A radioactive substance decays at a rate proportional to the amount present. If 45 percent of a substance decays in 20 years, what is the half-life of the substance? 27.8 years 25.2 years 23.2 years 17.4 years

Q: L. Please give the principal organic product(s) of each reaction, a) 1. O3 2. Zn/H,O b) Na/NH, c)…

A: Given,

Q: What is the percent of each halogen in a 0.4712g mixture of sodium chloride and barium chloride…

A:

Q: At what position, and on what ring, would you expect the following substances to undergo…

A: ✓Given reaction is an example of electrophilic substitution reaction.An electrophilic substitution…

Q: What is the effect of mobile phase on each (known) sample when doing Gas Chromatography?

A: The detailed solution of the given question is as under.  The concept used here is from…

Q: ins 2.70% (w/v) of vitamin C. What volume would you have to 2 does % w/v mean there one grams 51…

A: ✓Vitamin C is also called ascorbic acid.Its chemical composition is C6H8O6

Q: CH, — CH, CH,— CH,—NH, Your answer CH₂-CH₂-CH₂-O-C-CH₂-CH₂ 0 Your answer CH₂-CH₂-CH-CH₂-CH-CH₂ I OH…

A:

Q: 1. A student synthesized 3.214g of Ni(NH3),Cl2 from 4.023g of NiCl2 6H₂O. He dissolved 0.81g of…

A: To find out the concentration of Ni2+ and the mass percent of nickel in the product.

Q: The following are intermediate products in the stepwise synthesis of compound 1 from benzene. Give…

A:

Q: What is the molar concentration of potassium? * Your answer What is the molar concentration of Hg? *…

A:

Q: For the aqueous [Hg(NH3)4]2+ complex Kf=1.911019 at 25°C. Suppose equal volumes of 0.0090M HgNO32…

A:

Q: What is true when acids and bases neutralize each other? O The amount of H* and OH is the same O The…

A: When acid is react with base it will form salt and water called neutralization

Q: 4. In an isobaric process, the heat received by any system is converted to work. 5. A system…

A: 4. False,  (Isothermal process) 5. True 6. False,  (Adiabatic wall) 7. True

Q: Que find out the product 2. 11 -Q the pt

A: Here we are required to find the product of the reaction

Q: what is the pOH of 5.6 x 10^-4M HCI

A: Given that:  [HCl] = 5.6×10-4M HCl is strong acid.

Q: A solution was prepared in the lab from equal volumes of lithium fluoride and zinc chloride. If the…

A: The concentration of lithium fluoride = 4.00×10−4 M The concentration of zinc chloride= 1.00×10−4 M…

Q: Draw the major product of the reaction of 1-butanol and the following reagents. (a) PBr3 (b) SOCI₂,…

A:

Q: She fills a reaction vessel with H3PO4 and measures its concentration as the reaction proceeds: time…

A:

Q: Give the percent yield when 151.0 g of CO₂ are formed from the reaction of 2.000 moles of C7H16 with…

A:

Q: 7. At 25 °C, 0.0010 M NH4OH has a conductivity of 3.40 x 10-³ Sm¹¹. Given (in Sm²mol-¹): A, (NH4CI)…

A: In this we would use dissociation equation of NH4OH to calculate Kb.

Q: sample of gas at 1045.9 mmHg and 21.64 degree celsius has the pressure increase to 159.59 kPa. What…

A: Pressure is directly proportional to temperature

Q: QUESTION 14 Consider the reaction scheme below. Compound E PBr3 KMnO4/ H* + HCN Compound A Compound…

A:

Q: Data Table: Basic Laboratory Techniques (Dry Lab) A. Meter Sticks Point lo 120 Distance Distance…

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

Q: When a molten mixture of NaCl and ZnCl₂ is electrolyzed with enough dc voltage, the primary products…

A: The metal having more reduction potentiam will be liberated at cathode .

Q: e. The heat q for an irreversible change of state from state 1 to 2 might differ from the heat for…

A: To show that , given statements are true or False

Q: provide bond-line structure of the following cis-3-tert-Butylcyclohexanecarbaldehyde…

A: In organic chemistry, bond-line method is used to represent structures of compounds. In this…

Q: What is the pH of 1.2M ammonia? Kb = 1.8x10-5

A:

Q: Part A CH.(g) +45(g)-CS₂(g) + 2H₂S(g) If 35.8 g of CH₂ and 75.5 g of S react, how many grams of H₂S…

A:

Q: 2. Give the molecula formula for the following compounds and star the chiral center(s) in each one…

A: In the given compounds, * = Chiral center.

Q: For butenafine, develop a synthesis that starts with napthalene and benzene

A: The solution is shown below

Q: At what position, and on what ring, would you expect the following substance to undergo…

A:

Q: C. Determination of Cell Potentials Cell Notation (Galvanic) Zn | Zn²+ (0.10 M) || Cu²+ (0.10 M) |…

A: The measured potential is the same as the Ecell, expt. Ecell, theo can be calculated using standard…

Q: 3. How would you carry out the following reactions? (a) OH ii || I || CH3CCH₂CH₂COCH 3…

A:

Q: 4) Vocabulary: words are given circle the correct one. a. A Robinson Annulation can occur with…

A:

Q: K,CO3 (aq) + CaCl, (aq) → CaCO, (s) + 2 KCI (aq) 2

A: Using the balanced equation in the photos people calculate Net ionic equation for precipitate Then…

Q: Q1. Draw phase diagram of soil and what is formula of water content?

A: Phase diagram of soil.

Q: In the reactions given below, what rule is best describe them." 1) B₂H CH3-(CH₂)-CH=CH₂ 2) H₂O₂…

A:

Q: Draw the structure of the peptide WAKEP. Write the full name of each amino acid above the relevant…

A: Here we are required to find the net charge over the peptide WAKEP.

Q: 19) Which of the following species is the most nucleophillIC! A) H2O B) F- C) HS- D) NH3 E) CH3O-

A: Note:- A charged nucleophile is stronger than a neutral nucleophile. So we have to choose only…

Q: What are possible qualitative chemical tests that can be used in identifying aspirin in the product?…

A:

Q: For the following reaction, 20.5 grams of sulfur dioxide are allowed to react with 8.50 grams of…

A:

Q: 2. What charge, in coulombs, is required to deposit 1.5 g Cu(s) from a solution of Cu(aq)? (F-96480…

A: Known   Cu2+ (aq) + 2e- →Cu (s) Weight of Cu deposits = 1.5 g Atomic mass of Cu = 63.55 a.m.u.   F…

Q: A chemist is studying the following reaction that has an equilibrium constant of 6.5 x 10² 1/M…

A: Given: [NO] = 0.089 M [H2] = 0.035 M [N2] = 0.008 M [H2O] = 0.098 M Equilibrium constant = 6.5×102…

Q: The methoxy substituent on the benzene ring makes it less active than the unsubstituted benzene…

A: Given statement is  :  The methoxy substituent on the benzene ring makes it less active than the…

Q: E 4 inn 5 НО

A: IUPAC NAME OF THE FOLLOWING GIVEN ORGANIC COMPOUNDS ARE

Q: Coagulation is achieved by various mechanisms, which reduces the Zeta-potential and subsequently…

A: Introduction :-  Coagulation :-  The precipitation of collides by removal of charge associated with…

Q: What reactants would give the aldol condensation product shown? H ozl

A:

Q: a 3-methylpentare is FRE with a the ine characteristic smell that reacts with bromine leguied (a…

A: The initial reactants for the given reaction are- 3-methylpentane, Bromine liquid. The final…

Q: H- -CI H- -OH но но. ČH2OH ČH;OH CH,OH I II III A) I, II and III are diasteromers B) I and II are…

A: 18) enantiomers are the pair of compound that are non-superimposable mirror images to each other…

Q: C. Using the generic Michaelis-Menten plot below, describe the reaction's behavior in the following…

A: The explanation is given below-

Q: Generally, anion exchange resins are negatively charged. Is it true or fasle?

A: This statement is false.

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.