Cobalt-60 is radioactive and has a half life of 5.26 years. What percentage of a sample would be left after 11.3 years? Round your answer to 2 significant digits. X 5

Q: Salicylic acid (H2C8H4O2) is a diprotic acid (Ka1 = 1.12 x 10-3 ; Ka2 = 3.91 x 10-6). Provide the…

A: A diprotic acid

Q: [Review Topics] A Fischer projection of a monosaccharide is shown below: H- HO- CH₂OH -OH C=0

A: Any carbohydrate with the carbonyl group on the second carbon is an ketose whereas Any carbohydrate…

Q: How many moles of N₂ are present in a sample that is at 29.9 °C, 24.5 psi, and has a volume of 903.8…

A: Temperature ( T ) = 29.9 ℃ = 302.9 K Volume ( V )      =  903.8 mL  = 0.9038 L Pressure ( P )   =…

Q: In a photochemical reaction, two molecules A and B interact with a photon to produce two different…

A: The Jablonski diagram is a useful tool for understanding the electronic states of a molecule and its…

Q: The equilibrium constant, K, for the following reaction is 1.83x10-² at 705 K. 2HI(g) H₂(g) + 1₂(g)…

A:

Q: 1 attempts left Be sure to answer all parts. Name the unidentified species and write the…

A: Transmutation is a process in which the nucleus changes the number of protons to produce an atom…

Q: Choose the best Lewis structure for CH₂Cl₂. H----H H :a-c-c: H H-H---: H ta H Cl- H CI=C=C1: H

A:

Q: In a complex transition metal catalyst, how can the steric and electronic properties of ligands be…

A: The reactivity, selectivity, and stability of a transition metal catalyst can be controlled by…

Q: The maximum amount of silver iodide that will dissolve in a 0.178 M potassium iodide solution is M.

A: Given

Q: 13. Starting with benzene provide a multi-step synthesis of the molecules shown below. You may use…

A: We know the benzene ring due to pi electron cloud supposed to be less undergo in Nucleophilic…

Q: How many minutes does 5.857 A of current need to be applied to plate 3.870 g of aluminum onto a…

A: Given, the half-reaction: Al3+(aq) + 3e- → Al(s) We have to find the time required that a current of…

Q: A unknown nonmetal (X) with five valence electrons reacts with hydrogen producing a stable molecule…

A: There are two types of geometry-  1- molecular geometry - lone pairs are not included for…

Q: A 1.00 liter solution contains 0.32 M ammonia and 0.25 M ammonium chloride. If 0.12 moles of…

A: Answer: Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: the decomposition of ammonia gas is 2NH3 = N2 + 3H2  If a balloon was filled with 3.5 L of ammonia…

A:

Q: How many valence electrons are in a neutral atom of chlorine?

A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the…

Q: A unknown nonmetal (X) with five valence electrons reacts with hydrogen producing a stable molecule…

A: There are two types of geometry-  1- molecular geometry - lone pairs are not included for…

Q: } ō 1 OH (3R 4R)-3-brom-4-phenylhexan CHO H₂CH₂C NH₂ CH₂CH3 H

A: As per rule we will solve first three sub-parts only. Kindly repost other part as a separate…

Q: Explain the reason that increasing and decreasing the volume of a gas will affect the reaction rate.

A: The rate of reaction directs to the speed or rate at which the products are developed from the…

Q: Consider the apparatus shown in the drawing. N₂ 2.0 L 1.0 atm 25 °C 02 3.0 L 2.0 atm 25 °C

A: Given,  Bulb 1: Volume of N2 = 2.0 L Pressure of N2 = 1.0 atm Temperature = 25 °C Bulb 2: Volume of…

Q: An equilibrium is established for the endothermic reaction 2 CO(g) + MoO₂ (s) 2 CO₂(g) + Mo(s). How…

A: Given reaction is,  2 CO(g) + MoO2 (s) ⇌ 2 CO2 (g) + Mo(s) We need to tell how the partial pressure…

Q: 11) What are the major products of the following reaction? 아 1 eq H₂SO4 H₂O HO b) OH a HO но. OH

A: The given reaction explains the acid catalysed cleavage of ether to form corresponding alcohols.

Q: A compound forms from a hypothetical nonmetal, "narbon", from group 15 (V), and three of the same…

A:

Q: (Q-1) Calculate the work done when 1 mol of an ideal gas at 2 bar pressure and 300 K is expanded…

A: Following are given for an ideal gas -  Number of moles of the gas n = 1 mol  Initial pressure of…

Q: 10) What is the major product of the following reaction? a) + A NO₂ NO₂ b) NO₂ NO₂ d) NO2

A: This is an example of Diels-Alder reaction. During this reaction: 1. Stereochemistry of dienophile…

Q: Assume that the reaction: 2A + 3B --> 2C is first order in both reactants A and B.  Calculate the…

A:

Q: 3. Provide the missing product in the following reactions and show the complete mechanism. شر CH₂N₂…

A: Diazmethane in the presence of acid gets protonated to produce methanediazonium which alkylates…

Q: NH₂ primary amine secondary amine tertiary amine most basic? most nucleophilic?

A: Here we have to identify which one is most nucleophilic and which one is most basic amongst given…

Q: Consider a galvanic cell with the following components: A platinum electrode in 0.20 M Fe2+ (aq) and…

A:

Q: 6. Which change would increase the concentration of Pb²+ in the following equilibrium? PbCrO4(s) +…

A: The given equilibrium reaction is PbCrO4(s) + heat →Pb2+(aq) + CrO42-(aq) The change that will shift…

Q: The pKa of formic acid is 3.75. What is the Ka of formic acid? Ka = 10-pka

A:

Q: Naphthalene, C₁0H8 (shown at right) can be simplified by constructing SALC-AOs to serve as a basis.…

A: The naphthalene molecule is given to have D2h point group. Considering that the naphthalene molecule…

Q: When a 20.4 mL sample of a 0.472 M aqueous acetic acid solution is titrated with a 0.493 M aqueous…

A: •Here acetic acid (weak acid) and potassium hydroxide (strong base) is titrated. •During titration…

Q: The reaction rate constant for a particular first order reaction is .820 M/s. How many seconds will…

A:

Q: A botanist measures the thickness of a leaf. The thickness is 2.9 mm. What is the thickness in…

A:

Q: A 1.00-L solution contains 3.50x 10 M Cu(NO3)2 and 1.60x10³ M ethylenediamine (en). The K, for…

A: Given data: The volume of solution = 1 LitreMolarity of Cu(NO3)2  =  3.50×10-4MMolarity of…

Q: Draw the major product of this reaction. Ignore inorganic byproducts. 1. Hg(O2CCF3)2, CH3OH 2.…

A: The question is based on organic reactions.     we need to identify the product formed and explain…

Q: In the context of quantum mechanics and molecular orbital theory, how do non-bonding orbitals…

A: Non-bonding orbitals are molecular orbitals that neither contribute to bonding nor antibonding…

Q: (a) Calculate the standard enthalpy of formation of liquid toluene, C7H8 (1), from the elements…

A: 1) Cgraphite(s)+O2(g) →CO2(g)              ∆rH°=-393.5 KJ/mol2) C7H8(l) +9O2(g) →7CO2(g) +4H2O(l)…

Q: Monosaccharides are in dynamic equilibrium between the closed, cyclic form and the open, linear…

A: Monosaccharides are the simplest form of complex carbohydrates. We can also say that it is tge…

Q: Draw the mechanism for the living anionic chain growth reaction shown below. •$= toluene -BuLi

A: Anionic chain growth polymerization is a chain growth polymerization in which monomers are added on…

Q: How much heat was absorbed (in J) if a 34.8 g sample of an alloy with a specific heat of 0.868 J/g…

A: Heat absorbed by the alloy is given by: q = m C ∆T Where, q = heat absorbed m = mass of the alloy Cv…

Q: Consider the following data on some weak acids and weak bases: name hypochlorous acid acetic acid…

A: The question is based on the concept of salt hydrolysis. we need to arrange the given salts in…

Q: Given the reaction Sn(s) + 4OH-(aq) + 2Pt2+(aq) ⇌ SnO2(s) + 2H2O(l) + 2Pt(s) for which E°cell = 2.13…

A:

Q: The vapor pressure of pure water at 25oC is 23.8 mmHg. What is the vapor pressure of water above a…

A:

Q: Calculate the pressure, in atmospheres, if 2.45x10-³ mol occupies 414 mL at 137 °C. Express the…

A:

Q: the atomic weight of an atom containg 9 protons 9 electrons and 10 neutrons?

A: Answer:- This question is answered by using the simple concept of atomic weight using the given…

Q: The explosion of nitroglycerin is shown in the following reaction: 4 C3H5N309(1) N₂(g) + 12 CO₂(g) +…

A: Answer: Entropy is a measure of system's disorderliness or randomness. More disordered the system…

Q: Use the References to access important values if needed for this question. A sample of methane gas…

A:

Q: اما 1) Mg 2) CH₂OH 3) H H 4) H₂O

A: Given compound is 1 chloro-2-methyl propane.  First reaction is formation of Grignard reagent.…

Q: Calculate the concentration of an HCl solution if 100.0 mL of the HCl required 33.00 mL of 0.2000 M…

A: