22) A sample has a molar mass of 143 g/mol, identify the sample.A) ACCIB) AuCIC) AgCI23) 2.50 g of an unknown base is dissolved in 289 mL of water and has a concentration of 0.216 M. What is the

Molar mass of any molecule is given as the sum of the atomic masses od each of the constituent…

Answered: 22) A sample has a molar mass of 143…

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter16: Solutions

Section: Chapter Questions

Problem 101E

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3.85 The particulate drawing shown represents an aqueous so- lution of an acid HA, where A might represent an atom or group of atoms. Is HA a strong acid or a weak acid? Explain how you can tell from the picture.
\If the concentration of H+ ions in an aqueous solution decreases, what must happen to the concentration of OH ions? Why?
Equal amounts (moles) of HCl(aq) and NaCN(aq) are mixed. The resulting solution is (a) acidic (b) basic (c) neutral
Stock solutions of HCl with various molarities are frequentlyprepared. Complete Table 14.7 by calculatingthe volume of concentrated, or 12M, hydrochloric acidthat should be used to make 1.0 L of HCl solution witheach molarity listed.
Two liters of a 1.5 M solution of sodium hydroxide are needed for a laboratory experiment. A stock solution of 5.0 M NaOH is available. How is the desired solution prepared?
Vitamin C has the formula C6H8O6. Besides being an acid, it is a reducing agent. One method for determining the amount of vitamin C in a sample is to titrate it with a solution of bromine, Br2, an oxidizing agent. C6H8O6(aq) + Br2(aq) 2 HBr(aq) + C6H6O6(aq) A 1.00-g "chewable" vitamin C tablet requires 27.85 ml of 0.102 M Br2 for titration to the equivalence point. What is the mass of vitamin C in the tablet?
A scientist has synthesized a diprotic organic acid, H2A, with a molar mass of 124.0 g/mol. The acid must be neutralized (forming the potassium salt) for an important experiment. Calculate the volume of 0.221 M KOH that is needed to neutralize 24.93 g of the acid, forming K2A.
Calcium carbonate, CaCO3, can be obtained in a very pure state. Standard solutions of calcium ion are usually prepared by dissolving calcium carbonate in acid. What mass of CaCO3 should be taken to prepare 500. mL of 0.0200 M calcium ion solution?

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22) A sample has a molar mass of 143 g/mol, identify the sample. A) ACCI B) AuCI C) AGCI