Technetium-99m has a half-life of 6.01 hours. If a patient injected with technetium-99m is safe to leave the hospital once 75% of the dose has decayed, when is the patient allowed to leave?

Q: mass

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Q: This question is based on the five compounds (A-E) given below. CH;-CH=CH-CH3 (B) (C) (A) CHCI=CHBR ...

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for ...

Q: 3. Draw the electrochemical cell for the following reaction: Alo + OCI () +HOm → Cl) + OH( + AP*) a)...

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Q: The radioactive decay of a certain isotope of lead is a first-order process that has a half-life of ...

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Q: NH2 CH3 C-OH NH Br Bromoaniline Acetanilide Benzoic acid Now you've received a mixture contains thre...

A: Practical organic chemistry:

Q: Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for denta...

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Q: You titrate 0.1 L of 0.2 M HCI with 0.1 M NaOH. The half equivalence point will be reached when adde...

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Q: Gaseous butane (CH;(CH,) CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide ...

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Q: i) Balance the equation below for the formation of one mole of ammonia, NH3, from its elements.     ...

A: Mean Bond energy of H-H = 436 kJ/mol Mean Bond energy of C-C = 348 kJ/mol Mean Bond energy of N-N = ...

Q: ixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseou...

A: The sign convention for heat flow are as follows: When the heat flows into the system, a positive si...

Q: What is the name of the non-reducing monosaccharide found in the disaccharide shown here? но H. H. Н...

A: Nonreducing disaccharides can be defined as the disaccharides having glycosidic bonds between their ...

Q: e enthalpy change (AH) of a reaction is the transition state. Directly proportional to Independent o...

A: Enthalpy change of a reaction is the difference between the enthalpy of the product and the enthalpy...

Q: Gaseous butane (CH;(CH,),CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide ...

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Q: O2P 2p, 2рх 2р, 2рх 2ру 2р, 2pх 2ру Px 2py O2P O2p TT 2p 02s 2s O2s 2s 2s 2s 02s

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Q: the percent yield of water.

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Q: What is the molecular formula of the molecule with molecular mass of 120.12g/mol. and an empirical f...

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Q: (ii) Calculate the enthalpy change for the dissolution of (NH4)2SO4(s) using the enthalpy of formati...

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Q: A practitioner will make a titration curve. The practitioner pipetted 10 mL of 0.1 M HCl solution an...

A: "Since you have asked multiple questions, we will solve the first question for you i.e  (HCl vs NaOH...

Q: ne theoretical yield of

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Q: For the following compound, the given name is not correctly following the IUPAC naming conventions. ...

A: IUPAC NOMENCLATURE RULES : 

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.45 kg sample ...

A: Given,  Mass, m = 1.45 kg = 1450 g  Initial temperature, Ti = 36.3 °C  Final temperature, Tf = 56.3 ...

Q: Draw the starting alkyne that would lead to this major product under these conditions. Select to Dra...

A:  Alkynes undergoes oxymercuration to form ketone

Q: What gas should we use to separate two compounds with very similar boiling points

A: solution is shown below.

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

A: Weight of hexane = 20.7 gm Weight of O2 = 67.9 gm  

Q: Draw the products of each reaction

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Q: What is the rate law for the given reaction? rate KS208) rate = KS2081 rate = kS2081?

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

Q: You titrate 0.1Lof 0.2 M HCI with 0.1 M NaOH. The half equivalence point will be reached when added,...

A: .

Q: O RBCI

A: Moles = mass / molar mass Molarity =Moles/Volume (L) As we know, Higher the molar mass of solute, lo...

Q: Question 4 - - For the following two compounds, the given names do not correctly follow IUPAC naming...

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Q: A sample consisting of 2.00 mole of an ideal monoatomic gas is expanded isothermally at 22°C from 22...

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Q: "Pu nat fraction of pre

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Q: Consider the reaction 2NCI3 (e) + N2 (g) + 3Cl2 (g) K,= 0.001 A set of equilibrium pressures are P(N...

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Q: 2. Draw a stepwise mechanism for the following reaction. Use curved arrows to show electron flow. In...

A: Deprotonation of Acetals:

Q: Why is NaOH stored in rubber - stoppered bottles?

A: To explain :- Why we stored NaOH in rubber - stoppered bottles

Q: Gaseous methane (CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (Co,) an...

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Q: (CH,(CH.),CH;) CH; reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (Co,) and g...

A: We first need to determine the limiting reagent. After determining the limiting reagent, we can calc...

Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 6....

A: As given that heat flow out of  the water that  means heat is lost by it and it's temperature would ...

Q: What is the name of the sugar shown here? OH OH O L-xylose O D-xylose O D-erythrose O L-erythrose O ...

A: To identify the name for given Sugar.

Q: The equilibrium for the formation of dinitrogen tetraoxide gas (N2O4) from nitrogen dioxide (NO2) st...

A: We know that Kp = Kc(RT)delta(n) where ∆n = moles of gaseous products - moles of gaseous reactants

Q: 1.0 x 10-11 moles of HCl are added to 1.OL of H20. What is the pH? О 3.0 O 10.0 O 11.0 О 1.0 O 7.0

A: Moles of HCl = 1.0 × 10-11 moles Volume of water = 1.0 Liter

Q: The rate of deposition of copper (mass deposited per unit time) on the cathode depends on: a) The su...

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Q: The equation 96 250Cm-?+ Sr+4n is correctly completed as 96 250Cm→ 14Ce+ 2Sr+4{n. A) True B) False

A: we see the mass number of Cm on the left hand side is 250 and on the right hand side of the equation...

Q: percent yield of carbon dioxide.

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Q: Acetylene (C,H, gas is often used in welding torches because of the very high heat produced when it ...

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Q: For an exothermic solution, which of the following statements is true? A) The solute will be more so...

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Q: The reaction for the decomposition of ammonia into its elements is: 2 NH3 (g) → N2 (g) + 3 H2 (g) [N...

A: Given data :  1. [NH3] = 0.505 M  2. [N2] = 0.0105 M  3. [H2] = 0.414 M     

Q: Consider the following half-reactions: Half-reaction E° (V) I2(s) + 2e 21(aq) 0.535V Cu2+(aq) + 2e¯ ...

A: we have given the reduction potential values: 1) higher the reduction potential, the strongest the o...

Q: What is the pH of a solution containing 0.57 mol L-1 of a diprotic acid with pKA1 = 5.36 and pKA2 = ...

A: Answer: 2.80

Q: For the following descriptions of molecules, draw the Lewis structure (showing all atoms, lone pairs...

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Q: 3. Calculate the kg/cmol for Ca*2 (review the calculations from Lab 1). If a soil can retain 25 cmol...

A: Answer and explanation is given below hope you like it.