Sr is an inotope produced from atmosphenic testing of nuclear bombs. If naclear testing was stopped in 1960, what percentage of radioactivity due to se remained in 2000? The half-life of Stis 28.5 years

Q: PHYSICAL METHODS OF WATER TREATMENT (CLEANING) 1. filtration 2. coagulation 3. desalination 4.…

A: Physical method for water treatment is-  1-Filtration Other given process are always make use of…

Q: the separatory funnel. Repeat this until the aqueous layer is twice the volume of the organic layer.…

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Q: s) Name the following compounds properly. a) H3C. NH 0-CH3 b) H3C CH3 elah H3C-

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Q: 1.) A titration reached the equivalence point when 16.1 mL of 0.209 M H2SO4 (aq) was added to 12.0…

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Q: For 6 and 7, use the table of K, values compiled at 25 °C to answer the questions below: cid HNO,…

A: Acid can be defined as the species that donate hydrogen ions in aqueous solution and base is a…

Q: The reaction of CaCO3(s) to produce CaO(s) and CO2(g) has an equilibrium constant at 25°C of 2 x…

A: Given reaction is :  CaCO3 (s) <-------------> CaO (s) + CO2 (g) , at 25 0C, k = 2 x 10-23…

Q: The total concentration of ions in a 0.250 M solution of HCl is

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Q: 1. A reversible reaction has reached a state of dynamic chemical equilibrlum. What does this…

A: Equilibrium constant can be defined as the ratio of the concentration of products to reactants at…

Q: 22. Cyclopropane isomerizes exothermically to propene as shown. H. C. H. AH° = -32 kJ mol-1 H-C C-H…

A: We can calculate carbon carbon single bond dissociation energy as follows

Q: The [H3O+] in a solution with pOH of 0.253 is ____.

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Q: Rank the acidity from most to least for given solutions. I. a solution with [H3O+] = 4.2 × 10−6 M…

A: More the H+ ion more will be the acidic nature. Lower the pH of solution greater will be the…

Q: 1.Determine the number of lone pairs (if any) on each oxygen, nitrogen, and charged carbon atoms in…

A: To find the lone pair on oxygen and nitrogen atom we will use the following formula. FC= V – (N + B)…

Q: A 0.1500-M solution Ba(OH)2 was used to titrate a cleaning solution containing acetic acid. A…

A: Answer: Given data: Vsample=50mL VBa(OH)2=43.40mL CBa(OH)2=0.15M

Q: For a chemical reaction that is spontaneous at standard conditions, which of the following holds?…

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Q: Increase. Instead, the volume of the gas increases in proportion to the increase in Kelvin…

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Q: What is the percentage purity of a sample of impure oxalic acid dihydrate if a sample weighing…

A: Given the mass of impure sample of oxalic acid dihydrate, H2C2O4.2H2O = 0.2003 g  Volume of…

Q: Hydrogen peroxide decomposes by the following reaction.  The reaction is rapid with the addition of…

A: Entropy is degree of randomness or disorderness.  If the number of Gaseous moles increases then…

Q: write the mechanism of reaction

A: In this question, we will write the mechanism of the reaction, when the two reactants are alkene…

Q: Which of the following is expected to show aromaticity? CH CH HC CH NH O none of the above is…

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Q: The following plot shows a titration curve for the titration of 1.00L of 1.00M diprotic acid H2A

A: Since H2A is a diprotic acid and it can gave two H+ ions in the solution therefore it has two…

Q: NH fe step 8 lease wite step by mechanism.

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Q: Based on the theoretical result, what is the order of reactivity of primary, secondary, and tertiary…

A: Lucas reagent is used for test of alcohol. Tertiary alcohol reacts faster with Lucas reagent because…

Q: If polonium-210 emits an alpha particle, the other product will be     a. lead-206.   b.…

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Q: Fe2O3 -> Fe + O

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Q: What to do: Read each statement below and identify if it defines electrode potential, reduction…

A: A question based on electrochemistry that is to be accomplished.

Q: Below is a primary alcohol or and an aldehyde (of same carbon length). Which is more likely to be…

A: The solubility in water depends on the intermolecular interaction among the water molecules with…

Q: Given the partial pressure of H2 (g) PH2 = 0.0500 atm, [Cd2]= 0.150 M and the pH of the cell is…

A: Given redox reaction is Cd(s)  + 2H+(aq)   →H2(g) + Cd2+(aq); E0 = 0.400 V pH of the cell = 2.34…

Q: Which of the following would you expect to have the higher boiling point? Explain why. OH 3.

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Q: . Lead(II) iodide has a solubility product constant of 1.4 × 10-8. What is the concentration of I¯…

A: Given that: Solubility product constant of lead iodide(Ksp) = 1.4×10-8 It is sparingly soluble salt.…

Q: Consider these reactions: Reaction 1: H2 (9) + Cl2 (g) → 2HC1(g) AH = -184.6 kJ Reaction 2: 20F2(g)…

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Q: 1, a) Identify the intermolecular forces present in 1) Ne il) CO ii CH3CI iv) CHOHV Naci vi NH vi)…

A: Here we have to predict intermolecular forces present in the following compounds.

Q: How does carminic acid a (organic compound) allow them to function as a pigments in 2-3 sentences.

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Q: Which ion has the stronger ion-dipole forc

A: Which ion has the stronger ion-dipole force?

Q: Consider the transition metal M which, in neutral form, has an electronic configuration ending in…

A: Oxidation state is defined as charge on central transition metal ion.

Q: Identify the abminant mechamien, provide a lond line frawing of the major organic product, ond a…

A: A question based on introduction to organic chemistry that is to be accomplished.

Q: Define: Anisotropy, Heisenberg's uncertainty principle.

A: Anisotropic property is the property of crystal. Heisenberg uncertanity principle shows the…

Q: 3. Circle all the electrophilic sites on the following molecule, H. HN N. H HO он

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Q: Find The energy level, degenercy and first excited state of two identical particles moving in a…

A: Two find the energy of first excite in a harmonic oscillator 1- for two bosons 2- for two fermions

Q: what is the hybridization of the Xe atom in XeF4   (with an explanation using the bumber of rlectron…

A: Hybridization can be calculated using number of electrons domain that is bond pair and lone pair .…

Q: Three elements, A, Q, and Z, have the molar masses indicated in the table below. Given a compound…

A: empirical formula has to be determined using the given data

Q: Some quantity of NOBr is added to an otherwise empty flask. The reaction: 2 NOBr (g) ⇄ 2 NO (g) +…

A: Here we are required to find the equilibrium pressure NO.

Q: Kristen dissolves 28.01 grams of NaOH in enough water to make 236 mL of solution. What is the…

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Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O:…

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Q: Calculate ∆U, w, q (in kJ) and ∆S (in J/K) when one mole of an ideal monatomic gas at 25°C is…

A: Given :  Temperature = 25 °C  Initial volume = 10 L  Final volume = 40 L  Number of moles = 1 mole

Q: Rachel burns a 53 gram cracker under a soda can filled with 87.3 grams of water. She took the…

A: Rachel burns a 53 gram cracker under a soda can filled with 87.3 grams of water. She took the…

Q: What reagents are used in the esterification of Alcohols and Phenols?              a.Write the…

A: Esterification can be achieved by reacting alcohol with acid or acid chloride in presence of…

Q: 5. A solution is prepared by adding 1.00 x 1013 mole of strong base NaOH to 1.00 L of aqueous…

A: In this question we have to tell the pH of the given solution.

Q: 7. For the following species dissolved in water, at 298 K: (1) Na* ion (D in H:0 = 1.33 x 10° m²…

A: Diffusion of solute in water

Q: Predict the major product(s) of the following reaction (CH7). MeOH Br OMe OMe OMe OMe II II IV O II…

A:

Q: A 1.0-g fat was titrated against a 0.500-M KOH and consumed 13.0-mL of the titrant. A blank analysis…

A:

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.