kJ/mol.
To calculate the enthalpy change for the reaction, we can use the following equation:
ΔH = (4 x -46.2 kJ/mol) + (5 x 0 kJ/mol) - (4 x +90.3 kJ/mol) - (6 x -285.8 kJ/mol)
This gives us an enthalpy change of -902.8 kJ/mol.
To convert this to the heat absorbed or released for 20.0 g of NH3, we need to multiply by the number of moles of NH3 used in the reaction. The molar mass of NH3 is 17.0 g/mol, so 20.0 g of NH3 is equal to
20.0 g / 17.0 g/mol = 1.18 moles of NH3.
The heat absorbed or released in the reaction of 20.0 g of NH3 with oxygen to produce NO and H2O is therefore -902.8 kJ/mol x 1.18 moles = -1062.3 kJ.
This means that the reaction absorbs 1062.3 kJ of heat from the surroundings.
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Benzene contains six carbon atoms bonded in a ring. Which best describes these bonds?
A six identical double bonds
B three identical single bonds alternating with three identical double bonds
C six identical bonds, each a hybrid between a single bond and a double bond
D six identical single bonds
B. Three identical single bonds alternating with three identical double bonds
The chemical bonding structure of benzene consists of six carbon atoms bonded together in a ring. In this structure, there are three single bonds and three double bonds, which are arranged in an alternating pattern around the ring. This bond arrangement is known as an aromatic bond and is characteristic of aromatic compounds such as benzene.
It is characterized by its high stability and low reactivity, which are due to the delocalization of the electrons in the ring.
in the following reactions, which species is oxidized? question 15 options: a) cu b) none, this is not a redox reaction. c) fe d) o e) s
In this reaction the oxidation number of hydrogen increases that is oxidation of hydrogen and the reduction of Copper occurs.
What is redox reaction ?Any chemical process in which a participating chemical species' oxidation number changes is an oxidation-reduction reaction, often known as a redox reaction.
It is also clear that this is a reduction reaction because the oxidation number for copper decreases from +2 in Cu2+ to 0 in copper. Since oxidation involves the loss of electrons, 2H2O is oxidized when it loses 4 electrons to create O2.
The given reaction is :
CuO + H₂ = Cu + H₂O
in this reaction the oxidation number of hydrogen increases that is oxidation of hydrogen and the reduction of Cu occurs.
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2.why is the reaction mixture extracted with sodium bicarbonate? give an equation and explain its relevance.
R - CO - OH + NaHCO3 → R - CO-O- Na+ + H20 + CO2
Here Sodium bicarbonate solution is used to neutralize the excess acetic acid and the acid catalyst in the reaction mixture.
In this reaction the product sodium acetate salt is formed which can be easily removed during work up because of its complete solubility in water. The exact reaction is as follows. Baking soda or bicarbonate of soda is the popular term for sodium bicarbonate, which has the chemical formula NaHCO3 and is also known by its IUPAC designation, sodium hydrogen carbonate[9]. A sodium cation (Na+) and a bicarbonate anion (HCO3) combine to form the salt. In spite of frequently appearing as a fine powder, sodium bicarbonate is a crystalline white solid. It tastes similar to washing soda, with a mildly salty, alkaline flavor (sodium carbonate). Nahcolite is a type of naturally occurring mineral. It is a part of the mineral natron and is present in many mineral springs as a dissolved substance. Due to its long history of use and variety of names, including baking soda, bread soda, cooking soda, and bicarbonate of soda, the salt is frequently seen next to baking powder in supermarkets.
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TP is considered to be a high energy molecule. When ATP undergoes hydrolysis to ADP, how much energy is produced?
7.3 kcal/mole is required
14.6 kcal/mole is released
7.3 kcal/mole is released
21.9 kcal/mol is released
Energy-wise, the conversion of ATP to ADP is advantageous, producing -7.3 cal/mol of Gibbs-free energy.
What volume of energy is transferred form ATP to ADP?How is the free energy generated by the ATP hydrolysis utilised for cellular activity, and how much free power is released during this process?One mole of ATP hydrolyzes into Pi and ADP with a predicted G of 7.3 kcal/mole (30.5 kJ/mol).
What occurs when ATP hydrolyzes into ADP?The process of hydrolysis releases energy and transforms ATP into adenosine diphosphate whenever one phosphate group is eliminated by rupturing a phosphoanhydride bond (ADP).
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aleks a chemist must dilute of aqueous potassium permanganate solution until the concentration falls to 179 mm. he'll do this by adding distilled water to the solution until it reaches a certain final volume. calculate this final volume, in liters. round your answer to significant digits.
This final volume, in liters is 0.0285 L.
given that :
molarity M1 = 0.139 M
volume V1 = 0.016 L
molarity M2 = 0.179 M
volume V2 = ?
M1 V1 = M2 V2
V2 = M1 V1 / M2
V2 = ( 0.319 × 0.016 ) / 0.179
V2 = 0.0285 L
Thus, a chemist must dilute of aqueous potassium permanganate solution until the concentration falls to 179 mM. he'll do this by adding distilled water to the solution until it reaches a certain final volume. this final volume, in liters is 0.0285 L.
This question is incomplete , the complete question is :
A chemist must dilute 16 mL of 319 mM aqueous potassium permanganate solution until the concentration falls to 179 mM. he'll do this by adding distilled water to the solution until it reaches a certain final volume. calculate this final volume, in liters.
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Which one of the following is NOT a strong electrolyte? A) LiOH B) HNO3 C) KBr D) NH4CI E)HNO2
Among the given options, formic acid is not an example of strong electrolyte and it is a weak electrolyte and it is a weak carboxylic acid.
Which are not strong electrolytes?
HCOOH is a weak electrolyte. Rest all are strong acids and they completely disassociates into ions.
Is HCl not a strong electrolyte?
Hydrogen chloride is a strong electrolyte, and it dissolves in water completely to form Hydrogen ions and chlorine ions.
Is NH4OH a strong electrolyte?
NH4OH is a weak electrolyte as it is only slightly ionize or dissociates in water. Hence, it does not dissociate completely into ions and value of Kb is low.
What are the 7 weak electrolytes?
Weak Electrolytes and their Examples
Examples of weak electrolytes include acetic acid (CH3COOH), carbonic acid (H2CO3), ammonia (NH3), hydrogen fluoride (HF), hydrogen cyanide (HCN), and pyridine (C2H5N), etc
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a breath of air has a volume of 1.05 l at a pressure of 740. torr and body temperature, 37oc. calculate the number of molecules in the breath
The number of molecules in the breath: 2.71 × 10²² molecules
What is ideal gas equation?PV = nRT denotes the ideal gas equation. In this equation. P stands for the ideal gas's pressure, V for its volume, n for the total amount of ideal gas expressed in moles, R for the universal gas constant, and T for temperature in this equation.
Given that:
Pressure (P) = 740.0 torr
= (740.0/760) atm
= 0.9737 atm
Volume (V) = 1.05 L
Temperature (T) = 3.7°C
= (3.7+273) K
= 276.7 K
find the number of moles using:
P×V = n×R×T
0.9737 atm × 1.05 L = n × 0.08206 atm.L/mol.K × 276.7 K
or, n = 4.5 × 10⁻² mol
Thus, the number of molecules = number of mol × Avogadro’s number
= 4.5 × 10⁻² mol × (6.023 × 10²³) molecules/mol
= 2.71 × 10²² molecules
Answer: 2.71 × 10²² molecules.
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calculate the mass, in grams, of 202 atoms of iron, fe (1 mol of fe has a mass of 55.85 g).
1.87* 10⁻²⁰ grams, or grams, make up the weight of 202 iron atoms. The three fundamental kinds of particles that compose an atom are protons, electrons, and neutrons.
What materials make up atoms?Quarks and electrons are the two primary particle kinds that make up an atom. An atom's nucleus is encircled by an area of electrons. A negative electrical current accompanies every electron. The nucleus of an atom is composed of nucleons, which are constructed from quarks.
Where do atoms come from?Protons, neutrons, or electrons orbit a central nucleus to form an atom. During in the fission process, uranium is broken up into smaller atoms, producing new atoms. The Big Bang and Supernova events illustrate how so many atoms can be produced
Briefing:Number of atoms of Fe (N): 202 atoms
Molar mass of Fe (M): 55.85 g/mol
Avogadro's number: there are 6.02 × 10²³ atoms of Fe in 1 mole of Fe.
55.85 g/mol × 1 mol/6.02 × 10²³ atom = 9.27 × 10⁻²³ g/atom
9.27 × 10⁻²³ g/atom × 202 atom =1.87 × 10⁻²⁰ g
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a voltaic cell is based on the reaction between ag+(aq) and ni(s), producing ag(s) and ni2+(aq).
The overall reaction of the voltaic cell is written as; [tex]Ni(s) + 2Ag^+(aq) ----- > Ni^{2+} (aq) + 2Ag(s)[/tex]
What is a voltaic cell?We know that a voltaic cell is the kind of cell that is obtained when there is a reaction that is spontaneous. It is one of the kinds of electrochemical reactions that we have. We know that the cell potential is positive in this case. The reaction would have a cathode and an anode.
The anode is the point from which current enters into the cell and the cathode is the part of the cell from which current leaves the cell. We would now have to proceed to observe the reaction of the anode and the cathode.
Anode; [tex]Ni(s) ----- > Ni^{2+} + 2e[/tex]
Cathode; [tex]2Ag^+ + 2e ----- > 2Ag[/tex]
Thus the anode of the cell can be seen as the nickel while teh cathode of the cell is the silver. Electrons would move from the nickel part to the silver part of the cell.
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What is the name for CuSO3? a.carbon (II) sulfate b.copper (II) sulfite c.carbon sulfte d.none of these e.copper (I) sulfate Previous
(B) Copper (II) sulfite has the chemical formula CuSO3.
Copper(II) sulfate is the chemical compound CuSO4, although it is also known as blue vitriol, Roman vitriol, the vitriol of copper, and bluestone. Copper sulfate is most frequently found as its pentahydrate, which has the chemical formula CuSO4. 5H2O.
For further information on the chemical name of the compound cu2co3, see its chemical formula. This compound is made up of copper cations (Cu2 ) and carbonate anions (CO3), and as a result is known as copper carbonate and is categorized as a salt.
CuCO is the chemical formula for copper(II) carbonate, also known as cupric carbonate. It is an ionic solid (a salt) that, at room temperature, consists of
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Why is Gold non-reactive?
Metals such as copper, silver, and gold are the least reactive and are at the bottom of the reactivity scale, this is the reason tha gold is non-reacive.
Why is Gold non-reactive?The one electron in the 6s orbital is more closely bonded to the nucleus and has less space to form bonds with other atoms as a result of the contraction of the 6s orbital. The 4f and 5d orbitals expand but cannot participate in bond formation since they are totally filled. This explains why gold is largely inert.
Due to its low reactivity in the reactivity series and its propensity to resist reactions with moisture or air, gold does not corrode. Most acids and oxygen have little effect on gold. Compared to other substances like sulphides or oxides, gold is the most stable.
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What parameter does the detector measure directly? Absorbance b) Total incident light shining on the cuvette (o) c) Light transmitted through the cuvette (Wn) d) Wavelength
Total incident light shining on the cuvette is the parameter that the spectrophotometer's detector measures directly.
A spectrophotometer is a device used to gauge electromagnetic radiation strength at various wavelengths. The spectrophotometer measures the light intensity of a sample by passing a light beam through it. The following are some of the parts of a spectrophotometer:
Light Source: The spectrophotometer needs a light source to produce lights.
Lens collimator:This lens directs the light from the light source to a monochromator or prism.
Detectors: These are photosensitive tools, like photocell detectors, that generate current proportional to the amount of light that strikes them.
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a solution of the amino acid tryptophan has an absorbance at 280 nm of 0.54 in a 0.5 cm cuvet. if the molar absorptivity is 6.4 x 103 m-1 cm-1, what is the concentration of the solution?
1.68×10⁻⁴mol L⁻¹,8.4×10⁻⁵mol/litre is the concentration of the solution
According to the beers - lamberts law:-
A=Ebc------(1)
where,A= Absorbance
E=molar absorbtivity
b=length of the cuvette
c=concentration of the solution
(1) Give that,A=0.54 at d=280mm
b=0.5cm
E=6.4×10³L mol⁻¹cm⁻¹
c=?
∵A=Ebc
c=A/bE
c=0.54/0.5×6.4×10⁻³
c=0.168×10⁻³
c=1.68×10⁻⁴mol L⁻¹
(2) If A=0.3547,E=8435m⁻¹cm⁻¹,b=0.5cm,c=?
c=A/bE
c=0.3547/0.5×8435
c=0.84×10⁻⁴m
c=8.4×10⁻⁵m
so,concentration of the was found to be 8.4×10⁻⁵mol/litre
Concentration in chemistry is defined as the quantity present in a mixture in excess of its total volume. It is possible to distinguish between the four different sorts of mathematical descriptions: mass concentration, molar concentration, number concentration, and volume concentration. Any type of chemical mixture can be referred to by the term "concentration," however solutes and solvents in solutions are most usually mentioned. Osmotic concentration and normal concentration are two variations of the molar (amount) concentration.
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The Lewis diagram for NOBr is: Br The electron-T pair geometry around the N atom in NOBr is There is/are lone pair(s) around the central atom_ So the geometry of NOBr is The Lewis diagram for NOzF is: 6-N=& The electron-pair geometry around the atom in NOzF is There is/are lone pair(s) around the central atom, so the geometry of 'NOzF is Submit Answer Retry Entire Group more group attempt remaining
The molecular geometry of NOBr is bent, and the electron geometry is trigonal planar.
In other words, two atoms are joined together. On the nitrogen, there is only one isolated pair.
What does the term NOBr mean?The chemical compound with the chemical formula NOBr is nitrosyl bromide. It is a red gas that condenses at a temperature that is just below ambient.
N's number of bonds in NOBr is how many.The connection between N and O in nitrosyl bromide contains one sp2 hybrid orbital and one p atomic orbital. Between N-Br and N-O, N in NOBr contains a total of two single bonds.
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identify the compound that has hydrogen bonding. identify the compound that has hydrogen bonding. ch3ch3 hi h2 hf (ch3)3n
The chemical compound HF, or hydrogen fluoride, acts as both a hydrogen donor and acceptor during the process. It exhibits hydrogen bonding because the fluoride is linked to the hydrogen atom in this reaction. Option C is the correct option.
HF molecules are held together by a covalent bond or the strong hydrogen bonding between a hydrogen and a fluorine atom. Given that it contains a potent electronegative ion, fluorine can act as both a hydrogen acceptor and donor. This material exhibits hydrogen bonding as a result.
In chemistry, a hydrogen bond is a relatively strong attraction between an electronegative atom, which is generally the acceptor of the bond, and also an electronegative atom that is covalently bound to a higher electronegative donor atom or group. This attraction is termed to be electrostatic in general.
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Why is NaH a strong base?
When NaH is dissociated, the hydride ion (H) is created, and when NaOH is dissociated, OH is created.
Additionally, the reaction has a very high equilibrium constant, which indicates that the NaH is completely dissociating in water and becoming a strong base.Sodium hydride, often known as NaH or Na+:H-, is the sodium salt of the conjugate base of H2. Strong foundation NaH is very basic, yet it is not nucleophilic. NaH is a base with a broad range of applications in organic chemistry. As a superbase, it may deprotonate a variety of Brnsted acids, including weak ones, to produce the equivalent sodium derivatives.
The goal of NaH [a strong base] is to deprotonate the alcohol, converting it into H2 in the process.
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very small changes in the solute concentrations in the various fluid compartments cause water to move from one compartment to another, which alters blood composition and blood pressure. how do the following physiological changes affect blood pressure?
Blood pressure elevation Vasoconstriction, a rise in salt consumption, and an increase in peripheral resistance increasing blood volume, increasing water absorption, and reducing peripheral resistance
What occurs during vasoconstriction?Vasoconstriction is the process by which tiny muscles in the blood vessel walls narrow (constrain) the blood vessel. Blood flow is hindered or slowed down when blood arteries constrict. There can be mild or severe vasoconstriction. It could be brought on by a medical condition, medication, or psychological issues.
Why does the body constrict its blood vessels?Vasoconstriction is necessary to assist maintain a healthy blood flow also prevent your body from becoming overly cold. Additionally, when necessary, it can elevate blood pressure. In order to promote vasoconstriction, several drugs imitate your body's natural signals.
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point What type(s) of intermolecular forces are present between two molecules of CS2 Check all that apply: Hydrogen bonding London dispersion forces Dipole-dipole attractions
The intermolecular force that are present between two molecules of CS2 is London dispersion forces.
What is intermolecular force?
An intermolecular force is the force that mediates the interaction of molecules, including electromagnetic forces of attraction or repulsion that act between atoms and other types of neighboring particles.
What is London dispersion forces?London dispersion forces are a form of intermolecular force that acts between electrically symmetric atoms and molecules; that is, the electrons are symmetrically dispersed with respect to the nucleus.
The intermolecular force that are present between two molecules of CS2 is London dispersion forces.
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a sample contains 116.9 grams of nacl dissolved in 1.0 l of water. what is the molarity of this solution?
The molarity of a solution of 116.9g of Nacl in 1l water is 2M.
What is molarity of a solution?
A solute's molar concentration is the quantity of that solute in one unit of a solution. It can be measured in mol/L, mol/dm3, or mol/m3. Molarity is the number of moles of solute present per liter of solution
Here,
We know molarity of a solution = moles of solute/litres of a solution
No of moles in 116.9g of nacl=2 (since 1 mole of Nacl=58.5g)
Volume of water= 1l
Therefore molarity of the solution is 2mol/1l= 2M
Hence the molarity of a solution of 116.9g of Nacl in 1l water is 2M.
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NEED HELP ASAP PLEASE ANSWER!!!!! WILL MARK BRAINLEST!!!
4) ₆¹¹ C → ₊ ⁰₁e +¹¹₅ B
The above equation shows positron decay
What is positron decay ?
A specific kind of beta particle (+) is the positron. Another representation of a positron is ⁰₁e
An electron neutrino's symbol is Vе
If the neutron-proton ratio is less than 1:1, or if there are too many protons, the majority of nuclei are unstable. To make up for the imbalance, they will decompose.
The nucleus becomes more stable as a result of positron emission, which raises the proportion of neutrons and lowers that of protons. In positron emission, the mass number A stays constant while the atomic number Z drops by one.
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g what is the equilibrium constant at 298 k for the spontaneous reaction that occurs when a cu2 1cu half-cell is connected to a ag iag half-cell? 0.34 0.80
The standard electrode potential of the connected cell is 0.46. Thus, the equilibrium constant for the spontaneous redox reaction is 1.0.
What is electrode potential?The standard electrode potential of an electrochemical cell is the potential difference occurred between two electrodes. The redox reaction involving oxidation of one species and reduction of another species is taking place at corresponding standard electrode potential of each metal electrodes.
Here, copper metal undergoes oxidation at an electrode potential of 0.34 V and silver metal reduces at 0.80 V. The standard electrode potential of the cell is:
E⁰ cell = E⁰ cathode - E⁰ anode
= 0.80 - 0.34 = 0.46 V.
The relation between E⁰ cell and equilibrium constant K is written as follows:
E⁰ cell = - RT ln K.
thus, at 298 K the equilibrium constant is calculated as follows:
K = ln⁻¹ (0.46 V/ (8.315 × 298 K))
= 1.0
Therefore, the equilibrium constant for the redox reaction is 1.
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Other series of lines were discovered as improvements in spectroscopy made it possible to explore
the infrared and ultraviolet regions. The Paschen series of lines involves energy transitions to the
n=3 state. List the wavelengths and energy levels which are involved in these transitions. In what
region of the spectrum are these lines found?
The Paschen, Brackett, and Pfund series are in the infrared, but the Lyman series is in the ultraviolet.
Where is ultra violet on the spectrum?Along the electromagnetic spectrum, ultraviolet radiation sits between visible light and X-rays. The wavelength range of UV "light" is about between 10 and 400 nanometers.Infrared light or waves are a type of electromagnetic radiation. Every day, people come into contact with infrared radiation, which are invisible to the human eye but which may be felt as heat.The Paschen, Brackett, and Pfund series are in the infrared, but the Lyman series is in the ultraviolet.In general, the electromagnetic spectrum is divided into seven sections, rising in energy and frequency and decreasing in wavelength. Common names for these types of radiation include radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays, and gamma rays.To learn more about electromagnetic spectrum refer,
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a mixture of xenon and helium gases, at a total pressure of 733 mm hg, contains 9.81 grams of xenon and 0.946 grams of helium. what is the partial pressure of each gas in the
The partial pressure (P) Xe = 203 mm Hg & (P) He = 648 mm Hg
According to Dalton's Law of partial pressure , Partial pressure of gas in mixture = X gas ( P total )
Where X gas is mole fraction of gas.
First calculate no. of moles & mole fraction of each gas.
We know that , No. of moles = Mass / Molar mass
therefore No. of moles of Xe ( n Xe ) = 9.81 g / ( 131.30 g /mol ) = 0.074 mol
therefore No. of moles of He ( n He ) = 0.946 g / ( 4.00 g / mol ) = 0.2365 mol
Mole fraction of Xe = Moles of Xe / Total moles of gas = n Xe / ( n Xe + n He )
therefore Mole fraction of Xe = 0.074 / ( 0.074 + 0.2365 ) = 0.2383
Mole Fraction of He = n He / ( n Xe + n He )
therefore Mole fraction of He = 0.2365 / ( 0.074 + 0.2365 ) = 0.7616
Partial pressure of Xe = 0.238 ( 851 mm Hg ) = 203 mm Hg
Partial pressure of He = 0.761 ( 851 mm Hg ) = 648 mm Hg
ANSWER : P Xe = 203 mm Hg & P He = 648 mm Hg
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Classify the compound by family: The compound is carboxylic acid an anhydride an amide an acyl chloride an ester
The compound that is carboxylic acid is highlighted in the image attached.
Carboxylic acid, any of a category of natural compounds wherein a carbon (C) atom is bonded to an oxygen (O) atom with the aid of using a double bond and to a hydroxyl group (―OH) with the aid of using a unmarried bond. A fourth bond hyperlinks the carbon atom to a hydrogen (H) atom or to a few different univalent combining group. Some not unusual place examples of carboxylic acids consist of acetic acid (a element of vinegar) and Formic acid.
Thus, the carboxylic acid is highlighted in the image attached.
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refer again to the graph. in which region is the enzyme saturated with substrate?
Enzyme saturation with the substrate occurs in Region C.
The enzyme is a compound that serves as a catalyst in living things and controls the rate at which chemical processes take place without changing itself in the process.
All biological activities in living things involve chemical reactions, and most of them are controlled by enzymes. Many of these reactions wouldn't occur at an observable rate without the help of enzymes. All facets of cellular metabolism are catalyzed by enzymes. This involves the breakdown of major nutritional molecules (such as proteins, carbs, and lipids) during digestion; the storage and transformation of chemical energy; and the synthesis of cellular macromolecules from smaller precursor molecules. A lack of a specific enzyme is the cause of many inherited human disorders, including albinism and phenylketonuria.
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In the diagram, what is happening to the temperature at Point B?
A. The temperature is rising as the molecules break apart from each other
B. The temperature is rising as the substance melts
C. The temperature is not rising because the heat is being used to break the connections between the molecules
D. The temperature is dropping as the molecules break apart from each other
E. The temperature is not rising because the molecules are slowing down
In the diagram, an activity which is happening to the temperature at Point B is that: C. The temperature is not rising because the heat is being used to break the connections between the molecules.
What is matter?Matter can be defined as any physical object or body that has both mass and takes up space. This ultimately implies that, the mass of a physical object measures the amount of matter the object contains.
What is heat?In Science, heat is sometimes referred to as thermal energy and it can be defined as a form of energy that is transferred from a physical object (body) to another due to a difference in temperature.
By critically observing the diagram, we can reasonably infer and logically deduce that matter has dynamic states depending on the composition of its atoms and at point B the temperature remained constant (not rising) because the quantity of heat generated is used for breaking any form of connection between the molecules.
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Please label she components of a common filter setup and answer the folowing question. All items will be used. Büchner funnel correct. rubber adaptor is item allows twovacuum connection eces of glass to fit gether to form a seal. Büchner f filter flask vacuum connection rubber adaptor unne filter flask What are two uses of a vacuum filtration setup? Select all that apply. crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid storage of a solutionPlease label she components of a common filter setup and answer the folowing question. All items will be used. Büchner funnel correct. rubber adaptor is item allows twovacuum connection eces of glass to fit gether to form a seal. Büchner f filter flask vacuum connection rubber adaptor unne filter flask What are two uses of a vacuum filtration setup? Select all that apply. crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid storage of a solution
The items that are applied to her observations are crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid.
Buchner funnels are used withinside the laboratory for vacuum-assisted liquid filtering. In natural chemistry, those funnels are used to acquire recrystallized compounds due to the fact they assist dispose of moisture from the very last product. A clear out out funnel is a laboratory funnel used for keeping apart solids from beverages thru the laboratory procedure of filtering. In order to obtain this, a cone-like formed piece of clear out out paper is normally folded right into a cone and positioned in the funnel. The suspension of strong and liquid is then poured via the funnel.
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Complete question:
Please label she components of a common filter setup and answer the following question. All items will be used. Büchner funnel correct. rubber adaptor is item allows two vacuum connection aces of glass to fit together to form a seal. Büchner f filter flask vacuum connection rubber adaptor u filter flask What are two uses of a vacuum filtration setup? Select all that apply. crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid storage of a solution.
Which of the following solutions have lowest freezing point
A) 0.1 M NaCl B) 0.001 M Nacl C) 1M Nacl D) 0.001 M Nacl
A solute's solution's molarity directly relates to the freezing point depression; the higher the molarity, the greater the depression. So, as the temperature drops. First, 0.001M NaCl freezes, 1M NaCl freezes.
Molarity: What is it?
The moles of solute every liter of solution is measured as molarity. For instance, when table salt is dissolved in water, both salt and water serve as the solute.
What does a solution's molarity mean?
Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most widely used unit to express solution concentration: liters of solution/moles of solute equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.
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Why is Venus called Earth's "sister planet"?
Venus now and again referred to as Earth's “sister planet” or Earth's twin. It is a terrestrial planet due to comparable size, mass, proximity to the Sun, and bulk composition to the ones of the Earth's.
Venus has lengthy been taken into consideration Earth's dual sister. The planets are very comparable in a few respects and proportion many bodily and orbital characteristics: internal planets. Venus is the second one planet from the Sun. As an indoors planet to Earth, Venus seems in Earth's sky in no way a ways from the Sun, both as morning famous person or night famous person.
Hence, Venus is called Earth's sister planet due to the fact each planets are plenty much like every other.
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