The half-life for the decay of radium is 1620 years. What is the rate constant for this first-order process?

Q: A certain lonic compound. X has a solubility in water of 0.121 at 20. C. Calculate the mass of X…

A: Use the volume and the solubility of a compound to calculate the mass of X required.

Q: Which type of electromagnetic radiation has the shortest wavelength? O X rays Radio waves O Ultra…

A: X rays has the shortest wavelength means they have higher frequency. The order of increasing…

Q: 4.61) Classity each of the following structures as either an alcohol, carboxylic acid, or ester. :0:…

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Q: Rate constants for decomposition of dinitrogen pentoxide are 3.7 x105 s¹ at 25.0 °C and 3.4 x10³ s¹…

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Q: KOH + HBr → KBr + H2O A student sets up a titration apparatus with 25 mL of potassium hydroxide in…

A: To determine the concentration of potassium hydroxide in the reaction, the student can use a…

Q: You need to make an aqueous solution of 0.215 M magnesium bromide for an experiment in lab, using a…

A: The molar mass of magnesium bromide is the sum of the atomic masses of magnesium and bromine,…

Q: At -191 °C, Keq 134 for the reaction: (a) What is the value of Kea for the reaction NOBr(g) NO(g) +…

A: The equilibrium reaction given is NO (g) + 1/2 Br2 (g) ⇌ NOBr (g) Keq = 134

Q: Macmillan Learning How many grams are in 0.0964 mol of lithium? mass: How many grams are in 0.250…

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Q: Ammonium perchlorate (NH4CIO4) is the solid rocket fuel that was used by the U.S. Space Shuttle and…

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Q: Below is the tabulated molecular weight data for a polytetrafluoroethylene [-(C₂F4)-]n material.…

A: The degree of polymerization is 498   To get the number average molecular weight you divide the…

Q: General Chemistry 4th Edition McQuarrie Rock Gallogly Balance the equation by inserting coefficients…

A: We have been asked to write the balanced chemical equation by inserting the coefficients. Reactants…

Q: a) Show that the Octahedral holes in a closed-packed arrengement can accommodate spheres radius…

A: The Octahedral holes in a closed-packed arrengement can accommodate spheres radius ratio of 0.414.

Q: during aspirin synthesis\ why do we add phosphoric acid, and heat reaction mixture reason for…

A: In aspirin synthesis, phosphoric acid is used as a catalyst to accelerate the reaction between…

Q: 5) Identify the number of r-electrons in each chemical species below. Label the ones that are…

A: Highly stable and highly conjugated cyclic compounds that do not give addition reactions and follow…

Q: Organic chemistry question I. Write an equation for the proton transfer reaction that occurs when…

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Q: Why does this equation for the electron ratio have two radii (R and r)?

A: In the electron ratio equation, the two radii (R and r) refer to different aspects of the system…

Q: How many moles of aspirin (C9H4O2, 180 g/mol) are present in a low-dose tablet that contains 15 mg…

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Q: Draw the mechanism of this reaction

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Q: In the six runs indicated below 1.2 x 10 violet is used. RUN 1 2 3 4 BEAKER 1 M stock solution of…

A: we have proved that option A, D ,E ,C are false that means the correct option is option B.

Q: The equilibrium constant for the following reaction is 0.0472 NO(g) + SO3(g) SO₂(g) + NO₂(g) Each…

A: We have been given an initial pressure of 0.862 and equilibrium constant of 0.0472.  I represent…

Q: Show that the Octahedral holes in a closed-packed arrengement can accommodate spheres radius ratio…

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Q: What amount of heat (in kJ) is required to convert 11.0 g of an unknown liquid (MM = 67.44 g/mol) at…

A: A 11.0 g of an unknown liquid MM = 67.44 gmol is heated from 43.5 °C to a gas at 128.2 °C. Normal…

Q: Calculate the pH when 90.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH3NH₂ (Kb = 4.4 x…

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Q: How many hydrogen atoms are in a 12.2 g sample of ammonia (NH3)?

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Q: As solution was prepared by dissolving 5.76g of KCl.MgCl2.6H2O (277.85g/mol) in sufficient water to…

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Q: 1. How many ¹H NMR absorptions are expected for each compound? In other words, how many…

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Q: At a particular temperature, Kp = 0.230 for the reaction   N2O4(g) = 2NO2(g)   1a) A flask…

A: Given : Kp for the reaction is 0.230. Initial partial pressure of N2O4(g) is 3.40 atm.

Q: Write the equilibrium-constant expression for the reaction shown in terms of (A). [B]. [C], and [D].…

A: Answer :  Given that, the reaction is :  A(g) + B(g)↔2C(g) + D(g)

Q: A particular solid has a structure in which W atoms are located at the cube cornors, S atoms at each…

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Q: 4.18) Is O₂ a polar or nonpolar molecule? 0=0 nonpolar

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Q: 6. What are the products of the below diels-alder reactions? Include stereochemistry! a) b) Br Br

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Q: how do you calculate the mass of evaporating dish after removing iron fillings? And the mass of Fe?

A: By simply subtracting the appropriate masses , one can find the mass percent of Fe.

Q: 6.62 From the following data, C(graphite) + O₂(g) → CO₂(g) AH-393.5 kJ/mol H₂(g) + O₂(g) → H₂O(1) AH…

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Q: i) Redraw serine, using wedged bonds, to show its two enantiomers: HOOC NH₂ CH₂OH Serine H Assign…

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Q: Which statement is correct concerning the relative stabilities of the two conformations, A and B,…

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Q: Macmill How many grams are in 0.250 mol of cadmium? mass: 28.1 How many grams are in 0.690 mol of…

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Q: A sample of gallium contains two isotopes and its atomic weight is 69.72 amu. If the sample is…

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Q: 6.53 Calculate the heats of combustion for the following reactions from the standard enthalpies of…

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Q: In three to five sentences, predict the bonding activity between phosphorous and chlorine. Why do…

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Q: Caffeine has the empirical formula C4H5N2O and an approximate molecular weight of 97.1 g/mol. What…

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Q: explain in you own words what happens to a beam of light when  passes through a colored solution…

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Q: Calculate the PH, pOH, and percent ionization: 0.30M phenol, C6H5OH, pKa=9.88

A: Answer :

Q: Consider this balanced chemical equation: C3H8 + 5 O2 → 3 CO2 + 4H₂O Write the four different…

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Q: a) Put these three common types of carbonyl compound in order of decreasing reactivity         ester…

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Q: F. Propose the structure of the major Product and a Full Mechanism for its formation. OH X POCI3…

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Q: b) i) The Parkinson's disease drug Levodopa is shown. Which one-letter stereodescriptor (S or R)…

A: According to Cahn-Ingold-Prelog rule-   1) More atomic number having more priority. 2) If first atom…

Q: The density of heptane is 0.68g/mL. Calculate the mass of 15.00mL of heptane

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Q: Answer and show your solution: Given that 22.3 moles of Ar occupy 4.52 L at 12°C, calculate the…

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Q: Compounds and Moles H₂O O 50₂ O Ra(CO) O SFG O CF₂ O Xefa H₂0 H O Molar Mass 18.015 64.058 241.12…

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Q: A chemist is studying the following equilibirum, which has the given equilibrium constant at a…

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