The half life of iodine-125 is 60 days. What fraction of iodine-125 nuclides would be left after 360 days?

Q: Question 8 - a) When boiling a pot of water, some of the energy is used to increase the temperature…

A: Specific heat : It is the quantity of heat required to raise the temperature of one gram of a…

Q: 7. Limestone, CaCO3, when subjected to a temperature of 900°C in a kiln, decomposes to solid calcium…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 4. The specific heat Cp of a substance is given by Cp=a+BỊ where a = 20.35 J/K and b = 0.2 J K¹2…

A: Since you have posted multiple questions, we will provide the solution for only the first question…

Q: Q = mcAt water (c = 4.18 J/gC) A2B(s) has a molar mass of 37.5 g/mole A water based solution of 750…

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Q: How many grams of KCIO, are needed to form 23.1 g of O,? 2 KCIO, (s) → 2 KCI(s) + 30,(g)

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Q: Question 5 - Calculate the pH of a buffer produced by mixing 50 mL of a 0.1M solution of sodium…

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Q: 2. Esters can be made by a condensation reaction between what two kinds of molecules? 3. What…

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Q: What is the mass, in grams, of 22.6 milliliters of gasoline?

A: density = mass/volume  so, mass = density × volume

Q: 3) 120g of Chromium-48 decays. After 6 half-lives, how much of the original nuclei would remain?

A: Given,  Initial amount of Chromium - 48 is 120g. After 6 half lives the original nuclei would remain…

Q: 10. A reaction at 45 °C has the following enthalpy and entropy: AH° = -86.6 kJ and AS = 382J/K. a.…

A: ∆G°=∆H°-T∆S° If ∆G° = -ve, the reaction will be spontaneous. If ∆G° = +ve, the reaction will be…

Q: Identify the bond with the lowest bond strength. C=C C=N N-N O C=O

A: Left to right in a group electronegativity increases. Electronegativity order C<N<O  Left to…

Q: The electronegativity is 2.1 for H and 2.8 for Br. Based on these electronegativities, HBr would be…

A: The solution is given below -

Q: Homework For each of the following metal complexes, indicate the following: the formal oxidation…

A: Th aim of this question is to the ordering with respect to oxidation state and coordination number,…

Q: Nitrogen monoxide has been found to react with oxygen gas to produce the brown gas nitrogen dioxide.…

A: Given :  Heat released when one mole of NO reacts = 57 KJ

Q: Which Group would this element NOT fit into?

A: 1. Group 1 elements are called alkali metals, Group 4 consist of transition metals like Titanium,…

Q: Briefly explain why your results may not match with the expected empirical formula, and propose how…

A: The expected empirical formula is Fe2O3.  The empirical formula obtained from experimental results…

Q: Provide names for the following five nitrogen containing organic molecules. c) CH3 CH3 CH3 N-CH₂-CH3…

A: IUPAC nomenclature used for the systematic naming of the organic molecules. According to IUPAC…

Q: 8-6. 8-7. Dry ice is solid carbon dioxide. It sublimes readily. Suppose there is a 25.0 liter glass…

A: 8.7 ) First we calculate moles of hydrogen gas , then we would use stoichiometry relation to…

Q: A. Three common reducing agents are listed below. Give an example of a reaction that is done with…

A: The objective of this question is to explain about given reducing agents.

Q: 1 Based on your observation, how can you identify the intermolecular forces of liquid on a given…

A: 1. Longer it takes to evaporate from surface of coin higher is the strength of intermolecular forces…

Q: 2. Regarding the extraction experiment, which of the following statements is true? a) A drying agent…

A: TLC, or Thin Layer Chromatography, is a chromatographic technique used to separate and analyze…

Q: 4) What volume will a 4.67 g object occupy if its density = 7.86 g/cm³? 5) The density of mercury…

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Q: SECTION 1: KNOWLEDGE 1. Stainless steel is a variety of steel that resists corrosion. Your cutlery…

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Q: Draw a structural formula for the symmetrical acid anhydride that forms from 2,3-dimethylbutanoic…

A: Amide are organic compound which have CONH2 functional group And anhydride are functional group…

Q: For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4d orbital…

A: To caluclate the wavelength of any spectral in hydrogen atomic emission spectrum Rydberg gave an…

Q: H. Build the following molecule a) and then build and draw its mirror image b). CH 3 -C-H a) Br-…

A: First, we have to observe whether the molecule has any plane of symmetry, if it does, it's a meso…

Q: 1 You cut a piece of paper into small pieces. Is this o physical or chemical change? Explain your…

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Q: The starting material below undergoes a Wittig reaction to produce the product shown. This seems…

A: Given molecule is The other reactant is: They undergo Wittig reaction and form the product alkene…

Q: Which of the following could enter into H-bonding interactions with water? (Select all that apply.)…

A: Molecules 1,2and 4 is able to form hydrogen bonding intercation

Q: 5) A medical institution requests 1 g of bismuth-214, which has a half life of 20 min. How many…

A: Introduction :  Half-life of a reaction can be defined as the time taken by one reactant to…

Q: Determine the molecular geometry for the C3 atom in the following structure. 2 3 4 5 H,C=C-C=C-CH3 H

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Q: 3. A radio wave has a frequency of 3.8 x 1010 Hz. What is the energy photon of this radiation? 4. An…

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Q: 7. Reaction of HBr with (R)-3-methylhexan-3-ol yields (±)-3-bromo-3-methyl- hexane. Explain. OH…

A: Since you have asked multiple questions we will answer the first one for you. To get the remaining…

Q: 1. Which of the following is NOT an example of physical property? B. Length A. Texture C. Intensity…

A: Physical property is a characteristic of matter that can be observed and measured without changing…

Q: 1. The mass of one mole of an element is equal to the substance's molecular weight 2. A mole of…

A: 1. The mass of one mole of an element is equal to ________ 2. A mole of Carbon contains 6.02 x 1023…

Q: 16.13 Draw plausible structures and give the electron count of la) Ni(n²-C3Hs)2, (b)…

A: 18 electron rule refers to have 18 valence electrons around the metal in the coordination complexes…

Q: 4. How much energy is needed to heat a 35.5g sample of ice at -17.5°C to liquid water at 77.3°C?

A: “Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: The dicarboxylic acid, propanedioic acid, can form a polyester with 1,2-ethanediol. To illustrate…

A: The solution is given below -

Q: 3 Which type of emission has the highest penetrating power? gamma O alpha O beta O positron 4 Which…

A: These are the question based on the property of different types of radiation. Based on the property…

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.