After 3 days a sample of radon-222 has decayed to 58% of its original amount. (a) What is the half-life of radon-222? (Round your answer to two decimal places.) days (b) How long will it take the sample to decay to 30% of its original amount? (Round your answer to two decimal places.) days

Q: Calculate the value of [H3O+ ]and [OH− ] in each solution: a. 0.0001 M NaOH b. 0.0001 M HCl

A: Here, we have to calculate the value of [H3O+] and [OH-] for: 0.0001 M NaOH 0.0001 M HCl

Q: Which of the following is TRUE for a nonspontaneous process? Which of the following is TRUE for a…

A:

Q: If light has a wavelength of 795 nm, what is the energy of this light expressed with units of…

A:

Q: Each of the following sets of quantum numbers is supposed to specify an orbital. Find the one set of…

A: Quantum numbers are used to describe the position and energy of the electron in an atom. In the…

Q: weight % Fe (in chalcopyrite) ive also added the formula just incase

A: To calculate % of Fe in chalcopyrite as per the given formula

Q: Calculate the standard enthalpy of formation of solid magnesium sulfide (MgS) using the following…

A: Given : thermodynamic data

Q: 5. Draw the molecular-level picture that shows the particles present in water when each of the…

A: Compounds dissolved in water which are ionic in nature or which possess Hydrogen bonding.  Ionic…

Q: pH = 11.7 Express your answer using one significant figure.         [H3O+][H3O+] =   MM

A: Hydronium ion concentration is an important parameter of an aqueous solution. The concentration of…

Q: 1. Write down the products of the 2- chlorobutane removal reaction in the presence of the cyanide…

A: The reaction involves the E-2 mechanism for the formation of the product. The product formed is…

Q: Draw structures for the following alkenes.

A: Given : name of compounds

Q: 3. (a) b C. d. e. f. Given 0.01 Molar concentration Au³+ ion and 0.01 molar of Ag+ ion, and the…

A:

Q: Homework Unanswered obtained via gas chromatographic purity analysis, what is the acceptable…

A: Gas chromatography is used to study the compounds which are volatile in nature.

Q: Write the complete ionic equation for the reaction that takes place when aqueous solutions of…

A:

Q: measure the enthalpy of the reaction, 125 g of water and 50 g of pure hydrochloric acid are placed…

A: Given 125 g of water and 50 g of pure hydrochloric acid are placed in a calorimeter Initial…

Q: Complete each arrow-pushing mechanism and identify each reactant as a nucleophile, electrophile,…

A:

Q: 1. Why would deficiency of copper produce anemia?

A: Deficiency of copper produce disease like anemia the reason would be explained in step 2

Q: 4. Consider the following: Zn²+2e-→ Zn The wire -0.76 V Cr²+2e-→ Cr -0.91 V How many coulombs were…

A: Electrochemistry is branch of chemistry in which we deal with oxidation and reduction reaction.…

Q: 3. (a) Consider Consider the following: Zn²+2e-→ Zn -0.76 V Cr²+2e- Cr EE -0.91 V Assuming that…

A: Given equations are :  Zn2+ + 2e- -------------> Zn , E0 = -0.76 V  Cr2+ + 2e- ------------->…

Q: AlPO4 + Caso

A:

Q: 4. A student measures an initial temperature of 25.00 °C for a 100.0 gram sample of water in the…

A:

Q: dehydrohalogenation (E2) reaction shown, draw the Zaitsev product(s) resulting from elimination…

A: According to Zaitsev rule, the more substituted alkene will be the major product during elimination…

Q: 100- 80- eb 40 28 4898 302 са Hо 02 3500 2939.89 3030 12 क 2828.88 2739.27 m 10.0 9.5 9.0 8.5 8.0…

A:

Q: Draw Mechanism and explain stereochemistry of the products يكو + CH3OH → o OCH3 up OCH3

A: This reaction undergo via SN1 mechanism first it dissociate to form carbocation followed by attack…

Q: Write the complete electronic configuration in spdf notation. (Not the short version) 1) S2- 2) Ga,…

A: we have to determine the electron configuration of  1) S2-2) Ga3) Ca2+

Q: Consider this structure, where X and Y represent generic elements. X—X—X What shape would this…

A: Here a structure is given. We have to determine the shape of this molecule in three dimensions and…

Q: It takes 146. kJ/mol to break an oxygen-oxygen single bond. Calculate the maximum wavelength of…

A: Given, Amount of energy required to break one mole of Oxygen single bond = 146. kJ/mol maximum…

Q: Assuming all of these reactions are entropy driven, which of the following reactions would shift to…

A:

Q: How many carbon atoms are present in 0.2523 g of retinal (C20H28O, molar mass=284.4 g/mol)?

A: The carbon atoms in 0.2523 g of retinal can be calculated as:

Q: a. Br₂(l) is [Select] b. C8H18(l) is [Select] c. AgCl(s) is [Select] d. PC13(s) is [Select] ✓in…

A: Solubility follows a general rule like dissolve like this means that polar solutes are soluble in…

Q: 9. If a redox reaction has oxidation potential of 1.5V and reduction potential of -0.5V, will the…

A: 9) Given :- Oxidation potential = E0oxidation = 1.5 V  Reduction potential = E0reduction = -0.5 V…

Q: What is the cell notation for the voltaic cell comprised of the Zn2+|Zn electrode and the Fe2+|Fe…

A: Cell notation: cell notation is used to represent the electrochemical cell reaction. Anode half cell…

Q: Direction: Solve for the standard Gibbs Free Energy of the following problems and show complete…

A:

Q: What is the cell notation for the cell comprised of the Cu2+|Cu electrode and the Fe3+|Fe2+…

A: We are given two electrodes and asked to write the cell notation for respective galvanic cell.

Q: Start with a 450 ml sample of .45 M Hydrofluoric Acid (HF). What is the pH? If you buffer the…

A: HF is a weak acid. By adding strong base NaOH, we can get a buffer solution of NaF.…

Q: Arrange the following compounds according to decreasing melting point. Write only the letters. 1. A.…

A: Melting point of a compound depends directly on the intermolecular interactions present. More is the…

Q: d. Br

A: IUPAC nomenclature is used for naming the organic compounds as recommended by international union of…

Q: 5. Consider the reduction of Mn" ----> MnO. Which statement is true? viaqua nowoqp (s) (a) 4…

A: Electrochemistry is the branch of chemistry in which we deal with redox reactions.Redox reactions…

Q: At 2590 °C the equilibrium constant for the reaction: 2 BrCl(g) Br₂(g) + Cl₂(g) is Kp = 0.836. If…

A:

Q: Choose all of the statements from below which are true about oxidation and reduction. Oxidation and…

A: we have to determine which of the given statements is true

Q: Using Ethylene, C₂H₁, and methyl bromide, CH,Br, as your sole sources of carbon, propose a synthesis…

A: To prepare tertiary butyl alcohol using ethylene and methyl bromide as the only sole sources of the…

Q: Ammonium phosphate ((NH₂), PO) is an important ingredient in many solid fertilizers. It can be made…

A: Given , moles of ammonium phosphate produced = 0.080 mol

Q: Data and Results LAB 8B ) Classify the following alcohols as primary secondary or tertiary. I) OH…

A:

Q: Using data found in Appendix E of your textbook calculate the nonstandard emf for each of the…

A: According to guidelines we are supposed to answer only first three parts. If you want rest of the…

Q: use the ideal gas law P=nRT/V for the TV^(gamma-1) derivation and PdV=nRdT-(nRT/P)*dP how to get the…

A:

Q: 3. A 500.0 mL lead (I) nitrate solution contains 15.5 g lead( (1) nitrate. a. What is the…

A:

Q: If 1000 g of a 20 wt% Ag-80 wt% Cu alloy is slowly cooled from 1000 C to just below 780°C. How many…

A: Given , Alloy sample mass= 1000 g

Q: Calculating standard reaction free energy from standard... Using standard reduction potentials from…

A:

Q: Which substance conducts electricity in the molten state but not in its solid state? Li BaCl2 C…

A: Whether a substance can conducts electricity or not , it depends on the electrons present in the…

Q: Argon gas has several industrial uses, including arc welding and steel making. Argon is nonflammable…

A: Given :  Volume of cylinder = 172 L  Temperature = 21.5 ° C = 294.5 K  Pressure = 213 psi  Gas…

Q: Homework: Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid solution (keep…

A: The pH of the acid solution is 3.0 and its volume is 2.0 mL. The pH of the base solution is 10.0 and…

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.