Find the velocity of an electron ejected by a metal whose threshold frequency is 2.25 x 1014 s-1 when it is exposed to visible light of wavelength 515.5 nm.

Q: Use thermodynamic table below to find out if the solubility product of fluorite is lårger 100°C than...

A: The value of solubility product of CaF2 is needed to be determined at 100°C and at 25°C.  Given:  ...

Q: The cell notation for the Galvanic cell is A(s)/A²*/B2(s)/B¯ The Standard Reduction Potential are as...

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Q: Use the equation of sodium chloride dissolving in water to complete the activity. NaCl(s) ⇄ Na+(aq)...

A: The answer is given below

Q: A nitrogen laser generates a pulse containing 10.1 mJ of energy at a wavelength of 339.6 nm. How man...

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Q: What is the pH of a 0.069 M weak acid solution. K, for the weak acid is 5.4x10-6.

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Q: 1mol Na 36.5 g Na |= 1.59 mol Na +0.79 mol →2 Na 23 g Na 1molS 25.4 g S |= 0.79 mol S +0.79 mol → 1S...

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Q: A sample of helium gas at a pressure of 1.12 atm and a temperature of 21.6 °C, occupies a volume of ...

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Q: Predict the 'H NMR spectrum for the following compound, giving multiplicities and estimates of the c...

A: Here we have to find out the multiplicity ,chemical shift and coupling constants of the respective h...

Q: Mercury and bromine will react with each other to produce mercury (II) bromide: a. What mass of HgBr...

A: The mass of a compound can be calculated by the number of moles of the respective compound from a ba...

Q: What is the pressure in atmospheres of a soccer ball. The ball is 3.2 Liters and takes 15.50 Liters ...

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Q: 3. Fill in the boxes for the 2 products below AI H

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Q: For each of the following reactions, indicate whether you would expect the entropy of the system to ...

A: Given :-  CH3OH(l) → CH3OH(g)  N2O4(l)→ 2NO2(g)  CO(g) + H2O(s) → CO2(g) + H2(g)  2KClO3(s) →2KCl(s)...

Q: Aspirin (C9H8O4) is synthesized by reacting salicyclic acid (C7H6O3) with acetic anhydride (C4H6O3)....

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Q: What is the cell potential for the following reaction at 298.15 K? Y(s) + z2*(0.010 M) – y2*(0.0010 ...

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Q: The value of Ka for hypochlorous acid is 3.50x10-8. What is the value of Kb, for its conjugate base,...

A: The dissociation of the hypochlorous acid takes place as follows: HClO + H2O  → H3O+ +  ClO-

Q: 1-Butene and benzene as the only organic materials propose the synthesis of Ph CH2 CO CH2CH3.

A: We have to synthesize PhCH2COCH2CH3 from 1-butene and benzene.  

Q: CH3 A) addition B) substitution C) elimination Он D) rearrangement CH3

A: Addition reaction is a type of reaction in which there is addition of a molecule . Like when alkene ...

Q: What is the pH of solution prepared by mixing 30.0 mL of a 0.40 M HCl(aq) with  20.0 mL of a 0.60 M ...

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Q: The acid ionization constant for Cu(H20)6²+(aq) is 1.0×10-7. Calculate the pH of a 0.0410 M solution...

A: The acid dissociation constant for the given weak acid is = 1.0×10-7 The concentration of the weak a...

Q: 2. Predict the major product from the following reaction sequence: (Write out complete equations sho...

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Q: 5.27 A newly discovered gas has a density of 2.39 g/L at 23.0°C and 715 mm Hg. What is the molar mas...

A: Given, Density of a gas (d) = 2.39 g/L Temperature (T) = 23.0°C = (273.15 +23) K = 296.15 K Note: 76...

Q: Draw the products of the reaction shown. Electron flow is indicated with curved arrows. H3C-C=C-CH3 ...

A:   Click reaction:  It is an example for cyclo addition reaction  Alkyne and Azide  are reacted in t...

Q: Describe all of the intermolecular forces Carbon dioxide would experience. Justify your answer using...

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Q: Predict whether an aqueous solution of the following salts will be acidic, basic or neutral. Justify...

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Q: 5.41 A sample of a smokestack emission was collected into a 1.25-L tank at 752 mm Hg and analyzed. T...

A: For 100 g sample, Mass of CO2 = 92 g Mass of NO = 3.6 g Mass of SO2 = 1.2 g Mass of water = 4.1 g

Q: [COC14]¯ (alc) + 6H,O(alc) [Co(H,O),J?+ (alc) + 4C1¯(alc) deep blue rose pink

A: Exothermic: Heat is evolved. This is when product is more stable than the reactant   Endothermic: He...

Q: How many moles of thiocyanate ion are there in 2.0 ml of 0.00400 M KSCN

A: Volume of solution = 2 ml = 0.002 l Molarity of solution =0.00400 M

Q: The least reactive carboxylic acid derivative is carboxylate itself. In biological systems, the carb...

A: The acyl phosphate ester acts as a highly reactive acyl derivative like acyl chloride and its reacti...

Q: 5g of sugar at 10g of water. What is the volume?

A: Given :-  mass of sugar = 5 g  mass of water = 10 g  To calculate :-  total volume of solution 

Q: Question 9 . Which of the following statement/s islare TRUE? I. Electrochemistry deals with the phys...

A: There are several terms, we have to check which are true.

Q: The acid ionization constant for Fe(H20)6²+(aq) is 3.0×10-6. Calculate the pH of a 0.0254 M solution...

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Q: A solid substance A is soluble in water to the extent of 10 mg/mL of water at 25 °C and 100 mg/mL of...

A: A solid substance A is soluble in water to the extent of 10 mg/mL of water at 25 °C and 100 mg/mL of...

Q: One of the major commercial uses of sulfuric acid is the production of phosphoric acid and calcium s...

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Q: 50 mL of a 0.500M solution of ammonia (Kb=1.8x10^-5) was added to 200 mL ultra pure water. What is t...

A: The initial concentration of the ammonia solution is = 0.500 M The base dissociation constant for th...

Q: Liquid octane (CH;(CH,) CH;) reacts with gaseous oxygen gas (02) to produce gaseous carbon dioxide (...

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Q: Which of the following reactions result in a positive ∆ Ssys? a. H2O(g) = H2O(l) b. H2(g) + I2(g) = ...

A: The correct answer of the question is given below 

Q: Artificial Food Coloring are made up of? What are the important things to know in the artificial foo...

A: A artificial color additive is any substance that imparts color to a food, drug, cosmetic or the hum...

Q: Question 6 Compound A has a pka of 4.4 and compound B has a pka of 4.6. Which of the following state...

A: 6. The more stable the conjugate base the more stronger the acid  The smaller the pka value stronger...

Q: Which of the following islare TRUE about molar conductivity? I. The molar conductivity provides info...

A: 4th option is correct that is I, II ,III                              Or I.The molar conductivity pr...

Q: What is the a) vapor pressure (Psoln), and b) osmotic pressure (π) of a 26.0% (w/w) aqueous glucose ...

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Q: If a system has 5.00 x 102 kcal of work done to it, and releases 5.00 x 102 kJ of heat into its surr...

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Q: Calculate each of the following quantities: Mass in kg of 4.6 x 10 21 molecules of NO2 b. Amount in ...

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Q: Compare the following: Acid 1: hypochlorous acid, HCIO Acid 2: hydrogen sulfide ion , HS Acid 3: sul...

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Q: Write the net ionic equation for the acid-base reaction. Include physical states. HCIO,(aq)+NaOH(aq)...

A: We have to predict the net ionic equation .  

Q: What is the equivalent weight of CdI2 used to precipitate out CdS? CdI2 has a formula weight of 366....

A: Equivalent weight of a substance can be defined as the mass of one equivalent of that substance in g...

Q: 1. IOn selective electrode utilizing pCO2 is used fro the measurement of the electrolyte a....

A:  1) IOn selective electrode utilizing pCO2 is used fro the measurement of the electrolyte   answer: ...

Q: Direction: Draw the dipole moment vector for each molecules and identify whether the molecules are p...

A: Polar molecules are the molecules having non zero dipole moment and non polar molecules have zero di...

Q: Drew the structure of the first non-peptide product released upon trifuoroscetic acid treatment in t...

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Q: Draw the products of the reaction shown. Electron flow is indicated with curved arrows.

A: The chemical reaction given is 

Q: he molar mass of nicotine is 162.1 g/mol. It contains 74.0 % carbon, 8.7 % ydrogen, and 17.3 % nitro...

A: Given that compound contains 74% Carbon 8.7% Hydrogen and 17.3% Nitrogen.

Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.