(Q88) A first-order reaction has a half-life of 16.9 seconds. How long (in seconds) will it take for the concentration of the reactant in the reaction to fall to one-eighth of its initial value? (3 sf)

Q: 3. In a material that can undergo a positional ordering phase transition, is an ordering transition ...

A: Positional ordering refers to the extent to which molecules shows transitional symmetry.

Q: which one of the following will show only one 'H-NMR signal? ans. Isobutane None Neopentane Pentane

A: NMR spectroscopy is a very important tool for the determination of the structure of the organic comp...

Q: Part III. Draw the structure of the following organic compounds. 1. 6-ethyl-2-octyne 2. 4-ethyl-2,3-...

A: Dear student, As you have asked the multiple part question but according to the guidelines we will a...

Q: Consider the following reaction where K, = 0.497 at 500 K. PCI5(g) PCI3(g) + Cl2(g) If the three gas...

A: The equilibrium reaction given is, => PCl5 (g) ↔ PCl3 (g) + Cl2 (g) Given: Kp = 0.497  And initia...

Q: 7. Calcium chloride, is added to a canned vegetables to maintain the vegetable's firmness. When adde...

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Q: write the electronic configuration of born whose atomic number is 5 and mass number 11.

A: Given,  born whose atomic number is 5 and mass number 11.  Atomic symbol = B 

Q: QUESTION 17 What is the geometry relative to the N atom in the Lewis structure below? H. 0: H-N- —ӧ—...

A: Geometry of the molecular is dependent only on number of sigma bond + lone pair

Q: Complete the following reaction scheme. A H H,0, H,O* HBr, H,02 Br, H,0 conc. H,SO, H;C- CH3 G H,, P...

A: Since you have posted question with multiple sub-parts, we are entitled to solve the first 3 only. T...

Q: O Heptene

A: In this question we have to choose correct option of compound is represented by above spectra with e...

Q: How many conjugated electrons does 2,3-dimethyl-1,3-buatdiene have?

A: Given, Compound : 2,3-dimethyl-1,3-butadiene number of conjugated electrons = ? Conjugated system: I...

Q: You need to make 7.04 L of 1.32 M KNO3. What molarity would the potassium nitrate solution need to b...

A: The law of dilution can help to prepare low concentration solutions by using stock solution. 

Q: a. Write the equation for the decay of ²5}Am by a- particle production. b. The complete decay of 241...

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Q: Which of the following statements is NOT true about Fermi Resonance? O t results from coupling of a ...

A: When fundamental vibration couple with overtones formed Fermi resonance . Due to this coupling the e...

Q: What is the molarity of a solution containing 15g sulphuric acid in 150 ml solution? What is the nor...

A: Mass of sulphuric acid = 15 g  Volume of solution = 150 ml  Molarity of the solution = ?  Normality ...

Q: caffeine contains 49.48 C,5.10%, H, and 28.85% N, (assume the rest is oxygen) What is caffeine's emp...

A: In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of ato...

Q: An organic chemistry student combines sodium amide and an alkyne. The major ion product of that reac...

A:   Sodium amide (NaNH2) combines with alkyne and forms NH3 and sodium alkylide. Example: Sodium amide...

Q: If a 1.065 g sample of magnesium oxide of 84.736% were treated with 50 ml of 1.017 N sulfuric acid, ...

A: A 1.065 g magnesium oxide sample of 84.736% purity is treated with 50 mL of 1.017 N sulfuric acid so...

Q: DRAW the line angle formula of CH3OH and HCN. Please follow the rules of drawing the line angle form...

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Q: Which compound is a common components of air pollution in the upper atmosphere to protect life on ea...

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Q: he initial concentration or

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Q: Problem 1 Claim: What functional group is attached to the acetic acid? Write your answer in one (1) ...

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Q: the given compounds. Write your answers on the space/field provided. Separate the reagents with a co...

A: The answer is as follows:  

Q: ~60°C trial ~50°C trial ~40°C trial ~30°C trial ~20°C trial Vol. of HCl used (mL) 19.87 12.93 12.37 ...

A: The solution of the question is given below: 

Q: Predict and identify the reactants of the following products. Draw the COMPLETE mechanism.

A: The functional groups of a molecule are the key constituents that provide notable chemical reactions...

Q: Solve the standard entalphies of the following and determine wether the reaction is endothermic or e...

A: 2NH3(g) + 3N2O(g) -----> 4N2(g) + 3H2O(l) CaCO3(s) -------> CaO(s) + CO2(g)  C(graphite) + O2(...

Q: Question 10 Which of the two directly affect the intensity of the IR signal? i. Whether the signal i...

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Q: How many conjugated electrons does methyl vinyl ketone have?

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Q: Chlorine dioxide, ClO2, is a reddish-yellow gas that is soluble in water, In basic solution it gives...

A:

Q: IUPAC NAME

A:

Q: What are solid substances?

A: Given,  solid substances

Q: Arrange the following in INCREASING strength of intermolecular force:(1) NH3 and HI; (2) H2 and CO2;...

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Q: 13:52 One mole of gas is allowed to expand from a voiume of 1L to 5L against the constant external p...

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Q: The relative atomic mass of antimony is 121,8. Antimony exists as two isotopes - antimony 121 and an...

A: Given, The relative atomic mass of antimony is 121.8 and it's two isotopes  antimony 121 and antimon...

Q: Calculate the standard enthalpy of formation of Cuo (s) from the given thermochemical equation: CuO(...

A:

Q: The reaction that occurs at anode in a dry cell ans. Oxidation of Carbon Oxidation of Mn02 Oxidation...

A: We have to tell which reaction occurs at anode in dry cell.

Q: j) k) 1) cyclohexyl methyl ketone to 2-cyclohexyl-1-bromoethane ethanol to 1-bromobutane (using only...

A: Given,  j) cyclohexyl methyl ketone to 2-cyclohexyl-1-bromoethane k) ethanol to 1-bromobutane (using...

Q: A 5.0 L balloon has a pressure of 1 atm at sea level, where the temperature is 28 ͦC. The balloon w...

A: Initial volume = 5.0 L  Initial pressure = 1 atm  Initial temperature = 28 °C  New temperature = 11 ...

Q: Are cyclohexene and benzene insoluble in water?

A: According to like dissolve like concept, non polar solvents dissolve in non polar solvents. Polarity...

Q: Draw the 2D and the 3D Lewis structure for each molecule. You do not need to show resonance structur...

A:  Lewis structure  -               It is simplify  representation  of valance shell electrons in mole...

Q: Part III. Draw the structure of the following organic compounds. 1. 6-ethyl-2-octyne 2. 4-ethyl-2,3-...

A: It is very important to assign correct position of the substituents mentioned while drawing structur...

Q: Naturally occurring Europium (Eu) consists of two isotopes with a mass of 151amu and 153amu. If the ...

A:

Q: Iodine-131 is used in the diagnosis and treatment of thy- roid disease and has a half-life of 8.1 da...

A: Given data: The half-life of iodine-131 = 8.1 days The initial amount of the sample= 10 μg

Q: What is the molality of a solution containing 75.5 g sucrose in 400 g water? Show your solution.

A:

Q: 1) Write the general rate law equation for the reaction Acetone (C,H,0(a) + Haa) + lodine (1z(aq)) C...

A: Since you have posted multiple questions, we are entitled to answer the first only. 1) The reaction ...

Q: A sealed reaction vessel initially contains 1.839×10-2 moles of water vapor and 1.301x10-2 moles of ...

A:  

Q: What happens to the rate of an Sy2 reaction when both [RX] and [:Nu ] are halved? The rate (select) ...

A: In the case of SN2 reaction,the rate depend on both the reactant and nucleophile  That is rate (R1)=...

Q: Which reagent(s) are best used to carry out the following reaction? OH a. H2CrO7 b. 1. propanol, NaO...

A: In the given reaction the aldehyde is converted into alcohol by the addition of an alkyl group to th...

Q: 14.46 Draw structural formulas for the products of the following hydrolysis reactions: OCH,CH, OCH,C...

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Q: Flame test is an example of whatb type of atomic spectroscopy? Emmsion Absorption Fluorescence Phosp...

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Q: A solution has [OH - ] = 4.0 * 10 - 8 . What is the value of [H + ] for the solution?

A: [OH-] = 4.0 × 10-8  [H+] = ?