The viscosity of a solution is quadrupled, the rms-average distance of a collection of diffusing molecules from their starting point would be [tex]\frac{1}{2}[/tex] over the same amount of time.
If the viscosity of a solution is quadrupled then the distance of collection of diffusing molecules would be half over the same amount of time. The viscosity of the molecules is dependent on density of the liquid. It is independent to the volume of the liquid.
What is viscosity?Viscosity is measure of a fluid's resistance of flow.
The SI unit of viscosity is Poiseuille (PI) is other units ae newton second per square meter or pascal second. The dimensional formula of viscosity is [[tex]ML^{-1}T^{-1}[/tex]].
The viscosity of liquids decreases rapidly with an increase in temperature, and the viscosity of gases increases with an increase in temperature.
η = [tex]\frac{2ga^{2} (Δρ)}{9v}[/tex]
Where (Δρ) is the density difference between fluid and sphere tested, a is the radius of the sphere, g is the acceleration due to gravity and v is the velocity of the sphere.
Viscosity Types:
Viscosity is the measure of fluid's friction to it's flow. There are two ways to measure the fluid is viscosity is follows:
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Using 1h nmr spectroscopy, how can you tell the difference between an aldehyde and a ketone?.
Using 1h nmr spectroscopy, the difference between an aldehyde and a ketone is predicted as an aldehyde contains two C-H stretches ranging between 2700-2850 cm⁻¹.
What is spectroscopy?Spectroscopy is the study of how light as well as other radiation are absorbed and emitted by materials, and how this depends just on wavelength of that radiation.
Some characteristics of spectroscopy are-
The study of interactions between particles like electrons, protons, and ions as well as their interactions with some other elements as a result of their collision energy has been added to the term more recently.The most fundamental physics theories, such as quantum theory, both special and general theories of relativity, including quantum electrodynamics, have all benefited greatly by spectroscopic analysis. Scientific comprehension of the electromagnetic force together with the strong and weak nuclear forces has been greatly aided by the use of spectroscopy in high-energy collisions.Magnetic resonance imaging (MRI), a medical procedure, uses radio-frequency spectroscopy on nuclei in a magnetic field to produce images of the inside soft tissues of the body with unparalleled resolution.To know more about the spectroscopy, here
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A 500-ml glass beaker is filled to the brim with ethyl alcohol at a temperature of 5. 00ºc. how much will overflow when its temperature reaches 22. 0ºc?
The volume of ethyl alcohol overflow will be 9.265mL.
To calculate the volume of ethyl alcohol overflow, we will use
∆V=V(á∆T)
Where,
∆V=volume expand
á=volumetric expansion Coefficients =0.00109/°C
V=initial volume =500ml
T'=final temp. =22°C
T=initial temp=5°C
Now,
∆V=500×(0.00109/°C) ×(22-5)
=500×(0.00109) (17)
=9.265ml
Thus, we find that the volume of ethyl alcohol overflow will be 9.265 mL.
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In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?
The two ways were,
It showed that atoms can be divided into smaller parts. It showed that all atoms contain electrons.What is Cathode ray tube experiment ?A cathode-ray tube, often known as a CRT, is a vacuum tube that houses one or more electron cannons that produce electron beams that are then bent to produce pictures on a phosphorescent screen. The visuals might be pictures (from a television or computer display), electrical waveforms (from an oscilloscope), radar targets, or other occurrences.
Tomson came to the conclusion that atoms can be divided into their constituent corpuscles (atoms are made up of smaller particles).
The electron was discovered in 1897 by J. J. Thomson.
His "plum pudding" concept from 1904 postulated that the positive charge contains embedded electrons.
With this model, he disproved his first theory (the atom was composed of immaterial vortices).
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Which covenant requires the grantor to execute any necessary legal documents (within his power) necessary to fix title defects discovered after closing?
The covenant of further assurances requires the grantor to execute any necessary legal documents (within his power) necessary to fix title defects discovered after closing.
What Are the Six Covenants of Title?A warranty deed is typically signed by both parties when a seller transfers real estate to a buyer. According to Deed Claim, this document certifies that the seller is the legitimate owner of the property and is selling it free of any liens while transferring the legal title to the buyer. The assurances made by the seller are represented by the six covenants of title. Three covenants are regarded as existing covenants, and as such, they are applicable to the parties to the most recent transfer. The other three are future covenants, and if they are broken, any owner may bring a claim against any prior grantor.
Covenant of Seisin
The seller's rightful ownership of the property is guaranteed by the present covenant of seisin.
No Encumbrances
The seller guarantees that the property is possessed free and clear by making the current covenant against encumbrances.
Right to Convey
According to TheLaw.com, having the right to convey indicates that the seller is legally permitted to transfer the property to the buyer.
Quiet Enjoyment
The future covenant of quiet enjoyment guarantees that a third party's legal claim to title won't affect the buyer's right to possession.
Covenant of Warranty
The warranty covenant and the quiet pleasure covenant are extremely similar.
Further Assurances
This prospective covenant is a guarantee that, should the need ever arise, the grantor will take all reasonable steps to assist the grantee in perfecting the title.
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C2h6(g) o2(g)→ express your answer as a chemical equation. identify all of the phases in your answer
Answer: 2 C2H6(g) + 7 O2(g) → 4 CO2(g) + 6 H2O(g)
Explanation:
Apologies for the error. Let me provide the correct balanced equation for the combustion of C2H6 (ethane) and address your additional question:
1. Combustion of Ethane (C2H6):
C2H6(g) + 3.5 O2(g) → 2 CO2(g) + 3 H2O(g)
To remove the half-coefficient, you can multiply the entire equation by 2:
2 C2H6(g) + 7 O2(g) → 4 CO2(g) + 6 H2O(g)
2. Combustion of Propane (C3H8):
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)
3. Combustion of Butane (C4H10):
C4H10(g) + 6.5 O2(g) → 4 CO2(g) + 5 H2O(g)
In all these reactions, the hydrocarbon (ethane, propane, butane) reacts with oxygen gas (O2) to produce carbon dioxide (CO2) and water (H2O).2C2H6(g)+7O2(g)→4CO2(g)+6H2O(g)
A spherical balloon is inflating with helium at a rate of 48π ft3 min. How fast is the balloon's radius increasing at the instant the radius is 2 ft?
Answer:
Explanation:.
An 80 ev electron impinges upon a potential barrier 100 ev high and 0. 2 nm thick. what is the probability the electron will tunnel through the barrier?
In the above question the probability the electron will tunnel through the barrier is 0.011%.
What do you mean by electron volt?An electron volt is the amount of energy required to move a charge equal to 1e⁻ across a potential difference of 1eV.
To calculate the probability the electron will tunnel through the barrier is calculated as -
Energy of electron
E=80eV
=80×1.6×10⁻¹⁹
=128×10⁻¹⁹
Height of the barrier U=100 eV
=100×1.6×10⁻¹⁹J
Thickness L=0.2×10⁻⁹m
Probability T=e⁻²cl
C=√2m(U-E)/h
=√[2×1.67×10⁻²⁷(160-128)×10⁻¹⁹] / 1.055×10⁻³⁴
=10.34×10⁻²³/1.055×10⁻³⁴
=9.8×10¹¹
2CL=2×9.8×10¹¹×0.2×10⁻⁹
=3.92×10²
T=e⁻²cl
= 1/e⁻³⁹²/¹⁰⁰⁰⁰
=0.0198%
=0.011%
Hence ,the probability the electron will tunnel through the barrier is 0.011%.
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A gas sample at stp contains 1. 20 g oxygen and 1. 43 g nitrogen. what is the volume of the gas sample?
The volume of the gas sample will be 1.79 L.
A liquid, solid, or gas's volume represents the amount of three-dimensional space it occupies. Although there are many additional units that can be used to indicate volume, the most used ones are liters, cubic meters, gallons, milliliters, teaspoons, as well as ounces.
Given data :
Mass of [tex]O_{2}[/tex] = 1.20 g
Mass of [tex]N_{2}[/tex] = 1.43 g
Number of moles can be calculated by suing the formula:
Number of moles of [tex]O_{2}[/tex] = Mass / molar mass = 1.20 / 32 = 0.03 mol
Number of moles of [tex]N_{2}[/tex] = Mass / molar mass = 1.43 / 28 = 0.05 mol
So, the total count of moles can be calculated by :
Total moles = moles of [tex]O_{2}[/tex] + moles of [tex]N_{2}[/tex]
Total moles = 0.03 + 0.05 = 0.08 mol
The volume of the gas at STP can be calculated as:
Volume = 0.08 mol × 22.4 mol/L
Volume = 1.79 L
Therefore, the volume of the gas sample will be 1.79 L.
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How many minutes would be required to produce a mass of 6. 38 g al using a current of 12. 50 amps?
To produce a mass of 6. 38 g al using a current of 12. 50 amps the time required would be 7207.4 minutes.
What is faraday law?It states that the chemical which is getting decomposed because of the flow of current within an electrolyte is directly proportional to the quantity of electricity passing through it.
W= Z × I × t Z = 1 coulomb
I = current
t = time
substituting the values
Z= 96500/Eq.wt
Al 3+ +3e − →Al n= 3
so, Eq= 27 / 3 = 9
t = W × Z / I
t = 9 × 96500 / 12.50
t = 7207.4 minutes.
Therefore the time required would be, 7207.4 minutes.
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How many moles of iron metal are required to react completely with 12 moles of oxygen?
Answer:
16 moles
Explanation:
from the equation:
4Fe + 3O2 -----> Fe2O3
the mole ratio of Fe to O2 follows,
3 moles O2 reacts with 4 moles Fe.
therefore,
1 mole O2 reacts with 4/3 moles Fe
and 12 moles O2 reacts with (4/3) × 12 moles Fe = 16 moles
Answer:
9.0 moles of O2 and produce 6.0 moles of Fe2O3
Explanation:
Fe→Fe3++3e− iron. Is oxidised: it's losing electrons
O2+4e−→2O2− oxygen Is reduced, it's gaining electrons
Balance for the electrons.
The smallest common product of 3 and 4 Is 12.
So we get:
4Fe→4Fe3++12e−
3O2+12e−→6O2−
Adding:
4Fe+3O2+12e−→4Fe3++12e−+6O2−
The electrons balance so they cancel out:
4Fe+3O2→4Fe3++6O2−
Since Fe and O can combine in a ratio of 2:3
4Fe+3O2→4Fe3++6O2−→2Fe2O3
Extra :
Pure iron. won't rust, because the oxide layer would form a protective skin (as aluminium does). It needs some impurities (mainly carbon) and, apart from the oxygen, some moisture -- even carbondioxide 'helps'. In that case iron.-hydroxy-oxides and -carbonates are formed, and these flake, no longer protecting the iron. underneath.
A student weighs out 0. 0422 g of magnesium metal. The magnesium metal is reacted with excess hydrochloric acid to produce hydrogen gas. A sample of hydrogen gas is collected over water in a eudiometer at 32. 0°c. The volume of collected gas is 43. 9 ml and the atmospheric pressure is 832 mmhg. Using the experimentally collected data, calculate r and the percent error.
The R was found to be = 0.6711 L atm/mol.K
The percent error was found to be =18.22 %
How come magnesium is a metal?The three elements that form magnesium a metal are as follows: It effectively conducts electricity. An electropositive element is magnesium. Magnesium has a relatively low ionization enthalpy.
Where can one find magnesium metal?In the crust of the planet, magnesium is the seventh most prevalent element. It is found in huge amounts as magnesite, dolomite, and other minerals but does not naturally occur uncombined.
What applications does magnesium have?Magnesium supports muscle and neuron function as well as energy synthesis in the body, among many other vital functions. Typically, low magnesium levels don't result in any symptoms. On the other hand, persistently low levels can raise your risk of osteoporosis, type 2 diabetes, high blood pressure, and heart disease.learn more about Magnesium here
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What is the molarity of a solution if there are 160.0 g of h2so4 in a 0.500 l solution?
The molarity of the solution is 0.32 M
Calculation,
Molarity of the solution is the total number of moles present in volume in liter.
molarity = number of moles/volume in liter = n/V ...(i)
Number of moles of sulfuric acid = given mass/molar mass
Number of moles of sulfuric acid (n) = 16g/98.079g/mol = 0.16 mole
Volume of the solution (V) = 0.5 L
Putting the value of volume and number of moles in equation (i) we get,
molarity = 0.16 mol/0.5 L = 0.32 mol/L = 0.32 M
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Why is the 6 m naoh solution diluted before titrating the vinegar sample? How might your results be affected if you used the 6 m solution rather than the 0. 3 m naoh?
The 6 M solution NaOH solution diluted before titrating the vinegar sample because pH at the equivalence point changes very rapidly . It is very useful to have dilution solution , so that number of moles that are transferred per drop of the solution is low . So, pH change smaller amount per drop. Having more dilute solution also allows the titration to use volume that is easier to work with.
If you used the 6 M solution was used then the volume required for titration would go down by a factor of 6/0.3 = 20
This means that if a titration took 20ml of the 0.3 M solution then it would take 1ml of the NaOH solution.
Titration consists of adding a controlled and known amount of standard solution with an unknown until the reaction to be complete.
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When an electron in a quantum system drops from a higher energy level to a lower one, the system __
When an electron in a quantum system drops from a higher energy level to a lower one, the system emit a photon.
The energy of the electron drops when it transitions levels, as well as the atom releases photons. The emission of the photon occurs as the electron transitions from an energy state to a lower state. The photon energy represents precisely the energy that would be lost when an electron moves to a level with less energy.
When such an excited electron transitions from one energy level to another, this could emit a photon. The energy drop would be equivalent to the power of the photon that is released. In electron volts, the energy of an electron, as well as its associated photon (emitted or absorbed) has been stated.
Therefore, when an electron in a quantum system drops from a higher energy level to a lower one, the system emit a photon.
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1. One of the uses of methanol, CH3OH (also known as methyl alcohol, wood alcohol and
methyl hydrate), in diluted form is windshield washer antifreeze. In pure form methanol has
a molar concentration of 24.7 mol/L. Using a table from the CRC Handbook of Chemistry
and Physics, a student prepared 8.0 L of 10.0 mol/L aqueous methanol as windshield washer
-30°C. What volume of methanol was necessary to prepare the
antifreeze good for
antifreeze solution?
The volume of methanol necessary to prepare the antifreeze good for antifreeze solution is 3.2 L
Dilution formulaM₁V₁ = M₂V₂
Where
M₁ is the molarity of stock solution V₁ is the volume of stock solution M₂ is the molarity of diluted solution V₂ is the volume of diluted solution Data obtained from the question Molarity of stock solution (M₁) = 24.7 mol/LVolume of diluted solution (V₂) = 8 LMolarity of diluted solution (M₂) = 10 mol/L Volume of stock solution needed (V₁) = ?How to determine the volume neededThe volume of the methanol necessary to prepare the solution can be obtained as illustrated below:
M₁V₁ = M₂V₂
24.7 × V₁ = 10 × 8
24.7 × V₁= 80
Divide both side by 24.7
V₁ = 80 / 24.7
V₁ = 3.2 L
Thus, the volume of methanol necessary to prepare the antifreeze good for antifreeze solution is 3.2 L
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The "break-even" interest rate for year n that equates the return on an n-period zero-coupon bond to that of an n - 1 - period zero-coupon bond rolled over into a one-year bond in year n is defined as:_________
The "break-even" interest rate for year n that equates the return on an n-period zero-coupon bond to that of an n - 1 - period zero-coupon bond rolled over into a one-year bond in year n is defined as the forward rate.
A forward rate is a specified price agreed by all parties involved for the delivery of a good at a specific date in the future. The use of forward rates can be speculative if a buyer believes the future price of a good will be greater than the current forward rate. Alternatively, sellers use forward rates to mitigate the risk that the future price of a good materially decreases.
Regardless of the prevailing spot rate at the time the forward rate meets maturity, the agreed-upon contract is executed at the forward rate. For example, on January 1st, the spot rate of a case of iceberg lettuce is $50. The restaurant and the farmer agree to the delivery of 100 cases of iceberg lettuce on July 1st at a forward rate of $55 per case. On July 1st, even if the price per case has decreased to $45/case or increased to $65/case, the contract will proceed at $55/case.
To extract the forward rate, we need the zero-coupon yield curve.
We are trying to find the future interest rate [tex]{\displaystyle r_{1,2}}{\displaystyle r_{1,2}}[/tex] for time period
[tex]{\displaystyle (t_{1},t_{2})}(t_1, t_2), {\displaystyle t_{1}}t_{1}[/tex] and [tex]{\displaystyle t_{2}}t_{2}[/tex] expressed in years, given the rate [tex]{\displaystyle r_{1}}r_{1}[/tex] for
time period [tex]{\displaystyle (0,t_{1})}(0, t_1)[/tex] and rate [tex]{\displaystyle r_{2}}r_{2}[/tex] for time period [tex]{\displaystyle (0,t_{2})}(0, t_2)[/tex]. To do this, we use the property that the proceeds from investing at rate [tex]{\displaystyle r_{1}}r_{1}[/tex] for
time period [tex]{\displaystyle (0,t_{1})}(0, t_1)[/tex] and then reinvesting those proceeds at rate
[tex]{\displaystyle r_{1,2}}{\displaystyle r_{1,2}}[/tex] for time period [tex]{\displaystyle (t_{1},t_{2})}(t_1, t_2)[/tex] is equal to the proceeds from
investing at rate [tex]{\displaystyle r_{2}}r_{2}[/tex] for time period [tex]{\displaystyle (0,t_{2})}(0, t_2)[/tex].
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a) How would you find the moles of CO2 in a pop? Be sure to describe methods, equipment, and formulas that you would need (10 marks).
b) How would you find the pH of a pop (acid) if you did not have a universal indicator? Be sure to describe methods, equipment, and formulas that you would need (10 marks).
The way to find the moles of CO2 in a pop are:
Write the temperature of the CO2 by adding 273.15 to the number of degrees Celsius.Write the volume of the CO2 container in liters.Write the pressure of the container in atmospheres (atm).Calculate the number of moles of CO2 by the formula n=PV/RTHow to illustrate the information?A mole is a measure of molecules that is equal to approximately 6.022x10^23 molecules. Using the ideal gas formula, one can find the number of moles of carbon dioxide in a container if you know the other needed parameters and conditions.
Based on the above, it should be noted that P is the pressure, V is the volume from, T is the temperature and R is a proportionality constant that is equal to 0.0821 L atm / K mol.
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Given substances f2, kr, cl2 and hbr rank them with respect to the highest boiling point?
The Hbr has highest boiling point followed by Kr , [tex]Cl_{2}[/tex] and [tex]F_{2}[/tex] .
The Hbr has highest boiling point due to presence of intermolecular H-bonding that is hydrogen bonding.
The electronegativity of bromine is greater than hydrogen atom. The electronegativity difference hydrogen atom and bromine atom is high. So, due to this a positive dipole is generated at hydrogen atom and partial negative charge, these partial charge is called dipole. In a HBr molecule one H-atom attracted by Br-atom of another atom by force of attraction and this partial force of attraction is called H-bonding.
Other all given molecules are arrange according to its molecular mass because boiling points is directly proportional to the molecular mass of molecule.
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What atomic or hybrid orbitals make up the sigma bond between c1 and c2 in ethane, ch3ch3 ?
Atomic or hybrid orbitals make up the sigma bond between c1 and c2 in ethane, ch3ch3 are one s orbital and 2 p orbital
Sigma bonds are the most powerful type of covalent chemical link. They are generated by atomic orbitals overlapping head-on. For diatomic molecules, sigma bonding is most readily explained using the language and tools of symmetry groups.
Chemical covalent bonds are sigma bonds and pi bonds. The overlap of atomic orbitals creates sigma and pi bonds. Sigma bonds are produced by overlapping from end to end, whereas Pi bonds are created when the lobe of one atomic orbital overlaps another.
Sigma bonding can be seen in the link between two hydrogen atoms. Sigma bonds are also formed between the sp3 orbitals of hybridized carbon and the s orbitals of hydrogen in methane.
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An increase in blood CO2 or a decrease in blood ph will lead to which change in respiration?
There are three major parts within each dna nucleotide. of these three, which is responsible for the storage of genetic information?
Explain why when an ion is formed, the mass of the atom does not change.
Answer:
Atoms are made up of protons, neutrons, and electrons. The mass of an atom is determined by the total number of neutrons and protons in the nucleus. The difference between an atom and an ion is the number of electrons. The change of electrons does not change the mass because electrons have a negligible mass. In other words, the mass of electrons is so small, it is considered insignificant.
a. True or
b. False:
Nadh and Fadh2 donate electrons to the electron transport chain at the same point.
The statement NADH and FADH2 donates electrons to the electron transport chain at the same point is true.
Aerobic cellular respirationThe third stage of aerobic cellular respiration in living cells is oxidative phosphorylation. It involves the electron transport chain and chemiomosis, two separate processes. In order to create a proton pump (gradient) that will be used to fuel ATP production, the electron transport chain includes the transfer of electrons from one molecule to another.The initial electron donors in the electron transport chain are the reduced electron carriers NADH and FADH2, which are created during the Kreb cycle (the second stage of cellular respiration).In this step NADH and FADH2, donates electrons to the electron transport chain at the same time. Hence, with the above details we can conclude that the given statement is true.
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Why do you add hydroxide to your hexanediamine solution? what would occur if you did not add it?.
In order to react with the hydrochloric acid (HCl) created when the hexanediamine combines with the adiptic acid, NaOH was added to the hexanediamine solution. By combining with the HCl to create NaCl and water, the NaOH preserves the pH of the solution. HCl is taken out of the solution and the reaction is pushed in the direction of the products.
Hexanediamine solutionA C6 alkane-alpha, omega-diamine is hexanediamine. It serves as a xenobiotic metabolite for humans. It comes from a hydride.
Weight in Formula: 116.21Indication: 1,6-NH2(CH2)6NH2Risk Information: CorrosiveDensity: 0.854 (g/mL).Heat of Boiling (°C): 205Temp. Freeze (°C): 39–42Water and Alcohol Are Both Slightly SolubilizedSynonyms include 1,6-diaminohexane and hexamethyleneediamine.Shelf Life: 36 monthsWhat is the purpose of hexanediamine?
Hexanediamine is mostly used to make adhesive resins, resins for paper manufacturing, resins for water treatment, and unaltered resins. Hexanediamine is only used in industrial products; it is unlikely that consumers will come into touch with it.learn more about hexanediamine solution here
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Chemists can use moles to calculate:
A. How much of the products are needed and how much reactant will be made.
B. How much of the reactants are needed and how much product will be made.
C. How much of the reactants are needed, but not how much product will be made.
D. How much product will be made, but not how much of the reactants are needed.
Please Help!!!
[tex] \qquad \qquad \bf \huge\star \: \: \large{ \underline{Answer} } \huge \: \: \star[/tex]
B. How much of the reactants are needed and how much product will be made.
Chemists use mole in calculations to calculate the amount of product that will be formed when certain known amount of reactants are used at the end of reaction.
The moles are used to determine the atoms and molecules in a substance. It is used by chemists to determine the amount of reactants needed and products produced. Thus, option B is correct.
What are moles?A mole is said to be defined as the estimation of the small entities like the atoms as that of the Avagadro's number 6.022 × 10²³. It defines the number of particles contained in a substance.
The moles of the substances are determined by the mass of the substance and its molar mass. The moles are given as,
Moles = mass ÷ molar mass
The moles give the estimation of the amount of the reactants needed to produce the products in a chemical reaction.
Therefore, option B. the moles tell the amount of the reactants required to produce the product.
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How many grams of pbcl2 are formed when 50. 0 ml of 0. 336 m kcl react with pb(no3)2?
2kcl(aq) pb(no3)2(aq) → 2kno3(aq) pbcl2(s)
2.3352 g of PbCl₂ are formed when 50. 0 ml of 0. 336 m KCl react with pb(no3)2.
The balanced equation for the above double displacement reaction is as follows;
2KCl + Pb(NO₃)₂ ---> PbCl₂ + 2KNO₃
Stoichiometry of KCl to PbCl₂ is 2:1
This means that 2 mol of KCl would react with every 1 mol of PbCl₂
The molarity of KCl = 0. 336 M
in 1 L of KCl, there are mol
Therefore in 50. 0 ml of KCl, there are= [tex]\frac{0. 336 * 50}{1000}[/tex]
Number of KCl moles reacted = 0.0168 mol
according to stoichiometry
number of PbCl₂ moles formed = 1/2 x number of KCl moles reacted
Therefore number of PbCl₂ moles formed = 0.0168 mol/2 = 0.0084 mol
molar mass of PbCl₂ = 278 g/mol
mass of PbCl₂ formed = 278 g/mol x 0.0084 mol = 2.3352 g
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A 45. 0 l gas cylinder contains 988 g he at 23 °c. what is the pressure inside the cylinder? (r = 0. 08206 l⋅atm/mol⋅k)
a. 10. 4 atm
b. 533 atm
c. 41. 4 atm
d. 133 atm
e. 101 atm
A 45. 0 L gas cylinder contains 988 g He at 23 °C then pressure inside the cylinder is 134.67 atm.
Calculation,
Formula used :The ideal gas equation is given as,
PV = nRT ....(i)
Where , P is pressure of the gas = ?
V = volume of the gas = 45. 0 L
R = universal gas constant = 0. 08206 L⋅atm/mol⋅K
T = Temperature = 23 °C = 23 + 273 = 299 K
n = number of moles = given mass/ molar mass = 988 g/4 = 247 moles
Putting the value of P , V , T , R and n in equation (i) we get
P×45. 0 L = 247 moles× 0. 08206 L⋅atm/mol⋅K×299 K
P = 247 moles× 0. 08206 L⋅atm/mol⋅K×299 K /45. 0 L = 134.67 atm
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A mass spectrum for propane will have its largest peak at what number? (ie-mass of propane)
A mass spectrum for propane will have its largest peak at 44 number.
Mass spectrum
.An analytical method for determining the mass-to-charge ratio of ions is mass spectrometry (MS). The findings are displayed as a mass spectrum, which is a plot of intensity against the mass-to-charge ratio. Mass spectrometry is utilized in a wide range of disciplines and can analyze both pure materials and intricate mixtures. A visualization of the ion signal as a function of the mass-to-charge ratio is known as a mass spectrum. The masses of particles and molecules in a sample, as well as the chemical identity or structure of molecules and other chemical compounds, are all determined using these spectra.
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If you purchase two new tires rather than four, you should put them on
If you purchase two new tires instead of four, you should put them on the rear means back side.
What should be done if you purchase only two tires?If you are here for a short answer on where the two new tires should be installed, always place the new tires on the rear when buying two tires instead of four. This is because more weight of car comes on the back tires so the new tires should be installed on the back tires of the car.
So we can conclude that If you purchase two new tires instead of four, you should put them on the rear means back side.
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Sodium and bromine form an ionic bond. The resulting compound, sodium bromide, is held together because...
Select one:
a. oppositely charged ions attract.
b. electrons are shared.
c. protons stay in the nucleus.
d. positively charged ions attract.
[tex] {\qquad\qquad\huge\underline{{\sf Answer}}} [/tex]
Sodium is a highly reactive alkali metal and it looses an electron to gain a positive charge on it and bromine is a halogen that is highly resctive as well and it gains a negative charge by doing so.
And hence they form ionic bond, and the compound is held together by the attraction between the two charged ions.
So, correct choice is : A. oppositely charged ion attract.
