Ultraviolet light with a wavelength longer than about 284.6 nm has little germicidal value. What is the frequency (in Hz) that corresponds to this wavelength?

Q: A sealed, evacuated tube containing KCl and a small amount of potassium was exposed to a Tesla coil…

A: Tesla coil is a radiofreequency oscillator to produce high voltages. The spark from the Tesla coil…

Q: Wavelength of visible light determines color. True False

A: The wavelength  of visible light determines the color of substance that the light appears. Light…

Q: What is the diagonal effect? What is the basic reason for the diagonal relation of elements? Which…

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Q: Using data from Problems 13 and 15, calculate the aver- age distance of the electron from the…

A: The Zeff (1s) for hydrogen atom is 1 The Zeff (2s) for lithium atom is 1.28 The Zeff (3s) for sodium…

Q: What would you expect the observed colour of a solution to be, Whose maximum wavelength of…

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Q: Predict the trend in values of Slater's  constant of the every first element of each group of p…

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Q: 1.Which compound is used in respirators since it reacts with CO2(g) to produce O2(g)? a.RbO2 b.CsO2…

A: The compound which converts carbon dioxide into oxygen and makes respiration easier will be used in…

Q: A naturally occurring fblock element, M, forms an anionic nitrate [M(NO3)6]² , M(acac)4 and an oxide…

A: Those elements of the periodic table which have their last electrons in the f-orbital are known as…

Q: 9. The LabQuest SpectroVis spectrophotometer is used to measure the intensity of a light source…

A:

Q: Calculate the energy (in eV) of the process: Br(g) + Na(g) → Br- + Na . Data: Ionization energy of…

A: The given process involves the ionization of gaseous sodium atom to sodium ion and gain of electron…

Q: What is the maximum wavelength capable of breaking a C=C bond with a bond strength of 614 kJ/mol?

A: Here we are required to find the wavelength capable of breaking a C=C bond with strength of 614…

Q: Suppose that absorbances of several solutions were measured at 520nm. What is the frequency of this…

A: Given :  Wavelength= 520 nm  Plank's constant (h) = 6.626 x 10-34 J-s

Q: out of s,p,d,f orbitals which has maximum shielding effect?

A:

Q: Calculate the fraction of atom sites that are vacant for silver at 687°C. Assume an energy for…

A: Given,  Temperature = 687◦c Energy for vacancy formation = 0.63 eV / atom

Q: Hg^2+orbital filling diagram

A: Orbital filling diagram is mainly used to observe quantum numbers available in electronic…

Q: false?

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Q: If Zeff for the Na 3s orbital is 2.51, while for the Mg 3s orbital it is 3.31, by what ratio do you…

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Q: الفصل الأول 20_1 The reddish brown color of NO2 molecule is probably due to Presence of an unpaired…

A: Given The reddish brown color of of NO2 molecule is probably due to a. Presence of an unpaired…

Q: Compute the ionization potential for five-times ionized (Mg11+) and also compute the wavelength of…

A: In the ground state , electron in Mg11+ present at n = 1   energy of electron in Mg11+ =…

Q: Light of frequency 1.05 x 10^15 Hz. What is the ionization energy in J-mol-1

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Q: What is the energy difference between the 3s and 3p orbital in sodium?

A: while filling the electron , we follow (n+l) rule, for orbital which has more (n+l) value is placed…

Q: In a future hydrogen-fuel economy, the cheapest source of H₂ will certainly be water. It takes 467…

A: The energy of the photon that can be related to the frequency is furnished as follows: E=hν…

Q: How can I show the relevant steps to calculate Deltaf H degrees of MgCl(s) given the following data:…

A: Need to calculate Deltaf H degrees of MgCl(s)

Q: Light of wavelengths shorter than 275 nm can be used to photodissociate the hydrogen molecule into…

A: Given the volume of the glass cylinder, V = 50.0 mL * 1L1000 mL= 0.050 L Pressure, P = 50.0 mtorr P…

Q: Relate the energies of the orbitals found (these we will use for building Molecular Orbital energy…

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Q: Write the electron configuration of Gallium (atomic number 31). Give the four quantum numbers for an…

A: We have to write the electron configuration of Gallium (atomic number 31) and also  we have to give…

Q: In the ground state electronic configuration of Co (atomic number 27), how many total shells,…

A: Co has an atomic number of 27 so it contains 27 electrons. The electronic configuration of Co can be…

Q: For potassium chloride (KC1), calculate the radius ratio to show why the compound has the cesium…

A: Well, we know we can calculate the radius ratio by using the formula-Based on radius ratio we have…

Q: Use condensed electron configurations to predict the relative hardnesses and melting points of…

A: Condensed electronic configuration is written for elements of higher atomic number. It is written in…

Q: Calculate the energy in kJ of 0.0130 moles of photon of light with wavelength of 640 nm. h = 6.626 x…

A: Correct Option :  2.43 kJ

Q: A N atom has a shielding constant of 3.17 What is the nuclear charge of a valence electron in a N…

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Q: The ion M 2+ has 3 unpaired 3d electrons in the ground state.  If M is in the first row of the…

A: The two metals ions are  V+2 and Co+2  , i.e vanadium ion and cobalt ion.

Q: Pt^2+orbital filling diagram

A: Orbital filling diagram of Pt2+:

Q: Which main theory did Compton use to explain electron scattering from the metal target?

A: We need to answer Which main theory did Compton use to explain electron scattering from the metal…

Q: Why An inscribed polygon is also called a Frost circle ?

A: In an aromatic ring, frost circle is used to show the energies of molecular orbitals of the…

Q: Write the ground state electron configurations for: Mn2+ Au3+ Mo6+ `

A: The objective of this question is to determine the ground state electron configurations for the ions…

Q: A few different types of electromagnetic radiation are listed in the wavelength, and energy per…

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Q: P^3- orbital filling diagram

A: Orbital filling diagram is a way to represent the arrangement of electrons in a particular atom.  It…

Q: What is the electron configuration for Br? O [Ar]4s23d104pć 6 [Ar]4s²3d104p5 [Ar]4s²4p6…

A: The distribution of electrons of an atom is  the electron configuration of that atom. It is also…

Q: ) Estimate the atomic radii (in nm) of silver and vanadium (compare the estimates with the reported…

A:

Q: which of the following does have the lowest polarizability? Z of I=53, F=9. Br=35, Cl=53

A: 1- The polarizability of the atom it's depends on the electronegativity of element.  More…

Q: Which is the correct depiction of the electron transfer of Na and Cl? • Na.

A: Here, we have to find the correct depiction of the electron transfer of Na and Cl.