A radioactive isotope has a half life of 17.1 minutes. How long will it take for the radiation from a 325 pCi sample to decrease to 162 pCi?

Q: Ammonia, NH3, is prepared for use as a fertilizer by reacting N₂ with H₂ Type here to search O II…

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Q: 26. A reaction vessel for synthesizing ammonia by reacting nitrogen and hydrogen is charged with…

A: 26. 28.0 Kg of ammonia, NH3 is synthesized by the reaction of 6.04 Kg of H2 and excess N2 .We have…

Q: [Review Topics] [References] Use the References to access important values if needed for this…

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Q: Calculate the molar solubility of AgCl

A: When an ion is added to a solution having the same ion the equilibrium shifts towards the backward…

Q: 8. Draw the expanded structure of pentyl mesylate; pentyl tosylate; and pentyl triflate below. Label…

A: we have to draw the expanded structure of the given compounds. It means that we have to show all the…

Q: The equilibrium constant, Kp, for the following reaction is 55.6at 698 K: H2(g) + I2(g) 2HI(g)…

A: Given is, Kp= 55.6  Initial pressure= 1.33 atm  H2 + I2 -----> 2HI  Calculate pH2 =?…

Q: CHS +37 CH3 C413 CHS

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Q: A photon of blue light has a frequency of 6.20 x 10¹4 Hz. Calculate the wavelength of this photon (c…

A: Frequency is inversely proportional to wavelength

Q: 2. Lead (II) sulfide is the principle source of lead metal. To obtain the metal, the sulfide is…

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Q: The dissociation of lactic acid to lactate is shown in the reaction. Lactic acid has a pKa of 3.86.…

A: We would use Henderson Hasselbalch equation to calculate the ratio.

Q: H3C сь AICĮ OCH3 G CI

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Q: How many atoms of carbon and how many grams of carbon are there in 5 mol of each of the following…

A: Here, we have to find the number of atoms of carbons and the mass of carbon in 5 mol of CaCO3 and 5…

Q: Calculate the pH when 45.0 mL of 0.200 M HBr is mixed with 28.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 ×…

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Q: The equilibrium constant, Kc , for the following reaction is at 7.00 x 10^-5 at 673 K. NH4I (g)…

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Q: Calculate the wavelength (in nanometers) of light with energy 1.32 x 10^-26 kJ per photon

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Q: Solve the following multiple-choice questions: Use the relative size of the 3s orbital represented…

A: Here  we have to solve the following given questions for the given  orbitals with respect 3S…

Q: Is it possible to use mesoporous silica nanoparticles (nano carriers)as support of catalysts or bio…

A: Silica (SiO2) is one of the most widely available natural minerals on earth. Since the discovery of…

Q: Draw the major product from this reaction. Use wedge and dash bonds to indicate relative…

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Q: The equilibrium constant, Ke, for the following reaction is 5.10 x 10-6 at 548 K. NH4Cl(g) NH3(g) +…

A: Kc is the ratio of  product of concentration of products raised to their stoichiometric coefficient…

Q: Draw the different stereoisomers that CH3CHClCH2CHOHCH3 presents, and indicate the isomeric…

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Q: The concentration of Fe2+ in a sample is determined by measuring the absorbance of its complex with…

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Q: Y Y Part A Given the concentrations, calculate the equilibrium constant for this reaction: 2SO₂(g) +…

A: A.) To calculate the Kc, first we have to write an expression for Kc for given equilibrium reaction.…

Q: A chemist prepares a solution of sodium bromide   NaBr    by measuring out  0.25g  of  NaBr  into…

A: Given :-  Mass of NaBr = 0.25 g  Volume of solution = 50. mL  To calculate :-  Molarity of Br- ions

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

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Q: For each of the molecules below, determine the oxidation state for every atom in the compound. Note…

A: A question based on compounds. 4 compounds are prescribed. Oxidation state of each element in the…

Q: For each compound in the table below, decide whether there would be any hydrogen-bonding force…

A: we have to determine if the given molecules can form H-bonds with molecules of same compound and…

Q: Which of the following nuclides would you expect to be radioactive: 5826Fe2658Fe, 5827Co2758Co,…

A: Radioactivity: Radioactivity is the phenomenon of the spontaneous disintegration of unstable atomic…

Q: Which of the reactions are exothermic? 2 Mg(s) + O₂(g) → 2 MgO(s) + heat NH, (g) + HCl(g)NH₂Cl(s) +…

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Q: Choose the BEST reagent for carrying out the following conversion. A NaOH, H₂O (B) NaBH4 CH₂PPh3 All…

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Q: Write the complete ground-state electron configuration of B³+.

A: Electrons are filled in the orbitals of subshells in their increasing energy order.

Q: 2. Calculate the mass of NaBr (sodium bromide) required to prepare 1.5 L of 0.60 M KCI solution.…

A: #2: 1.5 L of 0.60 M KCl solution is made from KCl (potassium chloride), not from NaBr (Sodium…

Q: For each solute, click the button under the better solvent. solute KC1 1₂ NaCl Which is the better…

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Q: Calculate the percent yield if 48.6 gg of nitrobenzene is obtained from 27.7 gg of nitric acid with…

A: Given, C6H6(l) + HNO3(aq)→ C6H5NO2(l) + H2O(l) Observed yield of nitrobenzene (C6H5NO2) = 48.6 g…

Q: Suppose the fluid in the stomach of a man suffering from indigestion can be considered to be 150.mL…

A: Given :-  NaHCO3 + HCl → NaCl + H2O + CO2  Volume of 0.045 M HCl solution used by = 150 mL  To…

Q: a particular temperature,  kp= 3.40 * 10^2 for the reaction H2 (g) +I2 (g) 2HI(g)  If 1.73 atm of…

A: Kp is equilibrium constant

Q: Solid-state electrodes that respond to anions create potential difference across the solid-state…

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Q: The following initial rate data are for the gas phase reaction of hydrogen with iodine: H₂+1₂ → 2 HI…

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Q: 2) A) HClO4 B) HI C) HCl D) HF E) HNO3 Which one of the following is a weak acid?

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Q: calculate what amount of  substrates choline chloride and malic acid is required to obtain 20 g…

A: Here we have to determine the mass of choline chloride and malic acid present in a 20 g mixture if…

Q: A 0.19 g sample of sodium carbonate (Na2CO3) and sodium bicarbonate (Na4CO3) mixture was dissolved…

A: Here 0.19 gram of sodium carbonate  and sodium bicarbonate mixture was dissolved in 25 ml of water.…

Q: What absorbance value corresponds to 40.2% T? A = A 0.0130 M solution of a certain analyte exhibits…

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Q: Self Assessment Exercise 9.16 1 try left We looked at the acrylonitrile molecule, C3H3N, in the…

A: Sp3 hybridisation - Tetrahedral structure  Sp2 hybridization - Trigonal planar  Sp hybridization -…

Q: Use the following information to answer the next question Factors that can affect equilibrium I. I…

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Q: HO ОН I ОН I HỌ— CH,—CH–CH–CH–CH=C-H :0: || C - solute - I ОН :0: || NH2 — C — NH2 :0: || I ОН :0:…

A: Like dissolves like. Polar compounds are soluble in polar solvents and non-polar compounds are…

Q: A 0.1200 g sample of pure iron wire was dissolved in acid, reduced to +2 state and titrated with…

A: Given, Ce4+ + Fe2+ ---> Ce3+ + Fe3+ mass of pure iron (Fe) = 0.1200 g Volume of Ce4+ solution =…

Q: The standard heat of formation for Ag2CrO4(s) is -712 kJ/mol at 298 K. Write the formation equation…

A: The equation for the heat of formation reaction can be written as, 2Ag++CrO4-2→ Ag2CrO4 ∆H=-712…

Q: The preparations of two aqueous solutions are described in the table below. For each solution, write…

A: #Part-1: HCH3CO2 is a weak acid with conjugate base CH3CO2-.  moles of NaOH taken = 0.7 mol  Moles…

Q: . If I only have 450 g of blue copper sulfate, how many Liters of a solution can I make if I want to…

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Q: 13 of 36 > Consider the pair of reactions. Draw the organic products, then predict the type of…

A: We know in presence of strong nucleophile secondary halide can undergo SN2 reaction in which rate…

Q: A ОН Н OH H₂CrO 4 в ОН ОН C H ОН D ОН

A: Chromic acid, H2CrO4 is a strong oxidizing agent that oxidizes primary alcohol to carbocyclic acid,…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.