2) 3) 4)

Q: Polonium crystallizes with a simple cubic structure. It has a densityof 9.3 g>cm3, a radius of 16...

A: Given data contains, Density is 9.3 g/cm3. Radius is 167 pm. Molar mass is 209 g/mol.

Q: When the following equation is balanced properly under acidic conditions, what are the coefficients ...

A:

Q: Which of the following gases will move the fastest at 298K? Select one: a. He b. O2 c. H2O d. none o...

A: The root mean square velocity (vrms) is the measure of the speed of gaseous particles. It is given b...

Q: When 25.0 grams iron react with excess hydrochloric acid how many liters of hydrogen gas form at 25....

A:

Q: Consider the reactions: Fe(s) + 2HCI(aq)FEC12(s) + H2(g) Using standard absolute entropies at 298K, ...

A: (1) Balanced Chemical equation is - Fe(s) + 2HCl(aq) ---> FeCl2(s) + H2(g) Then, entropy change o...

Q: When 20.00 g of copper at 450.0 degrees C has 300.0 J of heat removed from it, what is the final tem...

A: Due to the liberation of heat temperature of copper decreases . As the heat is liberated we represen...

Q: Explain transmutation and provide one or two examples

A: Formations of nuclei using radioactive materials are referred as nuclear reactions. Transmutation is...

Q: Carry out the following conversions. (a) 5 pm =_________________cm=_______________nm(b) 8.5 cm3 =___...

A: This question is based and  unit and measurement  some  standard conversion are     [length units] 1...

Q: Provide the formula for each of the following binary ionic compounds. (a) copper(II) sulfide (b) iro...

A: Provide the formula for each of the following binary ionic compounds. (a) copper(II) sulfide(b) iron...

Q: The solubility of copper(I) chloride is 3.91 mg per 100.0 mL of solution. Calculate Ksp for CuCl.

A: The solubility of copper (I) chloride is 3.91 mg per 100.0 mL of solution. Ksp  for CuCl is to be de...

Q: State the number of atoms for each of the following metals. (a) 63.55 g Cu (b) 40.08 g Ca

A: Number of moles of a substance is equal to the mass of substance divided by its molar mass. In one m...

Q: Propose a balanced chemical equation for the reaction of an acid and a base.

A: The hydrobromic acid (HBr) and sodium hydroxide (NaOH) is strong acid and strong base respectively. ...

Q: The pH of an aqueous solution of 0.413 M triethylamine (a weak base with the formula (C2H3)N) is

A: The value of base dissociation constant ,Kb, of ethylamine is 5.6 . 10-4  ethylamine is a weak base ...

Q: Define the term triple bond?

A: Solution- chemical between two atoms when that two atoms bonding with the six bonding electrons in n...

Q: Which nuclide is most likely to undergo beta decay? a) Si-22 b) Rb-91 c) Ar-35 d) Co-52

A: Elements having neutron to proton ratio (N/Z) more are unstable as they contain more number of neutr...

Q: Show, with calculations, how the following data illustrate the law of multiple proportions:Compound ...

A: The given data contains, mass % of sulfur in compound 1 = 47.5 mass % of chlorine in compound 1 = 52...

Q: Can someone pls help idk why it's wrong

A: The ionization energy (IE1) is defined as the quantity of energy needed to eliminate the loosely bou...

Q: Third Page: Choose between nitric acid, phosphoric acid or acetic acid. Include the formula, list 5 ...

A: Nitric acid is a colorless mineral acid. It is also known as Aqua fortis. It is highly corrosive and...

Q: Barium has a density of 3.59 g>cm3and crystallizes with thebody-centered cubic unit cell. Calcula...

A: Barium crystallizes with body centered cubic unit cell which means atoms are present at all 8 corner...

Q: When the following equation is balanced properly under basic conditions, what are the coefficients o...

A:

Q: Horizontal rows in the periodic table are referred to by what two terms?

A: Periodic table is a systematic arrangement of chemical elements on the basis of their electronic con...

Q: Do you change a subscript in a chemical formula to balance an equation?

A:

Q: Indicate the region of the spectrum for each of the following wavelengths of light. (a) 280 nm.     ...

A: a.

Q: Draw three resonance forms for the cyclohexadienyl radical

A:

Q: Predict the major produc 1) H2, Lindlar's catalyst 2) HBr Br Br Br Br Br В E D C A

A: Lindlar catalyst: Alkynes can be selectively reduced to an alkene by a Lindlar catalyst. The Lindlar...

Q: Calculate the concentration of hydrochloric acid if 50.0 mL of hydrochloric acid is neutralized by 2...

A:

Q: What is the pH of a buffer that is 0.140 M in formic acid (HCHO2) and 0.010 M in potassium formate (...

A: Given: [Acid] = 0.140 M [Salt] = 0.010 M Ka = 1.8 * 10-4   We have to calculate pH of buffer solutio...

Q: Describe the chemistry of carbon and the diff erence between inorganic and organic compounds.

A: The atomic number of carbon is 6. Its electronic configuration if 2,4. Its valency is + 4.

Q: Can you prove this question from the

A:

Q: Both 1,2-dihydronaphthalene and 1,4-dihydronaphthalene may be selectively hydrogenated to 1,2,3,4-te...

A: Consider the following reaction diagram, which illustrates that both 1,2-dihydronaphthalene and 1,4-...

Q: Indicate the physical state for each of the following elements at 25 °C and normal pressure. Classif...

A: (a) barium (Ba) : Physical state = Solid  Metal element.  (b) boron (B)  Physical state = Solid  Sem...

Q: The molar conductivity at infinite dilution in case of NaBr, HBr and NaAc are 116.4, 415.9 and 81.0,...

A: Given data is as follows: The molar conductivity at infinite dilution of NaBr = 116.4 Scm2mol-1 The ...

Q: Define the term Hypervalent Molecules?

A: ANSWERE IS DISCUSSED BELOW :

Q: 27) Which region of the following phase diagram represents solid? Which curve represents the vaporiz...

A: Phase diagrams: These are the graphical representation of states of matter of compounds with variabl...

Q: 4. Write the orbital notation, complete electron configuration, and electron dot symbol for the foll...

A:

Q: what are they products of the reactions?

A:

Q: P4 (s) + 5 O2 (g) = 2 P2O5 (g) If 5.31 moles of phosphorous react how many liters of diphosphorous p...

A: Given: For the reaction: P4 (s) + 5 O2 (g) --> 2 P2O5 (g) 1 mol  5 mol           2 mol Moles of p...

Q: 3. The kinetics of the following overall reaction was studied: A+B→F +G The following mechanism was ...

A:

Q: Rp. 4 Voina method n experiment of determination of KBr (g%) by volhard met flask; - 15ml KBr was ta...

A: The question is based on quantitative estimation of potassium bromide present in the given sample. W...

Q: What pH is needed to precipitate Ni(OH)2 so completely that Nicole concentration is less than 1.0x10...

A: As you have already worked out (correctly) the first part of the question , lets concentrate on the ...

Q: What is an electron shell?

A: An electron shell has to be defined.

Q: Question 5 In the majority of a-amino acids, the carboxyl group and the amino group have pKa's of ap...

A: This Question contains multiple Questions ( means multiple part ) and if Questions have multiple pro...

Q: Use the solubility generalizations on the information page to predict if one or more precipitates wi...

A: The product of the reaction of aqueous solutions of manganese sulphate and zinc nitrate has to be gi...

Q: Consider the reaction A B with AH° = -42.46 kJ/molxn- What should be the AH° in kJ/moln for the reac...

A: Consider the given target equation is as follows; 3 B → 3 A                                  ∆H°=? C...

Q: Determine the H30* concentration in the following solutions. Identify each solution as acidic, basic...

A: If the pH>7: Basic solution If pH < 7: Acidic solution If pH =7: Neutral solution (a) pH =11.0...

Q: Please answer Q1

A: Concentration of oxalic acid can be measured in terms of molarity. It is equal to the number of mole...

Q: Bronze is an alloy of copper. What is the alloying mettalic element?

A: Alloy: It is defined as a mixture of two or more elements with a certain fixed composition in which ...

Q: Answer Q20, 21, 22 and 23 explaining detailly your solution for each answer.

A:

Q: . An aqueous solution is saturated in both potassium chlorate andcarbon dioxide gas at room temperat...

A: What will happen if an aqueous solution is saturated in both potassium chlorate andcarbon dioxide ga...

Q: Identify the mechanism by which each of the reactions above proceeds from among the mechanism listed...

A: The first reaction is hydration of alkene in presence of acid catalyst.

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.