The half-life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams would have been present 9612 years ago?

Q: Explain the difference between: a strong acid or base and a weak acid or base

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Q: A radioactive isotope of potassium-38 is a positron emitter. What is the name of the daughter…

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Q: c. Using AH from (a) how many moles of water could be heated from 20.0° C to 35.0° C by the burning…

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Q: How many significant figures are in 9630.0010? (numerical answers only) N

A: Given,  How many significant figures are in 9630.0010 ?

Q: The acidity of the alcohol is increased by efficient stabilization of the alkoxide ion through…

A: The acidity of the alcohol is increased by efficient stabilization of the alkoxide ion through…

Q: One dietary supplement capsule weighing 4.90 was ground into a fine powder. Two portions of the…

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Q: Express the following measurement to 5 significant figures: 872311 mm. (Type numerical values only;…

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Q: Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of…

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Q: 24-hr urine specimen was diluted to 2.000 L. After the solution was buffered to pH 10, a 10.00-mL…

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Q: Among the following oxoacids, the correct decreasing order of acid strength is: HOCI>HCI02> HC103 >…

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Q: A sample of gas occupies 24.0m^3 at IOO K. Determine its volume at 400.0K

A: At 100 K a gas sample occupies 24.0 m3 volume.We have to calculate the volume of gas at 400.0 K .

Q: he chemist (first and last name) that the catalyst PCY3 1.CI Ru CI Ph PCY3

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Q: What is the pH of the solution of 35.0 mL 0.20-M formic acid and 55.0 mL 0.10 M sodium formate in…

A: given data formic acid 35.0ml or 0.20 M sodium formate 55.0ml or 0.10M water 110ml find PH

Q: - Draw the correct monomeric structure for poly(methyl-a-cyanoacrylate) using the ook's method of…

A: The answer is given below

Q: Calculate electronegativity values for the H and Br atoms in HBr using Pauling's, Allred- Rochow's,…

A: Electronegativity Electronegativity  (χ), is the capability for an atom of a given atom to attract…

Q: The shaded area in the following diagram shows CH₂ CH₂ ? H N-HO -CH₂ C-OH-N Gly 193 H RN O Covalent…

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Q: The titration of 50.0 mL of 0.100 M acetic acid (Ka = 1.75 x10^-5) with 0.200 M sodium hydroxide at…

A: We need to calculate pH for the given titration

Q: 3. Compound Y has a molar mass of 85.0 g/mol. The combustion of 510.0 g of compound Y causes the…

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Q: What is the IUPAC name of each of the the following? CH3CH₂CHÖNH2₂ CH₂CH3 CHISCH CHENNICH, CH₂-…

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Q: Identify the major product for the following reaction

A: given  identify major products

Q: An atom has a mass of 52 amu and 24 electrons. How many neutrons are in this atom?

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Q: Fill in the blanks: H₂C. CH₂ H₂C. CH3 Br2 H₂C CH₂ FeBr3 H₂C CH₂ After the bromination reaction, the…

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Q: A 0.7500-g sample of impure iron ore was treated and passed through a Jones reductor. The Fe (II)…

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Q: How did you get pKa? where did 1.8 * 10^-5 come from?

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Q: Choices: L-оли НО OH XxX V-сяч nka 1 UL-сяч nka-11 nka

A: Here we have to match the correct order of pKa of the following compounds.

Q: With the help of a suitable enthalpy cycle explain what happens when an ionic compound such as NaCl…

A: The answer is given

Q: 4- Choose the correct reactants required to synthesize the following molecule. H3CO OCH3 A. Acetone…

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Q: In the dreaded Zephyer galaxy there is a race of Fairies that have the ability to change their body…

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Q: In the contact process:                                                                       DH =…

A: Given data In the contact process:                                                      DH = -197…

Q: 10. In what ways can a refractive index be used to characterize a liquid sample? 11. Describe how to…

A: A question based on properties of liquids that is to be accomplished.

Q: Write the nuclear equation for the beta decay of fluorine-19.

A: we have to write nuclear equation for the beta decay of F-19

Q: Calculate the pH of 0.1mol dm-3 potassium hydroxide (KOH(aq))

A: we need to calculate pH of the KOH solution

Q: According to the following reaction, how many grams of water will be formed upon the complete…

A: Given, Hydrogen peroxide (H2O2) ➝ water (l) + Oxygen (g) mass of hydrogen peroxide react = 23.3 g…

Q: duce this regiochemistry in elimination reaction. Br

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Q: Copper has a density of 8.96 g/cc. If a cylinder of copper weighing 42.388 g is dropped into a…

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Q: 1. A 250.0-mL seawater sample was titrated against 0.1250 M silver nitrate to test its chloride ion…

A: First write down the reaction of chloride ion in seawater with AgNO3 and find out its molarity.

Q: Neither of the methods of making pentan-1,4-diol will work. Explain why not-what will happen…

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Q: An aqueous solution of barium hydroxide is standardized by titration with a 0.122 M solution of…

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Q: Write a 1-page written plan on how you would specifically address the effects water bottles have on…

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Q: Balance the following chemical equation: 1. Ca3(PO4)3 + H2SO4 → CaSO4 + Ca(H2PO4)2

A: • The given unbalanced chemical equation is,   Ca3(PO4)2 + H2SO4 →…

Q: A sample of an industrial waste water is analyzed and found to contain 27.0 ppb Cr³+. How many grams…

A: Given that -  ppb Concentration of Cr3+ in industrial waste water = 27.0 ppb  Total mass of waste…

Q: 1. CL was tasked to identify the white solid inorganic salt that Dr. Yang gave her. From her…

A: We have two different salts, Zn(CN)2(s) and AgSCN(s) to compare and find the unknown salt out of…

Q: What mass of precipitate (in g) is formed when 250.0 mL of 0.200 M CoCl₂ is mixed with excess KOH in…

A: Given,  CoCl₂(aq) + 2 KOH(aq) → Co(OH)₂(s) + 2 KCl(aq) The mass of precipitate (in g) formed when…

Q: A chemist fills a reaction vessel with 6.56 atm methanol (CH3OH) gas, 5.57 atm oxygen (O₂) gas, 3.98…

A: Given :  Pressure of methanol = 6.56 atm  Pressure of oxygen gas = 5.57 atm  Pressure of carbon…

Q: Of the following, which acid has the weakest conjugate base? О HC104 О нсоон О H3PO4 H2CO3

A: we know stronger acid will have the corresponding weaker conjugate base. Here HCOOH,H2CO3 and H3PO4…

Q: Question 1 Which is smallest? O 25 g O 250 mg O 0.0025 kg O 2500 mcg

A: Given, Which is smallest ? 25 g 250 mg 0.0025 kg 2500 mcg Note:  1 kg = 103 g = 106 mg = 109 mcg

Q: Based on the reaction, Sn + Cu²+ → Sn²+ + Cu* (in acidic medium) 2+ 2+ Calculate the following…

A: Given cell reaction is :  Sn + Cu+2 -----> Sn+2 + Cu+  At anode oxidation takes place while at…

Q: 10.5. The rate of formation of the product of a reaction is found to give a nonlinear Arrhenius…

A: The overall reaction we have is A+B→C+D It has been mentioned that the overall reaction is…

Q: mixture of 0.750 mol H quilibrium constant Ke fe Calculate the concentra . Suppose that the initiall…

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Q: The illustration to the left represents a mixture of hydrogen (light blue ) and oxygen (red)…

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