Calculate the energy of blue light that has a wavelength of 400 nm. 3 significant figures

Q: How many grams of phosphine (PH3) can form when 12.9 g of phosphorus and 75.3 L of hydrogen gas reac...

A: Reaction's stoichiometry plays an important role for determining the amount of product.

Q: An environmental engineer analyzes a sample of air contaminated with sulfur dioxide. To a 500.-mL sa...

A: Answer: By the use of stoichiometry, we will calculate the number of moles of SO2 and then by the us...

Q: What is the IUPAC name for the organic compound shown below?      a 1,6-dimethylcyclohexene   b ...

A: The naming of organic compounds is done by using rules given by international union of pure and appl...

Q: Enter your answer in the provided box. After 0.600 L of Ar at 1.06 atm and 203°C is mixed with 0.200...

A: Complete solution is given below in next step

Q: What is the mass of 2.2 x 10 ° CO 2 molecules? O a. 1.0 x 10-12 g O b.1.6 x 10-13 g O. 12x 106 g O d...

A:

Q: calculate M.V. (1atm, 30 degrees

A: Volume at one mole is called molar volume

Q: Why does the separation apparatus must be vented after several inversions?   a to make the stopcock...

A: Venting is an important step in an separation process Here We are required to state the purpose of v...

Q: What is normality of a solution that contains 1.5 g of Ca(OH)2 dissolved in 850 mL? (Molar mass = 74...

A:

Q: Part D What is the value of the rate constant k for this reaction? When entering compound units, ind...

A:   P 

Q: A mole of a compound composed of nitrogen and oxygen (N xO y) has a molecular weight of 92.0 g/mol. ...

A: Given,  Empirical formula = NxOy  Molecular weight of NxOy = 92 g/mol   

Q: The purpose of adding sodium sulfate in the extraction is to decrease the solubility of caffeine in ...

A: Solvent extraction or liquid-liquid extraction: The separation of compounds which are miscible in re...

Q: Draw the major product of this reaction. Ignore inorganic byproducts. Br2 (1 equiv)

A: We have to find the major product.

Q: where did the 14 come from?

A:

Q: A spot of black ink was placed on a strip of filter paper. The chromatogram was developed using an a...

A:

Q: A в D Which part in the figure can be a grating or prism? O A ов

A: There are four parts in the given diagram.  Where A is photovoltaic cell which generates electricity...

Q: Calculate the activity of Lat3 and IO3-, in a saturated solution of La(IO3)3 in a) water, b)0.010 M ...

A: a) In water, La(IO3)3 dissociates as:   La(IO3)3→La3++3IO3-  

Q: a) PhMgBr b) CHgNa• BeCl, c) CH CH BCI,

A: organic reactions

Q: In thin layer chromatography, the stationary phase is made of and the mobile phase is made of solid,...

A: Thin layer chromatography: TLC is a chromatography technique used to seperate non-volatile mixture. ...

Q: What is the percentage yield of a reaction in which 200 g of phosphorus trichloride reacts with exce...

A:

Q: Aluminum reacts with excess hy drochloric acid to form aqueous aluminum chloride and 44.9 mL of hydr...

A: Given: Volume of hydrogen gas evolved = 44.9 mL = 0.0449 L                                          ...

Q: PART 1: Write the half - reaction of each redox reaction and determine the oxidizing and reducing ag...

A: Redox reaction is defined as the reaction in which oxidation reduction take place or which involves ...

Q: SU 4 can be prepared from the reaction of 15.0 g of KMNO 4 with 22.6 g of H 25O 3? 2KMNO 4 + 5H 2SO ...

A: Sulphurous acid react potassium permagnate produced MnSO4

Q: CH,CH3 CH3 CH;CH,CHCHCH,CHCH3 CH(CH3)2

A:

Q: The solubility of Co(OH), in water at 25 °C is measured to be 6.4x 10 10. Use this information to ca...

A: We have to predict the Ksp.      

Q: k (s-1) The rate of a certain reaction was studied at various T(K) temperatures. The table shows tem...

A: Given, A table of Temperature (K) and rate constant (s-1) values are provided     Required,         ...

Q: Which of the following is FALSE about the wavelengths of electromagnetic radiation? O A. Radiation w...

A: We have to predict the false statement.  

Q: What is the linearity (r2) value of the following concentration and absorbance values: SAMPLE |CONCE...

A: given

Q: Let's say that we have 3.68 L of a gas was at an unknown pressure. However, at standard pressure, it...

A: Initial volume = 3.68 L  New pressure = standard pressure  New volume = 9.20 L  Initial or unknown p...

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 107. kl during a ce...

A:

Q: The standard addition method is used to analyze a sample of a river water for mercury. Solution A is...

A: Given, Percent transmittance of solution A = 56 % Percent transmittance of solution B = 33 % Percent...

Q: estion 6 he equilibrium constant for a particular reaction is 3.9 x 10-10 at 25°C. What is ne standa...

A: Standard Gibbs free energy is related to equilibrium constant

Q: Use this information to write a rate law for this reaction, and calculate the value of the rate cons...

A: Rate of reaction = k * [H2]^a * [I2]^b k = Rate constant a,b: Order of reaction

Q: How many significant figures of 350.670

A: In counting significant figures following rules are followed  1. All non zero numbers are significan...

Q: How much free lead (II) ion is present in a 95.4 mL of a solution that contains 136.8 microgram of P...

A: Answer: Higher the formation constant, more stable will be the compound. The value of high stability...

Q: 5- The internal energy of an ideal gas depends only on its temperature. Do the first-law analysis ot...

A: For the system, When the gas expands, its volume increases. The change in volume will be positive. S...

Q: Question 17 II в D Which part in the figure disperses light into its component wavelengths and selec...

A: The given figure is of monochromatic spectrophotometer. Its components are A -  Light source B -  Mo...

Q: Some measurements of the initial rate of a certain reaction are given in the table below. N2| |H2 in...

A:

Q: Which of the following statements are true for chemical interference? I. Releasing agents are added ...

A: Chemical Interference : It is occurs when the analyte is not totally decomposed in a flame. These ar...

Q: What reagents are used to make the following molecule? O HCI, H2O, ethanol (excess) O HCI, ethanol (...

A: Organic reactions are those in which organic reactant react to form organic products.

Q: 2. List 4 (FOUR) polymers that you encounter every day. 3. Describe the physical properties of the p...

A:

Q: Structure A: Complete the resonance structure. Select Draw Rings More Erase // C H H.

A: Resonance structure :- is delocalization of  charge on atom.  

Q: Which property of laser light is NOT correctly defined/described? extremely bright: high power at on...

A: Laser light have the following properties Extremely bright.  Monochromatic.  Collimated.  But not a...

Q: A solid sticky substance which strongly repels water is made of the following molecules: If it is tr...

A: The ester given is,    

Q: The reaction of sucrose with water in an acidic solution is C12H22011 + H2O C6H1206 + + C6H1206 sucr...

A: Given, rate constant (k) - 6.17 × 10-4 s-1. Initial reactant concentration([Ao]) - 0.40 M. time take...

Q: Name the given compounds. For uniformity's sake, name all the branched substituent as if naming an a...

A: Alkanes are compounds having single bonds between all carbon atoms present in them. The given compou...

Q: View Policies Current Attempt in Progress Consider the reaction, CH3CI(g) + 3Cl2lg) →CCI4(3) + 3HCI(...

A:

Q: A spot of black ink was placed on a strip of filter paper. The chromatogram was developed using an a...

A: The fastest moving spot has the highest Rf value. here we see C covered a long distance so it has h...

Q: Some chemicals, like hydrogen peroxide, are prone to decomposition by photocatalysis. How can you pr...

A:

Q: A certain liquid X has a normal freezing point of –3.20 °C and a freezing point depression constant ...

A:

Q: Question 6 A five-fold dilution was performed on a standard solution. The diluted solution will have...

A:                                   Answer  A five fold was performed on a standard solution.  The dil...

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.