The abbreviations of femtosecond is fs, gigaliter is GI and decimeter is dm.
In order to make them easier to write, the units for the metric system are frequently written as acronyms. The units listed below are abbreviated as follows:
The femtosecond is represented by the symbol fs, where 1 fs is equal to 1015 1015 of a second. A 1015 factor is denoted by the prefix femto-.
The gigaliter is referred to as Gl, and one Gl is equal to 109 109 liters. The prefix giga- denotes a 109 109 factor.
There are 10 decimeters (abbreviated as dm) for every meter, hence the name. 10 is denoted by the prefix deci-.
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initially a mixture contains 0.850 mol of n2 and o2 in an 8.00-l vessel. find the composition of the mixture when equilibrium is reached at 3900 degrees celsius. the equilibrium constant is 0.0123 at 3900 degrees celsius
The composition of mixture when equilibrium is reached is 0.0117M
The equilibrium composition of the mixture can be estimated if the equilibrium constant of a reaction and the concentration of the reactants at the reaction temperature are known.
The concentration of all species at equilibrium, which will not change further, is represented by the equilibrium composition.
The second law of thermodynamics, which stipulates that a closed system has maximum entropy, is used to calculate the composition of the equilibrium.
As soon as the reaction rates and temperature have stabilized adiabatically, the proportion of the reaction products is said to be in equilibrium. The equilibrium constant enables us to determine the reactant and product composition at equilibrium.
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which restriction to the use of the oed vortac would be applicable to the (gnats6.mourn) departure? a. r-295 beyond 35 nm below 8,500 feet. b. r-210 beyond 35 nm below 8,500 feet. c. r-265 within 15 nm below 9,000 feet.
The oed vortac would be applicable to the R-295 departure below 8,500 feet and beyond 35 nm.
What are the purposes of en route low altitude charts?Below 18,000 feet MSL, IFR Enroute Low Altitude Charts offer aeronautical data for navigation under instrument flight rules. This series of four-color charts consists of: Air Traffic Control. airports with a minimum 3000' hard surface runway or an instrument approach procedure.
What is the lowest height at which an autopilot may be engaged while traveling?The heights are above the runway touchdown zone elevation, runway elevation, or airport elevation, as appropriate, for takeoff, approach, and landing. (2) If the AFM does not specify a minimum engagement height, an autopilot may not be employed below 500'above the elevation of the departure airport.
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at 1 atm pressure, the heat of sublimation of gallium is 277 kj/mol and the heat of vaporization is 271 kj/mol. to the correct number of significant figures, how much heat is required to melt 1.50 mol of gallium at 1 atm pressure? at 1 atm pressure, the heat of sublimation of gallium is 277 kj/mol and the heat of vaporization is 271 kj/mol. to the correct number of significant figures, how much heat is required to melt 1.50 mol of gallium at 1 atm pressure? 9 kj 60 kj 6 kj 268 kj 271 kj
The heat is required to melt 1.50 mol of gallium at 1 atm pressure is
The given data as follows :
Ga(s) --> Ga(g) ΔH = 277 kJ /mol
Ga(l) ----> Ga(g) ΔH = 271 kJ/mol
from the given two conditions we can simply subtract the heat of the sublimation to the heat of the vaporization, we get :
Ga(s) -----> Ga(l)
ΔH = heat of sublimation - heat of vaporization
ΔH = 277 kJ/mol - 271 kJ / mol
ΔH = 6 kJ/mol
The heat = nΔH
= 1.50 mol × 6 kJ/mol
= 9 kJ
Thus, at 1 atm pressure, the heat of sublimation of gallium is 277 kJ/mol and the heat of vaporization is 271 kJ/mol. heat is required to melt 1.50 mol of gallium at 1 atm pressure is 9 kJ.
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calculate the mass in grams of iodine (i2) that will react completely with 21.3 g of aluminum (al) to form aluminum iodide (ali3).
312.17 g iodine would react with 20.4 g aluminum completely to form aluminum iodide.
2Al + 3I2 → 2AII3
Mass of aluminum = 21.3 g
Moles of Aluminum = 21.4/ 27g/mol = 0.79mol
The stoichiometric mole ratio of iodine to Al : 3mol I2/2molAl
Moles of Iodine that would react with 0.756 mol Al =
0.79 × 3mol I2/2molAl = 1.23molI2
Mass of iodine = 1.23 molI2 * 253.81gI2/1mol I2 = 312.17g I2
Therefore, 312.17 g iodine would react with 20.4 g aluminum completely to form aluminum iodide.
An amalgam of aluminium and iodine, aluminium iodide is a chemical. The name is invariably used to describe a product with the chemical formula AlI 3, which is produced by the interaction between aluminium and iodine[4] or by the action of HI on aluminium metal. Aluminum hydroxide, hydrogen iodide, or hydroiodic acid react with metallic aluminum to produce the hexahydrate. AlI is related to the compounds chloride and bromide.
The Lewis acid 3, which is potent, will take water from the air. It serves as a reagent in the scission of particular types of C-O and N-O bonds. Additionally, it deoxygenates epoxides and cleaves aryl ethers.
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a 1.513 g sample of khp (c8h5o4k) is dissolved in 50.0 ml of di water. when the khp solution was titrated with naoh, 14.8 ml was required to reach the phenolphthalien end point. calculate the molarity of the naoh solution? khp is a monoprotic acid.
molar mass of KHP ( C8H5O4K)= 8*12+5+4*16+39=204
( atomic weights : C=12, H=1, K=39 and O= 16)
moles of KHP= mass/molar mass = 1.513/204 =0.0074
The reaction between KHP and NaOH is
KHC8H4O4(aq) + NaOH(aq) => KNaC8H4O4(aq) + H2O(l)
1 mole of KHP requires 1 mole of NaOH;
moles of KHP=0.0074
moles of NaOH= 0.0074
concentration of NaOH= moles/ Volume in L, 1000ml= 1L, 14.8ml= 14.8/1000L=0.0148L
concentration of NaOH=0.0074/0.0148=0.5M
The molarity of NaOH is 0.5M
Molar Mass:
In chemistry, the molar mass of a compound is defined as the mass of a sample of that compound divided by the amount of substance. This is the number of moles of that sample measured in moles.
Molarity:
Molarity is used to describe the concentration of a solution. Molarity, also called molarity, is the number of moles of solute (dissolved substance) per liter of solution.
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draw curved arrows to show the mechanism of deprotonation that generates an enolate ion.
The mechanism of deprotonation can be seen by resonance in the enolate ion.
Understanding the location of electrons and being able to draw the curved arrows that depict the mechanisms by which the reactions occur is one of the most critical tools for learning organic chemistry since they allow us to understand what controls reactions, and how reactions proceed.
Before we do this, we need to understand that a bond is due to a pair of electrons shared between atoms. When asked to draw a mechanism, curved arrows should be used to show all the bonding changes that occur.
When the charge shifts from the alpha carbon to the second, it becomes positively charged and the other carbon where the atom has shifted to, it becomes negatively charged.
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identify the indicated hydrogens in the molecules below as pro-r or pro-s.
Two hydrogen atoms must be given prochirality in each of the two chiral centers.
The figure below illustrates all of these details:
Why does hydrogen exist as H2 and not as H?As a result, when two hydrogen atoms bind, they share electrons. The term for this is covalent bonding. In your forthcoming classes, you will receive a detailed introduction to it.
Pro r and Pro s are what?Enantiotopic or diastereotopic atoms or groups on a prochiral center in a molecule are referred to as pro-R and pro-S if one of them is replaced by an achiral ligand with a higher priority than the other in accordance with the CIP rule, converting the prochiral center without affecting the priority of the remaining ligands.
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why was it important to know the solubility of cu2co3(oh)2 in water?
Malachite, Cu2CO3(OH)2(s), is a chemical or pigment that is typically synthesized in solid form, hence understanding its solubility is crucial. it makes sense that it should have an extremely low solubility in water.
A substance's solubility in chemistry refers to its capacity to combine well with another substance—the solvent—to form a solution. The ability of the solute to produce such a solution is required for solubility, which is the opposite attribute.
The concentration of the solute in a saturated solution, a solution in which no more solute can be dissolved, is the standard measurement of the solubility of a material in a particular solvent. The solubility equilibrium is where the two chemicals are at this time. The two substances are referred to as being "miscible in any amounts" when there may not be a limit for some solutes and solvents (or just "miscible").
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a compound composed of 3.3% h, 19.3% c, and 77.4% o has a molar mass of approximately 60 g/mol. what is the molecular formula of the compound?
A substance with a molar mass of around 60 g/mol with a composition of 3.3% H, 19.3% C, having 77.4% O has the chemical formula CH2O3.
Give an example and describe the molecular formula.The molecular formula gives the amount of atoms of each element that make up one molecule of a material, giving the number of atoms of each element per molecule of a substance. It shows an accurate count of each atom within a molecule. Propane, for instance, has the chemical symbol C4H10. According to this formula, the offered chemical consists of 4 carbon atoms and 10 hydrogen atoms.
What is meant by the term "molecular formula"?The number of each object's atoms in a substance's molecules is determined by the molecular formula, which is also known as the "molecular formula." It shows an accurate count of each atom within a molecule. As an example
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Question 13 (1 point) Listen What is the IUPAC name of the compound shown? CH3 -CH 2 -CH-CH3 SH
O 2-thiobutane
O 3-thiobutanol
O 1-methyl-1-thiopropane
O 1-methyl-1-propanethiol
O 2-butanethiol
Question 14 (1 point) 1) Listen Which of the following would be the product of the oxidat pentanol?
The IUPAC name of the compound shown is 1-methyl-1-propanethiol.
As per the naming rules set by the International Union of pure and applied chemistry IUPAC, the name of an organic compound is decided by following a certain set of rules.
First you have to select the longest chain which covers all the branches and functional groups. The functional group will decide the suffix of the name of the compound.
In this compound the functional group is thiol.
And a branch of methyl group is present on the compound.
So as per the IUPAC rules the name of this compound will be 1-methyl-1-propanethiol.
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the concentration of oxygen is being monitored in a reaction flask. the amount of o2 present is found to be 45.0 ppm after 15 s and 40.0 ppm after 25 s. what is the average rate of change of oxygen concentration (in ppm/s) during this time interval?
Time interval during this is 50ppm/s.
What is Rate of change?
The pace of progress capability is characterized as the rate at which one amount is changing concerning another amount. In basic terms, in the pace of progress, how much change in one thing is separated by the comparing measure of progress in another. Allow us to find out about the pace of progress equation with a couple of models eventually.
Pace of Progress: The speed at which a variable changes over a particular timeframe. It is in many cases utilized while talking about energy, and it can commonly be communicated as a proportion between an adjustment of one variable comparative with a relating change in another. Graphically, this proportion is addressed by the incline of a line.
Average Rate = change in time/change in concentration
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a mixture of ideal gases having a total mass of 28.3 g is placed in a 8 l vessel at 275.0 k. the equilibrium pressure is measured to be 1.8 bar. calculate the average molar mass of the gas mixture.
average molar mass of the gas mixture is 45.09 g/mol
Calculation :
We have ,
Total mass = 28.3 g , volume = 8L
Temperature = 275 k , pressure = 1.8 bar
first we have to find mole (Total) of gases .
PV =NRT
(1.77)*(8) = N(total)*(0.082057)*(275K)
N(total) = 0.6276 mole
Now, we know,
(mole) n = mass/molar mass
n (total)= Total mass/average molar mass
Average molar mass = Total mass/n total
= 28.3 g/0.6276 mole
Average molar mass = 45.09 g/mol
In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance. The amount of a substance is the number of moles of that sample measured in moles. Molar mass is mass, not a molecular property of a substance. Molar mass is the average of many instances of a compound, which often differ in mass due to the presence of isotopes. Most commonly, molar mass is calculated from standard atomic masses, so it is a global average and a function of the relative isotopic abundances of constituent atoms on Earth. Molar mass is useful for converting between the mass of a substance and the quantity of a bulk substance.
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Identify each statement as either true or false. Boiling and evaporation are identical processes [ Select ] Vaporization describes the transition from liquid to gas [ Select ] Evaporation can only occur when vapor pressure is equal to atmospheric pressure [ Select] Boiling can only occur when heat is added to a liquid [ Select]
Boiling and evaporation are identical processes - False, Vaporization describes the transition from liquid to gas - True, Evaporation can only occur when the vapour pressure is equal to atmospheric pressure- False, Boiling can only occur when heat is added to a liquid - True
A phase change from the liquid phase to the vapour phase is known as the vaporization (or vaporization) of an element or molecule. Evaporation and boiling are the two different kinds of vaporisation. Boiling is a bulk phenomenon, while evaporation is a surface phenomenon.
Pure bromine in a lab flask, an ephemeral liquid. Evaporation is a phase transition from the liquid phase to vapour (a state of material below critical temperature) that takes place at temperatures below the boiling point at a specific pressure. The surface is where evaporation takes place. Only when a substance's partial vapour pressure is lower than its equilibrium vapour pressure does evaporation take place. For instance, vapour blasted out of a solution will eventually leave behind a cryogenic liquid due to continuously dropping pressures.
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in the movie star wars episode v: the empire strikes back, the character han solo is frozen in the fictional material, carbonite. if carbonite existed, what would be its likely chemical formula?
If carbonite existed, its likely chemical formula will be CO₂²⁻.
The carbonite is liquid substance that is made from the carbon and the oxygen. the carbonite could change in the solid form through rapid freezing. carbonite is used to freeze the good for preservation is called as the carbon freezing. the carbonite is the blasting explosive. so, the carbon freezing is the process in which the liquid carbonite is frozen into the solid state.
Thus, in the movie star wars episode v: the empire strikes back, the character han solo is frozen in the fictional material, carbonite. if carbonite existed, its likely chemical formula will be CO₂²⁻.
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Draw the best Lewis structure for CCl3^-1 What is the formal charge on the C?
According to this, formal charge on C in best Lewis structure of CCl3+1 is +1.
The formal charge is the real charge that an atom carries when it is a part of a bigger molecule or polyatomic ion.
The net overall charge is the consequence of the formal charges on each molecule or ion added together.
For tiny ions, this idea is understandable. It is clear that chloride has a negative charge. Even understanding the negative charge on the hydroxide oxygen is straightforward.
Formal Charge = (# valence electrons on neutral atom) - (# lone electron pairs) + (12 # bonding electrons) Valence electrons = according to group number of periodic table (for representative elements). Lone Pairs are atoms with just one electron in each. One electron makes up a pair, which makes two.
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The frequency of electromagnetic waves is measured in what units? What does this unit mean?
The frequency of electromagnetic waves is measured in Hertz(Hz).
What is Hertz?
Hertz (symbol: Hz) is the frequency unit in the International System of Units (SI), equal to one event (or cycle) per second. Hertz is an SI-derived unit whose expression in SI-based units is s−1, meaning that 1 Hertz is the reciprocal of 1 second [2]. It is named after Heinrich Rudolf Hertz (1857–1894), who was the first to conclusively prove the existence of electromagnetic waves. Hertz is usually expressed in multiples of kilohertz (103 Hz, kHz), megahertz (106 Hz, MHz), gigahertz (109 Hz, GHz), and terahertz (1012 Hz, THz). Some of the most common uses of the device are to describe sine waves and musical tones, especially those used in radio and audio applications. It is also used to describe the clock speed at which computers and other electronic devices operate. Units are also used as a representation of photon energy via the Planck relation E = hν. where E is the photon's energy, ν is its frequency, and the proportionality constant h is Planck's constant.
Therefore, The frequency of electromagnetic waves is measured in Hertz(Hz).
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Use the law of conservation of mass to explain why the equation 2 H2 + O2 = 2 H2O balanced
9) A Full Verbatim file contains: a) Speech errors b) Stutters c) False starts
10) The correct form(s) of affirmation for Full Verbatim is (are): a) Mm-hmm, Mm, uh-huh b) Mh-mm, uh-um, ah-am, uh-uh. c) Mm-hmm, uh-uh uh-huh
A transcript that precisely records every word said by the speakers is referred to as full verbatim. This implies that we include every oh, uh, grammatical error, vocabulary error, false start, repetition, and so on.
Do stutters appear in a full verbatim file?Full verbatim refers to a transcript that accurately captures every word said by the speakers. This means that in addition to false beginnings, slang words, background sounds, stutters, and repeats, we also include grammar and vocabulary problems.
Does a complete verbatim file have filler words in it?The phrase "verbatim" in transcription describes a transcript that includes each and every word from an audio or video clip. Filler words, erroneous sentence structure, grammatical mistakes, and other vocal cues that describe the recording's context.
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what should you expect to observe when the ingredients in an antacid react with hcl to produce h2co3
When antacid reacts with HCl to produce H2CO3 it produce fizzy gas react due to a double displacement reaction.
Table salt and carbonic acid are produced in a two fold displacement process when hydrochloric acid and antacid are combined. Additionally, due to the instability of carbonic acid, it will decompose into water and carbon dioxide, emitting a "fizzy" gas.
Strong acid hydrochloric acid is denoted by the chemical formula HCl. The primary ingredient in antacids is sodium bicarbonate, sometimes known as baking soda and has the chemical formula NaHCO3.
Antacid undergoes a chemical reaction when it reacts as a carbonate with powerful acids like hydrochloric acid to create compounds with a different chemical makeup from the beginning components. Similar reactions will be produced by other carbonates, such as calcium carbonate, which makes up the majority of Tums.
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draw a product of bromination of this alkene. clearly indicate stereochemistry at each chiral carbon by drawing a wedged bond, a dashed bond and two in‑plane bonds.
Alkene is produced during bromination. When pure liquid bromine or bromine dissolved in a solvent such tetrachloromethane is present, alkenes will react with it in the cold.
What exactly does bromination entail?Bromination In a chemical process known as bromination, a compound is subjected to bromination, which adds bromine to the substance. Following bromination, the result will possess traits distinct from the original reactant.
Give me an instance of bromination?An instance of an electron donating aromatic substitution process is benzene's bromination. In this process, the electrophile (bromine) joins the benzene ring with a sigma bond to produce an intermediate. After that, the intermediate undergoes a proton removal to create a substituted ring structure.
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in the late 1800s, mendeleev developed a periodic table of the elements based largely on atomic mass. which development in the early 1900s extended and supported mendeleev's arrangement of elements on the periodic table?
Mendeleev’s periodic table is an arrangement of elements in an increasing atomic mass order in a tabular form.
The elements are arranged in Mendeleev's periodic table in a tabular format, increasing atomic mass order to represent similarities and patterns in the behavior of the elements.
In the beginning, Mendeleev organized the elements in ascending order of atomic weight. Nearby elements with related characteristics are positioned. In the same horizontal row, elements are located that have comparable characteristics.
The gaps that Mendeleev left in his table were one of its distinctive features. He not only anticipated the existence of yet-undiscovered elements within those locations, but also their atomic weights and other properties.
Mendeleev's periodic table organizes the elements according to their atomic mass, meanwhile the Modern Periodic Table does it according to their atomic number. This is the fundamental distinction between the two periodic tables.
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4. Consider the following data: Metal Mass (9 Cu Specilic Heat_Wg % Temperature, 0,900 0.285 these two metals are placed in contact, which of the following will take place? Heat will flow from Al to Cu because Al has Heat will flow larger from specific heat. Cu to Al because Cu has Heat will flow from Cu Io larger heat capacity cause Cu is at a higher temperature. Heat will flow from Cu lo Al because Cu has No heat will Ilow In elther larger mass, direction Calculate the amount of heat liberated "C lo 11.8*C The specific heat (In kJ) from 262 of Cu Is 0.385 Jl 9 %C of copper when cools from 87.0oC to 11,8oC. The specific heat of Cu is 0.365 J/g oC
The heat will flow from copper to aluminum because Cu is at higher temperature. The heat liberated is -7.60kJ
When two metals at different temperatures are kept in contact, heat flows from hotter metal to colder metal until thermal equilibrium is reached.
Here Copper is at a temperature of 60 degree Celsius and aluminum is at 40 degree Celsius. Thus, heat will flow from Cu to Al.
In order to calculate the amount of heat liberated following calculations are required.
m1=262 g
T1=87 oC
Cp=0.385 J/g oC
T2=11.8 oC
The heat liberated can be expressed as follows:
Q=mCp(T2-T1)
Q=262 g*0.385 J/goC(11.8-87)oC
Q=-7585 J
=-7.60kJ
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g a vanadium electrode is oxidized electrically. if the mass of the electrode decreases by 114 mg during the passage of 650 coulombs, what is the oxidation state of the vanadium product?
A vanadium electrode is oxidized electrically. if the mass of the electrode decreases by 114 mg during the passage of 650 coulombs, the oxidation state of the vanadium product is +3.
Given that :
mass = 114 mg = 0.114 g
molar mass = 51 g/mol
charge = 650 C
From the Faraday's law of 53 electrolysis :
Electrochemical equivalent = mass / charge
= 0.114 g / 650 C
= 0.00017 g/C
Equivalent weight = atomic mass / valency = Z × 96485
51 / valency = 0.00017 × 96485
valency = + 3
Thus, the oxidation state of vanadium is +3.
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Classify each molecule as polar or nonpolar. (a) BH3 (b) CHCl3 (c) C2H2 (d) NH3
Polar molecules - NH3 and CHCl3
Non polar molecules - BH3 and C2H2
What are polar and non polar molecules?A polar molecule is one that has one end that is slightly positive and the other end that is slightly negative. A polar molecule is a diatomic molecule with a polar covalent bond.
Non-polar molecules are ones that do not have charges at the end because electrons are finely distributed and symmetrically cancel out each other.
Why NH3 and CHCl3 are polar molecules?NH3- because one end has a positive charge and the other has a negative charge. NH3 is polar.
CHCl3- Because of its tetrahedral molecular shape and the difference in electronegativity of C, H, and CL, CHCl3 is polar.
Why BH3 and C2H2 are non polar molecules?BH3 - a nonpolar molecule. Because of the symmetry of the molecule, the dipole moments of each of the B-H bonds cancel out.
C2H2 - because the electronegativity difference between Carbon and Hydrogen is less than the minimum required.
Polar molecules - NH3 and CHCl3
Non polar molecules - BH3 and C2H2
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Draw the electron configuration for neutral atom of titanlum_ energy
The electronic configuration of the neutral atom of titanium is =
⇒ [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{2}[/tex]
According to the question we need to draw the electron configuration of the titanium neutral atom,
First, let us study the concept of electron configuration.
Electron Configuration -
When the electrons are arranged in the atomic orbitals then the phenomenon is called electron configuration. It shows the number of electrons.Unlike the orbital system, it does not show information on the spin of electrons.We will be deriving the electron configuration of titanium with the help of an orbital diagram.
Orbital Diagram -
Representation of the arrangement of electrons in the atom's orbit.It represents electrons in the arrow form.It also tells about the spin of the electrons.For the filling of the electrons to derive the electron configuration of the Titanium atom we will be using the Aufbau principle -
Refer to the attached file that indicates the orbital diagram for the titanium neutral atom,
The filling of the electrons will be in the order -
⇒ 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s < 4f < 5d < 6p < 7s < 5f < 6d < 7p
Now if we talk about the titanium neutral atom it has a total of 22 electrons,
Therefore, according to the given figure, the electron configuration of the Titanium neutral atom is = [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{2}[/tex]
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If light has a lot of energy; it will have: A) A small frequency B) A small wavelength C) Low speed D) High speed E) A small number of photons
The light has lots of energy then they have small wavelength as energy increase wavelength decreases.
The quantity of strength is without delay proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The better the photon's frequency, the better its strength. Equivalently, the longer the photon's wavelength, the decrease its strength.You have to have observed that the because the frequency increases, the wavelength decreases.
The identical dating exists with one-of-a-kind colored mild waves. You have to be aware the identical connection among the frequency and the wavelength. The frequency of a wave is inversely proportional to its wavelength. That method that waves with a excessive frequency have a quick wavelength, whilst waves with a low frequency have an extended wavelength. Light waves have very, very quick wavelengths.
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C. Magnesium and chlorine
Chemical formula______
Answer:
MgCl²
Explanation:
Magnesium + chloride = MgCl²
which of the following would have a density of 1.21 g/l at 7.0°c and 0.987 atm?
The gas that would have a density of 1.21 g/l at 7.0°c and 0.987 atm is N₂.
The correct option is A.
What is the density of a substance?The density of a substance is given as the ratio of the mass and the volume of a substance.
In order to determine the gas, we must first calculate the molar mass of the gas.
The molar mass of the gas is determined using the Ideal gas equation.
Molar mass = mass/moles
The Ideal gas equation is given below:
PV = nRT
where,
P is the pressure of the gasV is the volume of the gasR is the gas constant = 0.082 atm.L/K/molT is the temperaturen is the number of moles of the gasData given:
P = 0.987
T = 273 + 7 K or 280 K
density = 1.21 g/L
Hence, mass = 1.21 g, volume = 1 L
Solving for n;
n = PV/RT
n = 0.987 * 1 / 0.082 * 280
n = 0.043 moles
Molar mass = 1.21 / 0.043
Molar mass = 28.1 g/mol
This is the molar mass of N₂.
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Complete question:
Which of the following would have a density of 1.21 g/L at 7.0°C and 0.987 atm?
N₂
Ar
Xe
Ne
CO₂
Convert 893 L NH3 to moles.
Answer:
The answer is 17.03052.
Explanation:
I assume you are converting between grams NH3 and mole.
exothermic reaction that has an overall increase in entropy is a) spontaneous only at high t b) spontaneous only at low t c) always spontaneous d) spontaneous in the reverse direction.
Exothermic reaction that has an overall increase in entropy is always spontaneous.
Exothermic reactions are defined as "reactions with a negative total standard enthalpy change ΔH⚬." Exothermic reactions typically produce heat.An exothermic reaction is one that releases energy in the form of light or heat. Thus, in an exothermic process, energy is transferred into the environment rather than taken from it, as in an endothermic reaction. The change in enthalpy ( ΔH) in an exothermic reaction is negative.
As a result, the net amount of energy required to start an exothermic reaction is less than the net amount of energy produced by the process. The net quantity of heat energy that passes through a calorimeter, an instrument used to quantify the heat emitted by a chemical reaction, is equal to the negative of the total energy change of the system.
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Answer:
Explanation: C)always spontaneous
