Average atomic and molecular speeds (vrms) are large, even at low temperatures. What is vrms (in...
Average atomic and molecular speeds (vrms) are large, even at low temperatures. What is vrms (in m/s) for helium atoms at 5.00 K, just one degree above helium's liquefaction temperature? _________m/s
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Average atomic and molecular speeds (vrms) are large, even at
low temperatures. What is vrms (in...
Suppose that the average velocity (vrms) of carbon dioxide molecules (molecular mass is equal to 44.0...
Suppose that the average velocity (vrms) of carbon dioxide molecules (molecular mass is equal to 44.0 g/mol) in a flame is found to be 9.39 ✕ 102 m/s. What temperature in kelvin does this represent?
Some incandescent light bulbs are filled with argon gas. What is Vrms for argon atoms near...
Some incandescent light bulbs are filled with argon gas. What is Vrms for argon atoms near the filament, assuming their temperature is 2950 K? The atomic mass of argon is 39.948 u. 1578.9 X The number of grams per mole is numerically the same as the value measured in atomic mass units. How is the root mean square speed related to the temperature of a gas? m/s
8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average...
8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (C:Hg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in each...
3 8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a...
3 8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (CsHg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in...
trans-Cycloheptene (C7H12), a strained cyclic hydrocarbon, converts to cis-cycloheptene at low temperatures. This molecular rearrangement is...
trans-Cycloheptene (C7H12), a strained cyclic hydrocarbon, converts to cis-cycloheptene at low temperatures. This molecular rearrangement is a second-order process with a rate constant of 0.030 M−1s−1 at 60 ∘C. If the initial concentration of trans-cycloheptene is 3.9×10−2 M . Part A Part complete What is the concentration of trans-cycloheptene after a reaction time of 1400 s ? Express your answer to two significant figures and include the appropriate units. 1.5×10−2 M Previous Answers Answer Requested Part B At what time...
A star emits light with a peak wavelength of 9,750 angstroms. What type of star is...
A star emits light with a peak wavelength of 9,750 angstroms. What type of star is this and what is its color? Major stellar spectral types and temperatures Type Color Temperature (K) Comment O Bluish 30,000-80,000 Spectrum with ionized helium and hydrogen but little else; short-lived and rare stars B Bluish 10,000-30,000 Spectrum with neutral helium, none ionized A Bluish 7,500-10,000Spectrum with no helium, strongest hydrogen, some magnesium and calcium F White 6,000-7,500 Spectrum with lonized calcium, magnesium, neutral atoms...
Name CHEM 108 Section KINETIC MOLECULAR THEORY HOMEWORK Part 2 Directions: Answer the following questions, then...
Name CHEM 108 Section KINETIC MOLECULAR THEORY HOMEWORK Part 2 Directions: Answer the following questions, then check your work by completing the kinetic Molecular Theory Homework (Part 1) found in Canvas. You can either accept your grade for the Canvas version or turn this in to your TA at CHEM 108 class on Tuesday. In Activities IV and V. you spent some time learning how to interpret distribution functions and to use them to determine the rms speed of gas...
The interatomic spring stiffness for tungsten is determined from Young’s modulus measurements to be 90 N/m....
The interatomic spring
stiffness for tungsten is determined from Young’s modulus
measurements to be 90 N/m. The mass of one mole of tungsten is
0.185 kg. If we model a block of tungsten as a collection of atomic
“oscillators” (masses on springs), note that since each oscillator
is attached to two “springs,” and each “spring” is half the length
of the interatomic bond, the effective interatomic spring stiffness
for one of these oscillators is 4 times the calculated value given...
I just need help with the practice excersise. a) Large beds of rocks are used in...
I just need help with the practice excersise.
a)
Large beds of rocks are used in some solar – heated homes to store
heat. Assume that the specific heat of the rocks is 0.82 J/g-K.
calculate the quantity of heat absorbed by 50.0 kg of rocks if
their temperature increases by 12.0 degrees Celsius. (b) what
temperature change would these rocks undergo if they emitted 450 kJ
of heat?
per mole undergoes a temperature change of Salve AT = 98...
some context Problem 3: Use simple kinetic theory of gases discussed in section 1.3.2 as well...
some context
Problem 3: Use simple kinetic theory of gases discussed in section 1.3.2 as well as Fourer's law of condustion to prove: 2 R373 D11 = 3113/202pm Dal We were unable to transcribe this imageof a nes. the xed the led negligible The following assumptions about the structure of the cases are made in order to investigate the statistical rules of the random motion of the molecules: The size of the gas molecules is negligible compared with the distance...
Some incandescent light bulbs are filled with argon gas. What is Vrms for argon atoms near the filament, assuming their temperature is 2950 K? The atomic mass of argon is 39.948 u. 1578.9 X The number of grams per mole is numerically the same as the value measured in atomic mass units. How is the root mean square speed related to the temperature of a gas? m/s
8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (C:Hg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in each...
3 8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (CsHg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in...
A star emits light with a peak wavelength of 9,750 angstroms. What type of star is this and what is its color? Major stellar spectral types and temperatures Type Color Temperature (K) Comment O Bluish 30,000-80,000 Spectrum with ionized helium and hydrogen but little else; short-lived and rare stars B Bluish 10,000-30,000 Spectrum with neutral helium, none ionized A Bluish 7,500-10,000Spectrum with no helium, strongest hydrogen, some magnesium and calcium F White 6,000-7,500 Spectrum with lonized calcium, magnesium, neutral atoms...
Name CHEM 108 Section KINETIC MOLECULAR THEORY HOMEWORK Part 2 Directions: Answer the following questions, then check your work by completing the kinetic Molecular Theory Homework (Part 1) found in Canvas. You can either accept your grade for the Canvas version or turn this in to your TA at CHEM 108 class on Tuesday. In Activities IV and V. you spent some time learning how to interpret distribution functions and to use them to determine the rms speed of gas...
The interatomic spring
stiffness for tungsten is determined from Young’s modulus
measurements to be 90 N/m. The mass of one mole of tungsten is
0.185 kg. If we model a block of tungsten as a collection of atomic
“oscillators” (masses on springs), note that since each oscillator
is attached to two “springs,” and each “spring” is half the length
of the interatomic bond, the effective interatomic spring stiffness
for one of these oscillators is 4 times the calculated value given...
I just need help with the practice excersise.
a)
Large beds of rocks are used in some solar – heated homes to store
heat. Assume that the specific heat of the rocks is 0.82 J/g-K.
calculate the quantity of heat absorbed by 50.0 kg of rocks if
their temperature increases by 12.0 degrees Celsius. (b) what
temperature change would these rocks undergo if they emitted 450 kJ
of heat?
per mole undergoes a temperature change of Salve AT = 98...
some context
Problem 3: Use simple kinetic theory of gases discussed in section 1.3.2 as well as Fourer's law of condustion to prove: 2 R373 D11 = 3113/202pm Dal We were unable to transcribe this imageof a nes. the xed the led negligible The following assumptions about the structure of the cases are made in order to investigate the statistical rules of the random motion of the molecules: The size of the gas molecules is negligible compared with the distance...
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