Radioactive tungsten-178 decays with a half-life of 21.6 days. (a) What is the value of k in s-12 s-1 (b) A sample contains 29.0 mg 178w. How many decay events will be produced in the first second? Assume that the atomic mass of 178w is 178. decay events (c) A chemist obtains fresh sample of 178w and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 50.0% of the initial measured value. How long does she have to perform the experiment? days

Q: (G) (F) |(H) da. HSO, (C) HNO, (A) (1) FCI, (B) (D) (E) 1. KMOOR (J) 2. HCT

A: Ans -   A)  Substitution Reaction in five memered                         cyclic ring on benzene B)…

Q: PART II: PRECIPITATION BY INORGANIC ACIDS RESULT and OBSERVATION TUBE NO. 1. 3 mL of 5% egg…

A: Proteins contain polar hydrophilic groups (–NH2, COO–, – OH) as well as non-polar hydrophobic…

Q: 5. Fill in the blanks in the statements below about soil pH.  A soil with a pH of 4.9 is…

A: Answer: pH basically represents power of H+ ion concentration. Its value is equal to negative of…

Q: (d) NaCN

A: Information of question

Q: Give the polutants that are primarily responsibie for tropospheric czone increases and stratospheric…

A: The statement can be completed as:-  1. Tropospheric ozone comes primarily from NO , which is…

Q: CHEMICAL REACTIONS IN THE HOUSEHOLD SETTING CHEMICAL REACTANTS PRODUCTS EXCESS LIMITING REACTIONS…

A:

Q: other է HIO4 0 KMnO4 SHO + Na2Cr2O7 HO HO DMP P PCC OL

A: When the central compound, which appears to be an alcohol based on the OH groups, reacts with the…

Q: Methane + H2SO4 (change) --- >

A: 4 H2SO4 + CH4 → 6 H2O + CO2 + 4 SO2

Q: *** What amount (in mol) and what mass (in kg) of carbon dioxide are produced when 20 gallons…

A:

Q: OH 1.SOCI2, Pyriding 2. AMgBr 6. HO. 3. H20 1. 2. H20

A: Organometallic complexes are useful organic synthetic reagents. Grignard reagent RMgX on reaction…

Q: 1.) Methane (CH,) is a greenhouse gas, with the potential to raise global temperatures 20 times…

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

Q: 19. The chemical equation for photosynthesis is _CO2 (g) + H₂O (1)→____C6H1206 (s) +_ (C6H12O6 is…

A: The given chemical equation for photosynthesis is CO2(g)+H2O(l)→C6H12O6(s)+O2(g). Amount of CO2…

Q: Compare the-chemical reactivity of calcium and magnesium. Explain the red litmus paper result. Can…

A:

Q: 2NaHCO3(s) = N22CO3(s) + H2O(g) + CO2(g) * Right Left No Change co2 is removed Na2CO3 is removed…

A: According to Le Chateliar's principle, adding a reactant shifts the equilibrium to the product side.…

Q: What does the positive KMnO4 Test indicates? support your answer

A:

Q: Imagine that you have 4 buckets full of dark, muddy water. One bucket is frozen, one bucket is…

A: The bucket which is most likely to become lighter in color is

Q: For the reaction 2N2O5(g) ® 4NO2(g) + O2(g), the following data were collected.   t (minutes)…

A: First, we will find the initial rate of consumption of N2O5(g) by using the concentrations of…

Q: 4. Photochemical smog is a type of air pollution in the troposphere of our planet produced when…

A:

Q: Strong group cohesiveness can be a leadership O A. Substitute B. Neutralizer OC. Bolth A and B above…

A: 31). Answer is " Substitute " Reason: Substitutes are characteristics that take away from the…

Q: 2. Make a list of some facts in this article that relate to what we have studied so far. What We…

A: 1  As bectrium are able to substitute phosphorus with arsenic it indicates that chemistry of arsenic…

Q: Chlor-alkali plants electrolyze NaCl to produce the commodity chemicals caustic soda and chlorine…

A: The maximum concentration of mercury in the effluent is = 2.50×10-9 mol/L The mass of the mercury…

Q: Paragraph 5: Discuss Fractional Bistillation of petroleum oil to give the chemical feedstock to make…

A: Fractional Distillation is a process/technique which is used for separation of a mixture into its…

Q: Suppose a group of students put 2.92 grams of an unknown solid acid into a 250-mL volumetric flask…

A:

Q: Br Br > WHat kind oF (caalon is this? E2IE|SNI|SN2 1, MgBr 2. H20 Ho heat CH3 CH21 AIC13

A: Note : carbonyl compounds undergo nucleophilic addition reactions. 1,5-hexadiene undergo cope…

Q: If you started with 7.25 bsh, how many bgt is equal to this?

A:

Q: Here we have the molecular orbital energy diagram for this chlorophyll molecule. Match the…

A: To match the absorption peaks with the transitions shown in molecular orbital energy diagram.

Q: 1. LIAIH4, Et₂O 2. H₂O

A: LiAlH4 reduces ester into alcohol.

Q: CrO3 b)

A: CrO3 is an oxidising agent.

Q: 2al(s) + cr2o3(aq) > al2o3(aq) + 2cr2(s)

A: The given chemical reaction, 2Al(s) + Cr2O3(aq) -------> Al2O3(aq) + 2Cr(s)

Q: C7H16(g) + O2(g) →   C2H2(g) + O2(g) →   C3H8O(g) + O2(g) →

A: Note : As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost…

Q: Briefly state what separates science from opinion?

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

Q: Starting from the following alkene, which products will be obtained upon the action by the following…

A: Answer:- This is answered by using the simple concept of chemical reactions of organic compounds…

Q: Complete a seperation scheme for biphenyl, sand, and salicylic acid

A: A mixture of biphenyl, sand and salicylic acid is to be separated.

Q: What is Environmental chemistry? What is Stoichiometry? What are the types of chemical reactions?…

A:

Q: So are there 2 products or 4?

A: To determine whether the products formed are 2 or 4.

Q: How can washing plastic in warm water before recycling actually put more carbon in the atmosphere? C…

A: Plastics are polymers, which do not vaporize or evaporate on heating instead they melt and are…

Q: 2- Make a comparison between brittle and ductile materials Brittle Materials Ductile materials

A:

Q: ____________ makes up the majority of oil use, with gasoline and diesel fuel being the most common…

A: Petroleum is a naturally occurring substance which is composed mainly of aliphatic hydrocarbons.…

Q: N2+ H2--> NH3

A: Nitrogen gas reacts with hydrogen to produce ammonia.  According to the Law of conservation of mass…

Q: Of 1) LIAIH4 2) H20 3) TSCI, pyridine b. 1) HBr 2) NaOCH3 3) O3 4) (CH3)2S с.

A:

Q: Why is carbon chemistry clearly complex?

A: The atomic number of C-atom is 6. Its configuration of C-atom is K(2) l(4). It has 4 e-s in the last…

Q: NB Assume the densities of all solutions are 1.0 g/ml and their specific heat capacities 4.184 1/g.…

A: We are given thermochemical data for the neutralization reaction between HCl(aq) and NH4OH(aq) and…

Q: 1) HNO3, H2SO4

A: HNO3 + H2SO4 is nitration mixture benzene gives nitrobenzene with nitration mixture, it is…

Q: The liquid form of fossil fuels is natural gas O coal O gasoline O oil/petroleum materials in the…

A: Answer: The liquid form of fossil fuel is  oil/petroleum.

Q: HO 1. TsCl, py В 2. LIET3BH, THF "CH3

A:

Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.