Q: The depletion of ozone (O3) in the stratosphere has been a matter of great concern among scientists ...
A: 1 mol of NO (g) reacts with 1 mol of O3 (g) to form 1 mole of NO2 (g) and O2 (g).
Q: In the three-dimensional structure of methane CH4 , the hydrogen atoms attached to a carbon atom are...
A:
Q: 4. Terpenes are substances derived from active isoprene or isopropyl pyrophosphate, they are the mai...
A:
Q: Write the chemical equation that represents the dissolving of solid NaCl in water. Include all phas...
A: • we need to write the chemical equation that represents the dissolving of sodium chloride in water.
Q: Assuming that the sample optical path length is 1 cm, find the molar absorptivity at wavelength 1 fo...
A: We know that Absorbance (A)=€Cl ,where €=molar absorptivity C=concentration l=length of the cell ...
Q: 1) The number with the most significant zeros is A) 250000001 B) 0.00002510 C) 2.5100000 D) 0.025000...
A:
Q: Based on the net reactions today, which of the following will be the limiting reagent? Starch O 12 S...
A:
Q: Balance this reaction. If a coefficient is one, enter "1" explicitly. HCl + Ca(OH)2 → H2O + CaC...
A:
Q: a) Write down the anodic and cathodic electrochemical reactions occurring in a Zink (Zn) – Copper (C...
A: Anode is that electrode where oxidation occurs, whereas cathode is that electrode where reduction oc...
Q: hydrocarbon of molecular formula C29H60. Which statement justifies the purpose this coating might se...
A: C29H60 is a hydrocarbon which coats cabbage leaves.
Q: The equilibrium constant, Kp, for the following reaction is 0.215 at 673 K. Calculate K, for this re...
A:
Q: 5. Propose a set of reactions to convert the starting material to the given product. NO2 OMe
A: When nitrobenzene is treated with Sn in presence of HCl, reduction of Nitro group takes place and it...
Q: ОН H2N
A: Concept; Nucleophilicity is inversely proportional to the electronegativity. We know that electrone...
Q: 232.57 g of mercurous sulfate is dissolved in enough water to form an unknown concentration of solut...
A: In case of dilution of any substance the number of moles of substance remain unchanged. No. of mole ...
Q: Chemistry STARTING FROM BENZENE, DEVISE A SYNTHESIS OF THE FOLLOWING COMPOUNDS. НО. CI ОН HO. NO2 HO...
A: the synthesis are as follows:
Q: Draw the resosnance structures of the given charged molecule
A: Answer - Resonance structure - Resonance structures are sets of Lewis structures that describe the d...
Q: References] Obtain the equilibrium constant for the reaction HCN(aq) = H+ (aq) + CN¯(aq) From the fo...
A:
Q: 4 NH3 + 5 O2 → 4 NO + 6 H2O How many moles of oxygen (O2) are needed to produce with 224L of H2O...
A: Given data: The volume of H2O = 224 L
Q: What is the rate constant for this reaction? Do not report units. Report the number with 2 places pa...
A:
Q: CH3OH CH;MgI CO,H -co,CH3 H Etapa 1 Etapa 2 Etapa 3 1) O3 LIAIH4 он он 2) Zn, H2O Etapa 4 Etapa 5
A: In the mentioned question there are continuous change in the functionality, hence IR spectroscopy is...
Q: Using your knowledge of molecular structure, identify the main intermolecular force in the following...
A:
Q: 3 attempts left Check my work Be sure to answer all parts. Equal volumes of 0.220 M AGNO, and 0.200 ...
A:
Q: Which molecule is nonpolar? Question 9 options: CH3Cl CCl4 H2O CH3OH
A: A molecule with net dipole moment is polar in nature whereas those with no net dipole moment is non-...
Q: To a 2Kg sample of wood 80 KJ of heat is added, and its temperature is found to rise from 20oC to 44...
A: The specific heat capacity (S) of a substance is the amount of energy required to raise the temperat...
Q: . explain the results of the experiment Table 1 Absorption Spectrum of Cobalt Chloride Using a Spe...
A: Solution: We know in spectrophotometric/ colorimetric experiment, concentration of the unknown compo...
Q: : A precipitate of PbI, is formed when 5 mL of 0.012 M Pb(NO,), is added to 5 mL of 0.030 M KI. it w...
A: Molarity of lead nitrate = 0.012M Volume of lead nitrate = 5 mL Molarity of KI = 0.030M Volume of KI...
Q: The equilibrium constant, Kc, for the following reaction is 1.92x10-2 at 725 K. 2HI(g) H2(g) + I2(g)...
A: Equilibrium constant, Kc depends on the concentration of reactant and product which are in gaseous s...
Q: The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.64 grams of water. 2C4H10 +...
A:
Q: What is the osmotic pressure exerted at 25°C by an aqueous solution with density 1.107 g/mL that con...
A: Given: Molality of HCl = 1.00 m. Density of solution = 1.107 g/mL. And temperature = 25 oC
Q: e structure c
A:
Q: how does the common ion effect affect the precision or accuracy of lead analysis? an example reactio...
A: In a common ion effect, the concentration of making of that ion will be less.
Q: 1. Write the balanced equation and identify the precipitant that forms when potassium iodide is reac...
A: For potassium iodide & lead II nitrate : The balance chemical equation = ? & The precipita...
Q: Which answer best describes the redistribution of matter or energy when melting takes place? more un...
A: The question can be answered by considering one of the important thermodynamic concept such as entro...
Q: How many gallons of octane, CgH13, having a density of 0.703 g/cm³, would have to be burned to produ...
A:
Q: Use arrow pushing to explain the given reaction
A: In an organic reaction mechanism, a curved arrow represents the transfer of electrons. In an organic...
Q: What is the product of the following reaction? 1) LDA, THF, -78 °C 2)
A: This is an example of cross aldol condensation reaction, where LDA reacts with ketone to form an eno...
Q: 2. Write a synthesis of the Wittig reagent C1
A:
Q: A sample of nitrogen gas is placed into a container at 200 K. If the temperature of the container is...
A: The ideal gas equation P1V1 / T1 = P2V2 /T2 Help to solve the above question.
Q: K =- %3D
A:
Q: 9) Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar? A) Si...
A: 9. Electronic configuration : Na: 1s22s22p63s1 Mg:1s22s22p63s2 P: 1s22s22p63s23P3 Si :1s22s22p63s23P...
Q: Consider the initial-rate data at a certain temperature in the table for the reaction described by 2...
A:
Q: А. ОНС -СООН ОН Но-
A: Concept : CIP rule 1) E/Z system can be assigned based on the CIP rule of nomenclature. 2) E is as...
Q: For a galvanic cell for the following reaction, the cell potential was measured to be 1.56 V. If the...
A: The Standard electrode potential of the redox reaction is given as the difference between the standa...
Q: : A precipitate of PbI, is formed when 5 mL of 0.012 M Pb(NO,), is added to 5 mL of 0.030 M KI. it w...
A:
Q: grams
A:
Q: 6. The mean ionic activity coefficient of CdCl2 in a 0.100 mol/kg aqueous CdCl, solution was determi...
A: The cell representation : Cd(s)|CdCl2(aq 0.100 mol/kg)| AgCl(s)|Ag The half cell reactions : Cd2+...
Q: 3,369 of dia tome gas occupind dia tomic upled a vo lume 2,00 dm3 orcupies at 'an°c of OC and 150 k ...
A: Using ideal gas equation. calculate the number of mole of the gas. Then by using the given mass of g...
Q: Which of the following is not typical of organic compounds? Question 27 options: high melting ...
A:
Q: Oxygen can be produced by the decomposition of mercury(II) oxide, through the following balance equa...
A: According to the given balanced chemical equation, 2 moles of HgO reacts to produce exactly 1 mole o...
Q: en that must be added at 35 C to change the volumetric analysis to 50% of each component.
A: We have, V=3m3 ,P=101kPa,T=35o C+273k=308k,YCH4 =60%100% =0.60YO2 =40%100% =0.40
Step by step
Solved in 2 steps with 2 images
- P7E.1 If the vibration of a diatomic A-B is modelled using a harmonic oscillator, the vibrational frequency is given by w=(k; /u)", where u is the effective mass, µ=m,m,/(m, +m,). If atom A is substituted by an isotope (for example H substituted for 'H), then to a good approximation the force constant remains the same. Why? (Hint: Is there any change in the number of charged species?) (a) Show that when an isotopic substitution is made for atom A, such that its mass changes from m, to m, the vibrational frequency of A'-B, wAp can be expressed in terms of the vibrational frequency of A-B, @ An as o x=0 A (H/H", where u AB and u, are the effective masses of A-B and A'-B, respectively. (b) The vibrational frequency of 'HCl is 5.63 x 10"s". Calculate the vibrational frequency of (i) 'H*Cl and (ii) 'H"Cl. Use integer relative atomic masses. A'BThe spin quantum number of a nitrogen-14 nucleus isI= 1. What would be the nuclear magnetic resonance spectrum for a proton resonance line that was split by interactionwith (a) two. (b) three equivalent nitrogen-14 nuclei?The vibrational frequency of the hydrogen chloride HCl diatomic molecule is 8.97 x 1013Hz. chloride atom is 35.5 times more massive than hydrogen atom. (mµ = 1.67 x 0-27kg,c = 3.0 x 10°m/s) a) What is the force constant of the molecular bond between the hydrogen and the chloride atoms? b) What is the energy of the emitted photon when this molecule makes a transition between adjacent vibrational energy levels? c) What is the wavelength of the emitted photon? d) The possible wavelengths of photons emitted with the HCl molecule decays from the 2nd excited state eventually to the ground state(0 state).
- The Chemistry and Life box in Section 6.7 described the techniquescalled NMR and MRI. (a) Instruments for obtainingMRI data are typically labeled with a frequency, such as 600MHz. In what region of the electromagnetic spectrum doesa photon with this frequency belong? (b) What is the valueof ΔE in Figure 6.27 that would correspond to the absorptionof a photon of radiation with frequency 450 MHz? (c) Whenthe 450-MHz photon is absorbed, does it change the spin ofthe electron or the proton on a hydrogen atom?Ca lcu late the size of the quantum involved in the excitation of (a) an electronic motion of frequency 1.0 x 1015 Hz. (b) a molecular vibration of period 20 Is. (c) a pendulum of period 0.50 s. Express the results in joules and in kilojoules per mole.QUESTION 2 a) State True / False for the following statement and justify your answer. "Since the de Broglie wavelength of a Hz molecule at 300 K is on the order of atomic dimensions that all properties of H2 are quantized." b) A traveling wave with arbitrary phase o can be written as Y(x, t) = A sin(kx – wt + $). i) State the unit of ø. ii) Show that o could be used to represent a shift in the origin of time or distance. Given that: Y(x) = wave function at point x and time t k = wave number A = amplitude @ = angular frequency
- Which of the following transitions are allowed in the electronic emission spectrum of an hydrogenic atom:(a) 2s →1s. (b) 2p → 1s. (c) 3d → 2p. (d) 5d → 2s. (e) 5p →3s. (f) 6f → 4p?In Example 20.4, we determined that the moment of inertia of the NaH molecule is 5.70 × 10-47 kg m2.(a) Calculate the relative population of the J =5 level andthe ground state at 25°C.(b) Calculate the relative population of the J = 15 leveland the ground state at 25°C.(c) Calculate the relative population of the J = 25 leveland the ground state at 25°C.Singly-ionized carbon atoms are accelerated through 1050 V and passed into a mass spectrometer to determine the isotopes present. The magnetic field strength in the spectrometer is 0.180 T. (a) Determine the orbital radii for the 12C and 13C isotopes as they pass through the field. cm (12C) cm (13C) (b) Show that the ratio of the radii may be written in the form m1 = V by verifying that your radii in part (a) satisfy this formula. m1 m-
- Photoelectron spectroscopy studies of silicon atoms excited by X-rays with wavelength 9.890 × 10-1º m show four peaks in which the electrons have speeds 2.097 × 107 m s-!, 2.093 x 107 m s-!, 2.014 × 107 m s', and 1.971 x 107 m s-1. (Recall that 1 J = 1 kg m² s-2.) (a) Calculate the ionization energy of the electrons in each peak. (b) Assign each peak to an orbital of the silicon atom.P7E.5 In infrared spectroscopy it is common to observe a transition from the v = 0 to v = 1 vibrational level. If this transition is modelled as a harmonic oscillator, the energy of the photon involved is ħo, where o is the vibrational frequency. (a) Show that the wavenumber of the radiation corresponding to photons of this energy, v, is given by v=@/2nc, where c is the speed of light. (b) The vibrational frequency of 'H*Cl is w = 5.63 x 10“s"; calculate v. (c) Derive an expression for the force constant k, in terms of v. (d) For "C"O the v = 0 →1 transition is observed at 2170 cm. Calculate the force constant and estimate the wavenumber at which the corresponding absorption occurs for "C*O. Use integer relative atomic masses for this estimate.Strontium has a ground state configuration of 5s electrons, from the excitation of electron in the 5p as (5s15p1 ) and in the 3d subshell as 5s1 4d1, determine the terms and levels for these two excited configurations. Selection rules: (a) ΔS = 0, (b) ΔL = 0, ±1, (c) ΔJ = 0, ±1 (except for J = 0 → J = 0).