Define atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so?

Q: What mass of zinc (in grams) is deposited at the cathode when a current of 9.4 amperes passes…

A: According to the first law of Faraday, the mass of a metal deposited on the cathode during…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.14 kg sample…

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Q: 5.50 g of As₂O3 are titrated with 33.5 mL of KMnO4 to reach the end point. 5 As₂O3(s) + 4 MnO4 (aq)…

A: Given -> Weight of Ag2O3 = 5.50 gm  Volume of KMnO4 = 33.5 ml = 0.0335 L (1L = 1000ml)

Q: Calculate the energy required to heat 1.90 kg of water from 35.1 °C to 49.1 °C. Assume the specific…

A: Specific Heat capacity is amount of heat required to increase the temperatures of one gram of…

Q: 3. The osmotic pressure of an unknown polymer is measured at 298 K. Determine the molar mass of the…

A: Temperature = 298 K  Osmotic Pressure, π = 3.31 × 104 Pa

Q: Calculate the amount of heat needed to melt 22.2 g of solid octane (CgH₁g) and bring it to a…

A: Given: Mass of solid octane (m) = 22.2 g Final temperature = 69.4oC Known: Heat of fusion of octane…

Q: In crossed aldol condensation，in order to avoid unwanted product mixture，the compound without alpha…

A: The compound without alpha hydrogen like benzaldehyde can be a good choice for crossed aldol…

Q: How many grams of CaH2 are needed to generate 10.0 L of H2 gas if the pressure of H2 is 750. torr at…

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Q: Choose the correct structure of (2S,3R)-2-tert-butyl-3-isobutyloxirane 섹 •H 부 H 봣 제 니 H •H

A: Following all the IUPAC rules we are going to determine the structure of given compound.   Given…

Q: Ethylbutanoate undergoes hydrolysis with acid. What are two products? Ethanoic acid and butanol O…

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Q: SeCl3+ What is the geometry for electron and molecule?

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Q: Air 1.01 J/g degrees Celsius Copper 0.385 J/g degrees Celsius NaCl 0.864 J/g degrees Celsius After…

A: Specific Heat Capacity is the amount of heat required to raise the temperature of 1 gram of…

Q: Complete the balanced neutralization equation for the reaction below. Be sure to include the proper…

A: HCl is a strong  acid and NaOH is a strong base. When strong  acid and strong  base react each other…

Q: Which of the following is the structure 2,6-dimethyl-3-heptyne? OH3C-CEC-CH-CH₂-CH₂-Br HỌC-CH–CH3…

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Q: The element zirconium (Zr) crystallizes with a Simple Hexagonal unit cell. The density of a…

A: density (d)  =mass / volume  volume  = 3*sqrt(3)*a^2*C / 2      C = 1.633 a      a = 2r    C =…

Q: Starting with benzene and using any other necessary reagents of your choice, design a synthesis the…

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Q: Find the temperature at which K = 42.0 for the reaction H₂(g) + I2(g) 2HI(g). [Given: at 25°C, for…

A: We will first calculate ∆S° and ∆H° , then calculate temperature.

Q: A 50.0 mL solution of Ca(OH)₂ with an unknown concentration was titrated with 0.340 M HNO₃. To reach…

A: We have to write the balanced equation for the reaction and calculate :- moles of  HNO₃ moles of…

Q: 2. You dissolve 290 grams of K₂SO4 into 900 ml of water. Calculate the formula mass of K₂SO4…

A: Given that, 290 grand of K2SO4 dissolved in 900 mL of water. We have to answers the given questions.…

Q: Start with a 500 ml solution of 1.0 M Benzoic Acid with a pKa of 4.2. Now you add in enough grams of…

A: We need to use compare the pH and pKa value to determine the answer.  If  pH < pKa , then…

Q: g. h. i. H₂ Pd/C 1. BH3, thf 2. H₂O2, NaOH Br

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Q: The following is an elementary reaction: 2ND C1 (g) → ² NO (9) + Cl₂ (g) This reaction is performed…

A: The given elementary reaction is: 2NOClg→2NOg+Cl2g

Q: Volume of 2.00 M HC1 Volume of 2.00 M NaOH Volume of solution Tinitial T AT (T final final -…

A: Given that,  Molarity of HCl solution = molarity of NaOH solution = 2.0 M Average volume of HCl…

Q: A galvanic cell is powered by the following redox reaction: 2+ 2 MnO4(aq) + 16 H* (aq) + 5 Zn(s) - 2…

A: Given : reaction

Q: Solid Liquid Gas As the system changes from solid --> liquid --> gas, what is the sign of deltaH and…

A: The order of the strongly bonded particles -  Solid > Liquid > gas

Q: 6. Consider the reaction of solid PbO and gaseous NH₃ to form solid Pb, nitrogen gas, and water…

A: The reaction of solid PbO and gaseous NH₃ to form solid Pb, nitrogen gas, and water vapor.The…

Q: Calculate AHrxn for the reaction: CH₂(g) + 4 Cl(g) → CCl4 (g) + 4 HCl(g) Use the following reactions…

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Q: 8. Which of the following statements is the best explanation for the effect of increase in…

A: Chemical kinetics can be defined as the branch of chemistry that deals with rates of the chemical…

Q: Use the data below to determine the % by mass of Fe to TWO decimal places, if a 0.02 M KMnO4…

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Q: Write a balanced chemical equation based on the following description: propanol, C3H7OH(1) burns in…

A: In the balanced chemical reaction, the total number of each atom should be same in both the side of…

Q: 13. a. b. C. d. e. Which of the following salts is basic? NH4Cl NaCl KC104 CH3NH3C1 KNO₂

A: Salt is of three types :-  Acidic salt  Basic salt  Neutral salt

Q: Classify each chemical reaction: KBr(aq) + AgNO, (a) 1 2K (s) + Cl₂(g) → 2KC1(s) KOH(aq) + HBrO (aq)…

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Q: 26. a. b. C. d. e. Which of the following statements are true when temperature increases? I only II…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat evolved or absorbed by…

Q: What does the lattice energy tell us about in an ionic solid?

A: This question is based on Lattice energy

Q: Calculate the energy required to heat 256.0 g of iron from 2.2 °C to 18.7 °C. Assume the specific…

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Q: Calculate the binding energy (in Joules) of a nuclide 112X48 from the following information: mass…

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Q: predict the steric number and molecular geometry of SF4.

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Q: Choose the characteristic(s) that correspond to oils but not fats. Usually from plants and fish. O…

A: we have to select the correct statements with respect to oils

Q: 5) Given the electronegativities; which covalent single bond is the leaat pola Element P Se се C 2.1…

A: Electronegativity of an element is defined as the tendency of an element to withdraw the covalent…

Q: L-Pd-Ph: R...) HO-BY2 C OH R-BY2 OH L-Pd-Ph OH L L-Pd-Ph X... b t MOH MX

A: Organometallic is branch of chemistry in which we deal with metal carbon bond. In the given…

Q: Which of the following is(are) complex lipids? Lecithin ✔ Steroid

A: We have been given five lipids and we have been asked to choose lipids that are complex lipids.We…

Q: Which of the following ligands can never have the number of electrons it donates (when coordinating)…

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Q: Hydrogen peroxide decays into water and oxygen  H2O2(aq)  --->  H2O(l)  +  1/2 O2(g) If we begin…

A: The rate constant for the decomposition of hydrogen peroxide to hydrogen gas and oxygen gas is given…

Q: Classify each chemical reaction: 2CH₂CH₂(g) +70, (g) → 4CO₂(g) + 6H₂O(g) KOH(aq) + HBrO (aq)…

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Q: A certain metal M forms a soluble sulfate salt M₂(SO4)3 Suppose the left half cell of a galvanic…

A: To check the positive and negative electrode, we need to see on which side oxidation is occurred.…

Q: A tiny sample of an aqueous solution of two substances R and P is sketched below, as if it was under…

A: Given that, an equilibrium interconversion reaction is R ⇌ P. The value of the equilibrium constant…

Q: Consider the reaction 2HBr(g) H₂(g) + Br₂(1) Using the standard thermodynamic data in the tables…

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Q: Aqueous sulfuric acid H2SO4 will react with solid sodium hydroxide NaOH to produce aqueous sodium…

A: We are given a chemical reaction and asked to calculate the mass of product produced from the…

Q: 24. a. b. C. d. e. Consider the reaction A + B C + D. The reaction is second order in A and zero…

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Q: 5. Substitution and Elimination Reactions. (a) Draw the structure of all major organic product(s)…

A: Elimination reactions often compete with substitution reactions. In this reaction, a substrate…