If pure polonium-210 (k = 5.02 x 10-3 day-1) were used in a crime, based on radioactive disintegration alone, how long would it take for 30% the original isotope to disappear?

Q: Propose a synthesis for the following transformation: `Br 1) NaCN NH2 1) excess CH3! Br 2) xs LAH 3)…

A:

Q: What is the absolute configuration of the carbon in the given molecule below?

A: Given : We have to write the absolute configuration of given compounds.

Q: mass of the body re

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

Q: The combustion of 1 mole of a liquid hydrocarbon (molar mass 114 g/mol) in excess oxygen releases…

A:

Q: In the first step of the synthesis (shown below), which of the following reaction conditions could…

A: In this given step, an aldehyde is converted to alcohol, this is a reduction process. So reducing…

Q: Draw the product of this reaction. Ignore any counter ions or inorganic byproducts. NH2 CH3COCI…

A:

Q: Calculate the pH of a solution of at 25°C made by adding 28.5 g of HCl to 250 mL of H2O.

A: HCl is a strong acid , so it dissociate completely. To calculate pH , we would first calculate…

Q: QUESTION 5 Which of the following are natural synthons? (а) (b) e OH (c) O (d) -CO2H O (a), (b) O…

A: synthons: In retrosynthetic analysis of any compound, a synthon is a hypothetical unit within a…

Q: Consider 4.30 L of a gas at 365 mmHg and 20. °C. If the container is compressed to 2.30 L and the…

A: Given :-  Initial pressure = 365 mmHg Initial volume = 4.30 L Initial temperature = 20°C Final…

Q: INCORRECT about strengths of acids?        HClO is stronger than HClO2                HClO2 is…

A: Stronger acid easily ionized in aqueous solution.  In oxyacids higher the oxidation number of…

Q: Calculate the average ribbon speed in an automated tabber/stringer with an hourly capacity of 80 6"…

A: Given that capacity/hour =8006'' cells.

Q: Question 5 Carbohydrates that undergo hydrolysis only are analyzed using gas chromatography. O True…

A: Chromatography is technique for the seperation of mixture into its compound.

Q: what is the molecular geometry of cyclopropane and the hybridization ?

A: Cyclopropane is a cyclic alkane.

Q: QUESTION 1 How does hydroxide/alkoxide accelerate the Suzuki reaction? O Both enhances reductive…

A:

Q: Chlorine dioxide (CIO,) is a disinfectant used in municipal water- treatment plants. It dissolves in…

A: First write rate with given values and then solve for order of ClO2. Consider order for ClO2 is x…

Q: Identify the reaction of the following reaction: a. formation of (R)-1-methoxypentane from…

A:

Q: In the titration of 100.0 mL of 0.050 M HCl solution, what will be the pH after adding 30.0 of a…

A: Molarity = number of moles/volume (L)  So, moles = molarity × volume (L)  pH = -log[H+]

Q: What is the mass of H2SO4 (molar mass 98 g/mol) in 400. mL of 0.100 M solution? O 3.92 g O 4.90 g…

A: Given, Concentration of the solution = 0.100 M= 0.100 mol/L Volume of the solution = 400.0 mL = 0.4…

Q: For the reaction below, which one of the following possible products is most likely to form?…

A: Organic compounds can be defined as the compounds containing carbon and hydrogen atoms. For example…

Q: What would be an appropriate term to describe molecules B and C? in A В Me `Me Me resonance…

A: Molecule A is conjugated. B and C are skip diene

Q: The multi-step synthesis shown in the box below will be evaluated over the last several questions on…

A: 2° alcohol on oxidation with PCC (pyridinium chloro chromate) gives ketone...

Q: In monounsaturated fatty acids, the presence of a double bond is usually found at the position…

A: Fatty acid can be saturated , mono-unsaturated or poly-unsaturated.  Saturated fatty acids doesn't…

Q: How many moles of sodium hydroxide would have to be added to 250 mL of a 0.435 M acetic acid…

A:

Q: multiple steps H. https://ibb.co/HVSLHCZ e In the fourth step of the synthesis, the Grignard reagent…

A:

Q: en deciding between 1,2-addition, 1,4-addition and the major reaction pathway, there's ually an…

A:

Q: Determine which side of the junction will be positive in each Ion Mobility (m²/s-V) of the liquid…

A: Liquid junction potential : When two solutions of different concentration comes in contact , a…

Q: True or False.  A 0.10 M HCl solution will consist of 0.10 M H+ and 0.10 M Cl-.

A: Given statement :- A 0.10 M HCl solution will consist of 0.10 M H+ and 0.10 M Cl-  To determine :-…

Q: What is the nickel ion concentration in a solution prepared by mixing 397 ml. of 0.353 M nickel…

A: Given: Concentration of Ni2+ (from Ni(NO3)2 ) = 0.353 M Volume of Ni2+ solution = 397 mL = 0.397 L…

Q: Consider a fuel cell that works by reacting 7.2 g of liquid methanol with oxygen to form liquid…

A: Concept: Fuel cell: A fuel cell is an electrochemical cell that converts the chemical energy. Here…

Q: Complete the followsing reactionse a. CH20H + CH3CH2-ott Ho Cit2OH CHO otH +Cu+ CH20H CH3 + ClHz CH…

A:

Q: Exercise 9.83 In the first chapter of this book, we described the scientific approach and put a…

A: # We can predict magnetic behaviour of any molecule by Lewis theory. If it has unpaired electrons,…

Q: The following are open-chain compounds, EXCEPT: O phosphoacylglycerols O triacylglycerols steroids…

A:

Q: At the edges of the paper which you happened to touch with sweated hands, what can you conclude…

A: Chromatography is totally based on capillary action. So if we hold the paper in the middle, then…

Q: reversibly to ammonia and hydrogen iodide. NH4I(s) ↔  NH3(g) + HI(g) At 400°C, Kp = 0.25.…

A: Partial pressure of solid components is equal to one

Q: 39.) You have a solution of 70 mL of 1 M HCl and 90 mL of 0.6 M HCO3, what is the pOH of the…

A: Concept: HCl is a strong acid and HCO3- is a weak base so they will react to form salt and then if…

Q: The limiting reagent is

A:

Q: 3- Br | Br Cl C Fe Cl Br Cl raw another isomer below.

A: Given : We have to make another isomer of [FeBr3Cl3]3-

Q: Which of the following will produce an acidic aqueous solution? CaO Na2SO4 NH4NO3 Na3PO4

A: Given salts are  CaO Na2SO4 NH4NO3 Na3PO4 We need to identity aqueous solution of which of the…

Q: (1) Structures __________ and ____________ are enantiomers. (2) Structures __________ and…

A: Given; structure

Q: The decomposition of nitramide in an aqueous solution at 25 °C NH2NO2(aq)N2O(g) + H2O(l) is first…

A:

Q: In the titration of 100.0 mL of 0.050 M CH3COOH (pKa = 4.74) solution with a 0.10 M NaOH titrant,…

A:

Q: tempratore of the . ण र 0 + +hए flask वंत्य लिए कतकणवहछ ० co4 ०नी CO

A:

Q: Which of the following is NOT a polyprotic acid?       H2S…

A:

Q: arting with sodium azide as your source of nitrogen and using any other reagents of your choice,…

A: Sodium azide are strong nucleophiles gives SN2 reaction

Q: come to equilibrium. The equilibrium concentration of COBr2 was 0.25 M. What is the value of Kc for…

A:

Q: Using the mnemonic device, draw the structure of a heptapeptide with the following amino acids:…

A: We have find out the structure of a heptapeptide.

Q: Draw structures for the carbonyl electrophile and enolate nucleophile that react to give the enone…

A: Given: product

Q: 4. A quantum simple harmonic oscillator can be treated as a particle of mass m attached to a spring…

A: Concept:  Energy of quantum simple hormonic oscillator:    E = (n+1/2)hv  Where  E = energy  n =…

Q: Here is an isomer of the [FeBr,Cl,(OH)] complex: 3- Br CI Fe Cl OH Br Draw another isomer below.

A: In octahedral complexes (CN = 6) , there are two kinds of bonds  Equatorial bonds : The bonds which…

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.