How much of a certain chemical was present at t = 0 if it disintegrated at the following rate: @t = 2 days, m = 10 g and @t = 5 days, m = 5 g? Assume exponential decay. Select the correct response: 15.33 g 16.91 g 15.87 g 16.21 g none of these 16.34 g

Q: Why do most studies of chemical reactions use the initial rates of reaction to generate a rate law?…

A: In chemical reaction engineering, the chemical reaction a process that involves rearrangement of the…

Q: Radioactive decay is a process that follows a first-order rate law: Rate = kN, where N is the…

A:

Q: Plot the Gaussian distribution function for the end-to-end distance for M =135,000 g/mol poly(1,4-…

A:

Q: Home Work: Convert TBP alve method Voliz Terp (°C) To = T10-AT1 T70=T50 + AT5 T90 = T70+ AT6 T90 =…

A: ASTM distillation curve is to be converted not TBP curve.

Q: We will use this equation in a slightly different way, since it is difficult to define the volume V…

A: Given :

Q: Practice Exercise 3.7 1. Plutonium – 236 is an alpha emitter with a half-life of 2.86 years. If a…

A: radioactive material decay with with first orderm=m0e-kthere m is remaining mass after time tm0is…

Q: 25. What is the entering concentration of nitric acid? a) 0.145 mole/dm3    b) 0.326 mole/dm3   c)…

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

Q: What are 10 household products that involve heavy metals, harmful solvents, volatile organic…

A: Heavy metals are one of the most dangerous groups of biologically important pollutants. On top of…

Q: A groundwater source is contaminated by Chemical X at a concentration of 31 µg/L. You are hired as…

A: Initial concentration of chemical X in groundwater = 31Final required concentration of chemical X =…

Q: 2. Exponential drop of activity (i) Define activity and state its units. (ii) Explain the following…

A: Dear Subscriber! As per our authoring guidelines, we can author the first of the multiple and…

Q: In an experiment to find the empirical formula of Zinc lodine my data is as follows Mass of Zinc…

A: The molecular formula for Zinc Oxide is ZnI2. The molar mass of Zn is 65.38 g/mol and the molar mass…

Q: Which one of the following is NOT a greenhouse gas? А) CFCS B H20 C 02 D Co2

A: Given that : CFCs ,H2O ,O2 and CO2   are given we have to solve identiy which is not a greenhouse…

Q: Fifteen molecules are distributed as 9:4:2 between equal-sized boxes A:B:C, respectively. The…

A: Given that, Number of molecules = 15 Number of molecules in box A = 99+4+2 × 15 = 9 molecules Number…

Q: I need help with this.  I'm confident that n(1) is 995 mol C3H8.  But I'm having trouble to…

A: Step 1 Step 2 Step 3 : Step 4

Q: 5. How many calories are needed to heat 50 g of ice at -17 deg C to steam at 115 deg C? C (ice) =…

A: Given,   50 g of ice. C (ice) = 0.5 cal/ g°C = 2.06 J/g.K Csteam = 0.48 cal/g°C = 2.02 J/gK

Q: 4. Calculate AG at room temperature (298 K) if Ksp = 0.00091 at room temperature. Does this AG value…

A: The equilibrium constant, K = 0.00091 The room temperature, T = 298 K

Q: Q2/ Find F1, F2, and F3 for the system shown below? F3=? 100% Benzene F1=? F2=? 60% Xylene 40%…

A: Benzene is a clolurless or light yellow liquid at room temperature. It has a cyclic structure ,…

Q: exothermic Is this reaction exothermic, endothermic, or neither? O endothermic neither If you said…

A:

Q: The data should fit a linear model of the form log k EA/(2.303RT), where A is the preexponential log…

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

Q: 3.) At room temperature the electrical conductivity of PbTe is 500 (N-m)1 whereas the electron and…

A: Given: σi = 500 (Ω-m)-1 μn = 0.16 m2/V-s μp = 0.075 m2/V-s ni = ? We know that, σi = ni q [ μn + μp…

Q: 14.18. What is the half-life of a radioisotope if it decays to 12.5% of its radioactivity in 12…

A: Radioactivity decay happens in isotopes due to alpha, beta or gamma decay. However, gamma decay…

Q: J is the nucleation rate, solve this; 1.0086 = exp (-J (0.2) )

A: Given, the expression for nucleation rate is 1.0086 = exp-J0.2

Q: 25. What is the entering concentration of nitric acid? a) 0.145 mole/dm3    b) 0.326 mole/dm3   c)…

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

Q: 1. Plutonium – 236 is an alpha emitter with a half-life of 2.86 years. If a sample initially…

A:

Q: If our feed is 0.60 mole fraction, what is the highest vapor mole fraction that we can produce? 1 ..…

A:

Q: 1 I 5 EF 6. Table 1: Temperature and Volume Data Temperature Conditions Temperature (°C) Temperature…

A:

Q: The dry analysis of combustion of C4H10 per 100 kmol of DRY Products:y =5.5 kmol, e=86.6 kmol,…

A: a(C4H10) + b(02+3.76 N₂)  -------------->  x(CO2) + y(CO) + e(N2) + d(H₂O) y =5.5 k.mol e=86.6…

Q: Given for 3-5: If the pH of lake water falls below 5.0, it is considered as "dead". Taal lake has a…

A: Given the concentration of [OH] = 1.0×10-4 we have to find the pH of Taal lake, the concentration of…

Q: The half life of Bi–210 is 5 days. In what period of time would the activity of a given sample of…

A:

Q: Turny You have the following decay chain IA N= In@) It'e 1odays B. B. 50 hours stoble 8x 103° atoms…

A:

Q: Since the half-life of 235U (7.13×108 years) is less than that of 238U (4.51×109 years), the…

A:

Q: The decay of U-238 to Pb-206 can be used to estimate the age of inorganic matter. The half-life of…

A: The decay of the U - 238  to Pb - 206 is used to estimate the age of the inorganic matter .The half…

Q: Multiply both sides of the equation by the same expression: (Be sure that the answer field changes…

A:

Q: A radioactive element decays at such a rate that after 15 minutes, only 1/10 of the original amount…

A: Given that for t = 15 min NA  =  110NAoFor time t NA  =  1100NAo

Q: (d) Point A in the diagram corresponds to a two-layered mixture containing 30 g phenol and 100 g of…

A: d) Given that, The concentration of Phenol at point A = 30 g of phenol/100 g of water Total weight…

Q: Hi! How did you find the saturation Pressure, I used Antoine's equation but got different values for…

A: A binary mixture of benzene and toluene is to be separated into distillate and bottom product with…

Q: I 11 The combustion of a polymer gives only carbon dioxide and water. Its average molar mass is…

A: This question is from Polymer sciences. Data given: Average Molar mass = 105000 g/ mole Degree of…

Q: The following  potentiometric cell can be used to measure Ksp of AgI . SCE//Ag|Ag+(sat’d…

A: GIVEN:  Concentration of [Ag+] =  0.10 M             -----(1)  By using the Nernst equation, we get…

Q: In Octal Petrochemical company find the first order rate constant for the disappearance of A in the…

A: Initial Volume% of A=80% Final Volume% of A=20% Time taken=3minutes To find: The reaction rate…

Q: 6. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2.00 yr. (a) what is the…

A: Here, the initial concentration of [Sr-90] is [A0] =1.000g. The final concentration required [A]=…