Radium-226 has a half-life of 1600 years. If a sample of radium-226 has a mass of 512 milligrams, what mass of the radium-226 will remain after 8000 years? O 16 milligrams 102 milligrams 32 milligrams 64 milligrams Question 18 Itranscript For a particular reaction, the value of Keq is 1.23 x 104. For this reaction, the value of delta-Gº, will be_____(R)______ and the value of Eºcell will be ____(S)______ What are R and S? R = negative and S = positive R= negative and S = negative OR= positive and S = positive R= positive and S = negative

Q: Suppose the galvanic cell sketched below is powered by the following reaction: Mn(s)+PdSO₂(aq) →→…

A: Note: As per the guidelines solution of first question has been made and for the expert solution of…

Q: ELECTROCHEMISTRY Using the Nernst equation to calculate nonstandard cell voltage A galvanic cell at…

A: Recall the given reaction,                                   3 Cu2+ aq + 2 Al s → 3 Cu s + 2 Al3+ aq…

Q: - - Eto son

A: The question is based on the concept of organic synthesis.  we need to synthesize the product using…

Q: A chemical engineer is studying the two reactions shown in the table below. In each case, he fills a…

A: Value of ∆G or ∆S can be calculated using relation :∆G = ∆H - T∆S reaction is spontaneous if ∆G is…

Q: Question 1 (AC2.1 and 2.2) You are now supplied with another set of results from a rate…

A:

Q: 400.0 mL of a 0.470 M solution of NaCl is diluted to 900.0 mL. What is the new concentration of the…

A: Initial volume (V1)= 400.0 mL = 0.400 L Initial  molarity (M1) = 0.470 M Final volume (V2)=900.0 mL…

Q: A 0.04373 g sample of gas occupies 10.0 mL at 291.0 K and 1.10 atm. Upon further analysis, the…

A: Given that: Mass of the sample = 0.04373 g The volume of the sample = 10 mL Temperature = 291.0 K…

Q: Which product is expected for the reaction shown below? N3 O A OB OC OD Br A HO B 1. NaN, 2. LIAIH…

A: This question based on find out product

Q: Calculate the energy change when 25.0 g of magnesium changes from 27°C to 45°C. The specific heat of…

A:

Q: Show how you can carry out the following multi-step transformations starting with benzene and any…

A: The question is based on the concept of organic synthesis.  we need to synthesize the product using…

Q: A microwave is found to emit electromagnetic radiation with a frequency of 229 MHz. Determine the…

A:

Q: A solution of acetic acid (CH3COOH) and water is boiling at 103.1 °C. A sample of the vapor above…

A: In  condensed liquid of 100 g (Let say) Acetic acid is 50%  i.e  50 g Water is 100%-50% = 50% i.e.…

Q: 25°C: a. CO(g) + 2H₂(g) → CH₂OH(1) b. N₂(g) + O₂(g) → 2NO(g) c. 2NaCl(s) + F₂(g) → 2NaF (s) + Cl₂(g)

A:

Q: A galvanic (voltaic) cell consists of an electrode composed of magnesium in a 1.0 M magnesium ion…

A: In an electrochemical cell, the chemical energy due to the chemical reactions is converted into…

Q: 4. Show the mechanism and any intermediates formed in the following reaction. a. b. ook A A ook of

A: Pericyclic reactions are stereospecific, no reagent is required, usually takes place in presence of…

Q: Calculate ΔΗ. for the reaction: rxn Zn(s) + S(s) + 2 O₂(g) → ZnSO4(s)Math output error Using the…

A: Given reactions are , reaction: 1 ZnS (s) ---> Zn (s) + S (s)     ∆H°rxn = 456 kJ/mol  reaction:…

Q: The compound shown below is the product of a Claisen condensation. Draw structural formulas for the…

A:

Q: Hydrazine, N2 H4, can be used as a reducing agent in a fuel cell. N2 H4 (g) + O2 (g) " N2 (g) + 2 H2…

A: Answer: Gibbs free energy change for any reaction is always equal to the difference between Gibbs…

Q: ) AGº for a chemical reaction is -18.3 kJ/mol. Determine the equilibrium constant for this reaction…

A: ∆Go=-18.3 kJ/mol Temperature = 355 K

Q: Show how you can synthesize the product from the starting material (no narrative text!). Include…

A: Ethyl acetate (EtOAc) is a colorless, clear, and flammable liquid with a fruity odor. It is a common…

Q: A voltaic cell was constructed using a Cr(s)/Cr³+ (aq) half-cell anode and a Sn(s) Sn2+ (aq)…

A:

Q: 102 100 90- 80- 70 a 60- 50- 40 30 26- 2934.78cm-1 2500 3000 2861.80cm-1 2500 1705.60cm-1 2000 $750…

A: The question is based on the concept of  IR spectroscopy. we need to assign bands to the given…

Q: 35. A 100 mL sample is titrated to the methyl orange (alkalinity color indicator) end point with 2…

A: A 100 mL of water sample is titrated with 0.5 N H2SO4 and the end point was observed at 2 mL using…

Q: How can we answer these questions? 1) What other methods could you have used to identify the unknown…

A: The pH of a solution is a great and simple way to determine whether the solution is acidic in nature…

Q: HO. serotonin Melatonin Derivative NH₂ A) CH3Br/KOH B) CH3CH₂Br/KOH C) CN: /NaBH3 D) CH3CI/Acetone…

A: The given reaction scheme is shown below We have to give the reagents for each step. Also, we have…

Q: For the reaction 2NO + Cl₂ Match the appropriate rate law to each postulated mechanism. A Rate =…

A: Rate law of reaction is directly proportional to the molar concentration of reactant raised to…

Q: Suppose that while titrating a vinegar sample you suddenly realize that you forgot to add the…

A: The question is based on the concept of titrations. we need to predict the effect of indicator and…

Q: Apply the significant figure rule to the final answer.  a formula page is attached. Decide what…

A: According to Dalton's law of partial pressure: The total pressure (Ptotal) exerted by the mixture of…

Q: A 32.2 mL aliquot of weak acid that has a concentration of 0.546 M will be titrated with 0.846 M…

A: The question is based on the titrations.  we are titrating a weak acid with a strong base. we need…

Q: A galvanic cell is constructed with a cobalt electrode in a 1.0 M CO(NO3)2 solution, and a cadmium…

A: An electrochemical cell is a device that converts chemical energy into electrical energy or vice…

Q: Which amino acid has a negative charge at physiological pH? H₂N- NH3 CH₂ CH₂ CH₂ CH₂ COO™ Lysine…

A: This question belong to Biomolecules of organic compounds.

Q: When ligand dissociation occurs on a transition metal complex, how many electrons are lost around…

A: Coordination complexes are those consisting of a central metal atom surrounded by atoms or group of…

Q: Propose a reasonable mechanism for the following reaction. F F F OH K₂CO3 heat F F F F

A: The above question is based on organic reaction and mechanism. We have to write the mechanism for…

Q: Select the best conditions for the reactions. (a) eve Br H3C H3C (b) CH3 CH3 Br e H3C CH3 CH3 CH3…

A: Nucleophilic substitution reactions are two types  (1) SN1 (unimolecular nucleophilic substitution)…

Q: 2Cu²+ (aq) + Mg (s) →→→ 2Cu+ (aq) + Mg²+ (aq) Determine the equilibrium constant (K) of this…

A: The question is based on electrochemistry . we need to calculate equilibrium  constant for the given…

Q: What is the concentration of free Au+ in 8.8736e-5 M AuNO3 and 1.0094 M NaCN? Au+ + 2 CN- →…

A: we have to calculate the concentration of free Au+

Q: Which reagent(s) will accomplish the transformation shown below? Select one alternative: H O 03…

A: This is an example of reductive ozonalysis

Q: A scrambled character table for a polyhedral point group is shown here, though missing a couple of…

A: To predict the (a) order of a polyhedral point group. (b) number of classes for a polyhedral point…

Q: Construct a galvanic cell from MnO4- (aq)/MnO2 (s) and H2 O2 (aq)/H2 O (l). a) Write a balanced…

A:

Q: A justification for the rankings based on the factors that influence the relative stability of the…

A: Acidity is defined as the ability of a molecule to release protons.  if a compound  easily donate…

Q: Classify these amino acids as acidic, basic, neutral polar, or neutral nonpolar using the dropdown…

A: we have to classify the given amino acids

Q: ThO₂ (s) + 4H+ → Th4+ (aq) + 2H₂O(l) How many milliliters of 1.55 M HCl(aq) are needed to dissolve…

A:

Q: Which of the following postulates of Dalton's atomic theory are now known to be incorrect? Select…

A: According to Dalton's atomic theory, Matter is made of atoms  All atoms of given element are…

Q: OH ai i i OMe Select one alternative: OO OMe OH OH reaction 'a' can be achieved with H₂ in the…

A: We know strong reducing agent reduces both ester and ketone carbonyl whereas weak reducing agent…

Q: C acetic acid NH

A:

Q: Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free…

A:

Q: e) Write the displayed formula for 2,3-dimethylpentane. f) Write the skeletal formula for…

A: The following rules must be followed to draw the structures of the compounds if the name is given 1.…

Q: Using the relationships imposed by the orthogonality theorem, predict the characters, XK(R), that…

A:

Q: Carbohydrate Esterification What effects does the catalyst have on the product? What is the…

A:

Q: A B Give the organic product: & Маскарие NaBH4 ? which! H+ heat C D OH

A: NaBH4 is a weak reducing agent which can reduce a ketone to a secondary alcohol and an aldehyde to a…

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.