Q: calculate the pH of the following solution; (a)2.8 × 10–⁴M Ba (OH)2 (b) 5.2 × 10–⁴M HNO3·
A: The given data : a) The concentration of Ba(OH)2 = 2.8×10-4 M b) The concentration of HNO3 = 5.2×10-...
Q: The total weight of a mixture containing CaO and BaO is 0.6411 g, and the weight of anhydrous sulpha...
A: The total weight of CaO and BaO is 0.6411 g. The total weight of anhydrous sulphate salts obtained f...
Q: 8. Choose the best sequence that would accomplish the following transformation. SO,H 1. X 2. Y Br A....
A: First benzene reacts with SO3/H2SO4 to give benzene sulphonic acid. This process is called Sulphona...
Q: A mixture of species of A, B, and C is injected into a liquid chromatographic column with length of ...
A: Selectivity factors measure as the distance between two chromatography peak. Retention factor (k) ...
Q: solve k, l, m
A: k) Oxalic acid/Ethanedioic acid = The structure of the given compound is,
Q: The reason for the development of polycrystalline material is because ( one sentence only)
A: Answer - polycrystalline material - A polycrystalline material is comprised of many small crystallit...
Q: Define and explain the importance of water source.
A: Water: Chemically, water can be defined as the inorganic liquid that has the molecular formula H2O. ...
Q: 2. Define shielding and effective nuclear charge. What is the connection between the two?
A: At the nucleolus positively charged protons are present. Hence, nucleolus attracts the negatively ch...
Q: Illustrate the structure of the following fatty acids according to their saturation1. Linoleic acid2...
A: Fatty acids are generally long-chain carboxylic acids. Fats are generally formed of fatty acids. Fat...
Q: If lactose is first hydrolyzed (by addition of sulfuric acid) into its constituent monosaccharide, a...
A: The product which is formed If lactose is first hydrolyzed and then subjected to complete methylatio...
Q: the final hydration product of acetylene (ethyne) is: a) Formic aldehyde b) Aldehyde acetic c) Formi...
A: Hydration reaction is a chemical reaction in which a substance combines with water. In organic chemi...
Q: The radical step with least bond dissociation energy will be:
A: The energy required to break the bond between two atoms is called bond dissociation energy. The more...
Q: Define biomagnification. Explain how the use of DDT has led to a population explosion of rats?
A: Biomagnification : Biomagnification expands as Biological Magnification, which is defined as an incr...
Q: 1. (a) 5.00g of caffeine is found to contain 2.47g of carbon, 0.26g of hydrogen, 1.44g of nitrogen a...
A: Given: The mass of carbon=2.47 g. The mass of hydrogen=0.26 g. The mass of nitrogen=1.44 g. The mass...
Q: Identify the solid product formed from the balanced reaction of silver nitrate and calcium chloride.
A: Silver nitrate is denoted by AgNO3. Calcium chloride is denoted by CaCl2.
Q: _____How does increasing temperature affect the collisions of reactant molecules in a chemical react...
A: The higher temperatures mean higher velocities. This means there will be less time between collision...
Q: d) Calculate the atom economy for Ethylene Oxide (CH;CH2O) preparation CH2=CH2 + Cl2 +H2O CICH,CH2OH...
A: Atom economy - It is a measurement of the amount of starting materials (reactants) that end up as th...
Q: 8. A solution with a pOH of 4.3 has a [H+] of O A. 6.8 x 10A-9 M. B. 3.2 x 10A-4 M. C. 4.8 x 10^-5 M...
A: To calculate the pH of an aqueous solution you need to know the concentration of the hydrogen ion in...
Q: The following data are from the HPLC assay of paracetamol 500 mg tablets using the calibration curve...
A: HPLC stands for High-Performance Liquid Chromatography. It is a technique that is used to separate a...
Q: Hello, can you help me with this question? Please make sure your answer is not wrong. Thank you.
A: A polar compound always has stronger attraction as in polar compounds they are separated by charge w...
Q: write a mechanism for the Pollow ing ) HzO, solvolysis A Na H OCHS 3) CH3I write a detailed synmesis...
A: We only answer one question from multiple questions. Please resubmit the other questions separately ...
Q: A chemical reaction requires 369.42 kJ of heat and performs 73.7 kJ of work on the surroundings. Wha...
A:
Q: What is the product of the following two-step reaction sequence? Hint: count carbons! он он (a) (b) ...
A: The given compound is 3-oxohexanoic acid which is a β-keto carboxylic acid. NaBH4 is sodium borohydr...
Q: I need help answering this question
A: Combustion is a chemical reaction. It’s a technical word for burning. In this, a substance reacts wi...
Q: Upon reaction of 1.27 gof copper sulfate with excess zinc metal, 0.460 g copper metal was obtained a...
A: Percent yield is defined as the ratio of actual yield by theoretical yield multiplied by 100. Actual...
Q: How many grams of SO3 are produced when 20.0 g FeS, react with 16.0 g O2 according to this balanced ...
A: Stoichiometry gives the relationship between the amount of reactants and products in a balanced chem...
Q: name the esters d, e, f, g, h
A: In this question We are asked to give name of the esters of given structures.
Q: Using Slater’s rules, determine Z * for a 3p electron in P, S, Cl, and Ar. Is the calculated value o...
A: To find: Using Slater's rule,Z* find the Z* of P,S,Cl,Ar
Q: a chemist is preparing a solution of NaCl He used 250 mL of 0.250 M NaCl solution and diluted it wit...
A: given; volume of NaCl, V1 = 250mL [NaCl], M1 = 0.250 M volume of water added = 500mL new concentrati...
Q: How many grams of SO3 are produced when 20.0 g FeS2 react with 16.0 g O2 according to this balanced ...
A: The answer to the following question is- Reaction : 4 FeS2 + 15 O2 -----> 2 Fe2O3 + 8 SO3
Q: ) Calculate the % by mass C in C4H8O
A: % by mass of C in C4H8O = (mass of C/mass of C4H8O) × 100%
Q: Write the reactions in which propine and propene act with one of the following compounds. a) KMnO4 s...
A: Propene here reacts with KMnO4 to form a diol. ( Addition of two OH groups accross the double bond) ...
Q: Chemistry Question
A: The question is related to finding out the final pressure in the tank. First read all the given info...
Q: + Assignment 1.docx 2- Name the following lipid structures: он a- OH CH3 b- ...
A: a) The IUPAC name of the given lipid is, Icosa-5,8,11,14,17-pentaenoic acid.
Q: Which of the following gases is expected to have the fastest rate of effusion? a. CO2 b. CH4 c. NO2 ...
A: The rate of effusion for a gas is inversely proportional to the square root of its molecular mass.
Q: What is the molar concentration od Aki's disinfectant if she dissolved 5Tbsp of NaCIO in 3.8 liters ...
A: The molarity is defined ad the number of moles of solute per liter of the solution. It the common wa...
Q: When is a resonance hybrid needed to adequately depict the bonding in a molecule? Using NO2 as an ex...
A: Resonance structures are a bunch of two or more Lewis Structures that on the whole portray the elect...
Q: What the Carbohydrates?
A: A macronutrient that is present in a number of food items and drinks is carbohydrates. Basically, sp...
Q: Say whether you think it is possible to measure the wavelength of a golf ball in flight.You should s...
A: Yes, it is possible to measure the wavelength of a golf ball in flight. Formula : E = mc2m = mass o...
Q: Calculate the mole fraction of the solute in the solution: 25 g of Cl2 in 125 g of dichloromethane (...
A: The given example is binary solution. Chlorine gas is the solute and dichloromethane is the solvent....
Q: please help me
A: Isomers are the pair of chemical compounds which have the same molecular formula but different struc...
Q: Why do we need to determine the particle population and average particle size of a sample by the cas...
A: Sample preparation is an important step in the process of analysis. Each analytical method is char...
Q: One can make a silver penny by plating silver onto older (pre-1982) copper pennies according to the ...
A: Before doing the question, one has to know what is yield. yield is the percentage ratio of the obser...
Q: Given the following data for Mass of test tube and stearic acid = 14.17 gMass of test tube = 11.40 g...
A: Given in the question, Mass of test tube and stearic acid = 14.17 gMass of test tube = 11.40 gFreezi...
Q: 1. A type of a cell used as a source of electrical energy. A.cell dimension C. voltaic cell E. elect...
A: Hey, since there are multiple questions posted, we will answer first question. If you want any speci...
Q: 21.22 Write the cell notation for the voltaic cell that incorporates each of the following redox rea...
A: When a chemical reaction is represented in short form that is taking place in an electrochemical cel...
Q: Hello, can you help me with this question? Please make sure your answer is not wrong. Thank you.
A: Please find the attachment
Q: Hello, can you help me with this question? Please make sure your answer is not wrong. Thank you.
A: To compare the boiling point and solubility of: (a) Ammonia, NH3 and methane, CH4 (b) Pentanol, C5H1...
Q: Hyperkeratosis disease comes as a result of
A: The outer layer of skin is made up of tough and protective protein which is commonly known as kerati...
Q: help
A: 4. Given types of isomers, Structural isomers Geometric isomers Optical isomers
Step by step
Solved in 2 steps
- In a FranckHertz experiment on sodium atoms, the first excitation threshold occurs at 2.103 eV. Calculate the wavelength of emitted light expected just above this threshold. (Note: Sodium vapor lamps used in street lighting emit spectral lines with wavelengths 5891.8 and 5889.9 Å.)A carbon dioxide laser produces radiation of wavelength 10.6 micrometers (1micrometer=106meter). laser produces about one joule of energy per pulse, how many photons are produced per pulse? (c) Which transitions involve the ground state? (d) Which transition absorbs the most energy? (e) Which transition emits the most energy?Chapter 3 introduced the concept of a double bond between carbon atoms, represented by C=C , with a length near 1.34 Å. The motion of an electron in such a bond can be treated crudely as motion in a one-dimensional box. Calculate the energy of an electron in each of its three lowest allowed states if it is confined to move in a one-dimensional box of length 1.34 Å. Calculate the wavelength of light necessary to excite the electron from its ground state to the first excited state.
- Consider an electron for a hydrogen atom in an excited state. The maximum wavelength of electromagnetic radiation that can completely remove (ionize) the electron from the H atom is 1460 nm. What is the initial excited state for the electron (n = ?)?Consider burning ethane gas, C2H6 in oxygen (combustion) forming CO2 and water. (a) How much energy (in J) is produced in the combustion of one molecule of ethane? (b) What is the energy of a photon of ultraviolet light with a wavelength of 12.6 nm? (c) Compare your answers for (a) and (b).6.103 Atomic absorption spectroscopy is based on the atomic spectra of the elements being studied. It can be used to determine the impurities in a metal sample. If an element is present, light at the appropriate wavelength is absorbed. You are working with a metal stamping company and the rolled steel you use to form panels for automobile doors is failing at an alarming rate. There is some chance that the problem is unacceptably high levels of manganese in the steel. Given that the atomic spectrum of manganese has three lines near 403 nm, how could you use a spectrometer to determine the amount of manganese in the steel?
- Using Table 5.2, write down the mathematical expression for the 2px wave function for an electronically excited H atom. Estimate the probability of finding the 2px electron if you look in a cubical box of volume of 0.8(pm)3 centered at a distance of 0.5001010m in the =/2 , =0 direction. Does this probability change as you change ? At what angles is the probability of finding the electron smallest and at what angles is the probability the largest? (Note that =2 is the same location as =0 , so don’t double count.)What are the values of E, L, and Lz for an F8+ atom whose electron has the following wavefunctions, listed as n,l,ml? a 1,0,0 b 3,2,2c 2,1,1d 9,6,3.Consider the following transitions 1. n=3 to n=1 2. n=2 to n=33. n=4 to n=34. n=3 to n=5(a) For which of the transitions is energy absorbed? (b) For which of the transitions is energy emitted? (c) Which transitions involve the ground state? (d) Which transition absorbs the most energy? (e) Which transition emits the most energy?
- In two-photon ionization spectroscopy, the combined energies carried by two different photons are used to remove an electron from an atom or molecule. In such an experiment, a K atom in the gas phase is to be ionized by two different light beams, one of which has a 650-nm wavelength. What is the maximum wavelength for the second beam that will cause two-photon ionization?Based on the trend shown in Figure 11.5, draw the probability distribution of a harmonic oscillator wavefunction that has a very high value of n. Explain how this is consistent with the correspondence principle.