Tooth enamel is the hardest substance in the body and is mainly the mineral  hydroxyapatite, Ca10(PO4)6(OH)2. If 1.125 g of tooth enamel reacts with hydrochloric acid to give 0.975 g of CaCl2, what is the percentage of hydroxyapatite in tooth enamel?      Ca10(PO4)6(OH)2(s)  +  20 HCl(aq) → 10 CaCl2(aq)  +  6 H3PO4(aq)  +  2 H2O(l)

Q: Calculate the mass of silver nitrate, AgNO3 (aq) , that must react with solid copper to provide…

A: Molar mass of copper nitrate = 187.56 gmol-1 Molar mass of AgNO3 = 2× 169.87 = 340gmol-1

Q: Na,CO3(ag) + CaCl»(ag) → 2 NaCl(aq) + CaCO3(s) Calculate the volume (in mL) of 0.100 M CaCl2 needed…

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Q: 0.7532 g of copper turnings (molar mass: 63.546 g∙mol–1) are reacted with excess nitric acid.…

A: Disclaimer: In order to obtain copper sulfate the acid used in excess should be sulfuric acid and…

Q: A 30.0 mL sample of an unknown HClO4 solution requires 40.3 mL of 0.108 M NaOH for complete…

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Q: What is the molarity of a potassium triiodide solution, Kl3(aq), if 30.00 mL of the solution is…

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Q: . What mass of precipitate (in g) is formed when 55.2 mL of 0.500 M AlBr₃ reacts with excess AgNO₃…

A: As per our guidelines we can only solve first question. Please resubmit other questions as next…

Q: What mass of Mg, in g, is required to react with 59.4 mL of 0.309 M AgNO3 solution? Mg(s) +…

A: The question is based on quantitative analysis. we need to calculate mass of magnesium required to…

Q: What mass of precipitate (in g) is formed when 85.7 mL of 0.500 M FeCl₃ reacts with excess AgNO₃ in…

A: Given precipitation reaction; FeCl3 (aq) + 3 AgNO₃(aq) → 3 AgCl(s) + Fe(NO₃)₃(aq) Given volume of…

Q: Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For…

A: Given, Volume of 1.68 (M) of KMnO4 required for titration = 14.3 mL = 0.0143 L

Q: 2 The active agent in many hair bleaches is hydrogen peroxide. The amount of H₂O2 in 13.7-g of hair…

A: given, amount of hair bleach = 13.7 g For KMnO4 molarity = 0.174 M volume = 48.9 mL

Q: In solution, chlorine dioxide, ClO2 (aq), and hydroxide ions, OH (ag), react to form chlorate ions,…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: A sample contained a mixture of MgCO 3 and BaCO 3. The amount of MgCO 3 was determined by reacting…

A: The given reactions are:

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.300 M Ni(NO₃)₂ reacts with 33.0 mL of…

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Q: If 5.15 grams of copper metal react with 14.1 grams of silver nitrate, what is the mass of silver,…

A: This question can be solved by using the number of moles of each of the reactants and thereby…

Q: In a titration experiment, 15.75 mL of a 0.237 M NaOH solution was used to reach the end point of a…

A: The reaction taking place is given as, => HNO3 (aq) + NaOH (aq) -----------> NaNO3 (aq) + H2O…

Q: A 25.00 mL sample of NaOH is titrated with 21.35 mL of 0.6736 M H2SO4. What is the Molarity of the…

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Q: If 5.40 grams of copper metal react with 14.7 grams of silver nitrate, what is the mass of silver,…

A: Given: Mass of Cu = 5.40 g Mass of AgNO3  = 14.7 g Molar mass of Cu = 63.546 g/mol Molar mass of…

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.500 M Cu(NO₃)₂ reacts with 15.0 mL of…

A: The objective of this question is to find out the mass of the precipitate formed when a certain…

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.700 M Zn(NO₃)₂ reacts with 23.0 mL of…

A: Number of moles of substance=Concentration of substance x Volume of substanceFor…

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.600 M Cd(NO₃)₂ reacts with 26.0 mL of…

A: Moles = Molarity x Volume in L For Cd(NO₃)₂, Molarity=0.600 M  Volume=20.5 mL= 0.0205 L Moles =0.600…

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.700 M Zn(NO₃)₂ reacts with 31.0 mL of…

A: ZnNO32+2 NaOH→ZnOH2 s+2 NaNO3 aqStength of ZnNO32=20.5x0.700 M1000=0.0143Stength of NaOH=310x0.700…

Q: What is the net ionic equation for the chemical reaction that occurs when aqueous solutions of…

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Q: From the equation, what is the mass of NaOH when 5 g of Mg(OH)2 precipitates? What is its percent by…

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Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.300 M Ni(NO3)2 reacts with 40.0 mL of…

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Q: What concentration of Zn is present in solution when 5.93 g of zinc metal is used to displace…

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Q: To measure the amount of calcium carbonate (CaCO3) in a seashell, an analytical chemist crushes a…

A: Details

Q: What mass of precipitate (in g) is formed when 45.5 mL of 0.300 M Na PO reacts with 62.5 mL of 0.200…

A: Since, Molarity is the number of moles of solute dissolve in one litre of the solution. Thus,

Q: How many moles of the nitrate anion, NO3-1, are there in a 0.015 L sample of 0.15M Pb(NO3)2(aq)…

A: Given, the volume of solution =0.015 LConcentration of Pb(NO3)2(aq) =0.15 Mwe are asked to calculate…

Q: The following reaction occurs when two aqueous solutions are mixed: Cr(NO3)3(aq) + 3NaOH(aq)   →…

A: Ionic Equation :- In such chemical equation, we write all ions that reacted in the reaction. Net -…

Q: what mass precipitate (in g) is formed when 20.5 mL of0.800 M Co(NO3)2 reacts with 29.0 mL of 0.800…

A:

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.300 M Ni(NO₃)₂ reacts with 22.5 mL of…

A: According law of mass action, the same amount of mass involved in the reaction is formed as a…

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.500 M Cu(NO₃)₂ reacts with 34.5 mL of…

A: First calculate moles for both solutions. Then using mol to mol ratio, find out moles of precipitate…

Q: Consider the reaction shown below between hydroxide ions (OH), hypochlorite ions (CIO), and chromium…

A: A chemical reaction between hydroxide ions (OH-), hypochlorite ions (ClO-), and chromium hydroxide…

Q: if 30.0 g of NaOH is added to  0.800L of 1.00M Zn(NO3)2, what is the mass in grams of Zn(OH)2 will…

A: The balanced equation for the given precipitation reaction is as follows.…

Q: Concentration of calcium in a sample may be determined by precipitation using the chromate ion, Cro…

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Q: A solution is prepared by dissolving 37.5 g of barium hydroxide, Ba(OH)2, in a small amount of water…

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Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: The given reaction :  MnO2 (s) + 4 HCl (aq) ==> MnCl2 (aq) + 2H2O (l) + Cl2(g)  Volume of…

Q: what is the mass of silver, in grams, that can be theoretically produced?

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Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.400 M Mn(NO₃)₂ reacts with 32.0 mL of…

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Q: You have 0.685 g of an unknown acid, H₂A, which reacts with NaOH according to the balanced equation…

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Q: A noncarbonated soft drink contains an unknown amount of citric acid, H3 C6H5 O7. If 100. mL of the…

A: Given :  Volume = 100 ml  Volume of NaOH solution = 35.96 ml  Concentration of NaOH solution =…

Q: To analyze the alcohol content of a certain wine, a chemist needs 1.02 L of an aqueous 0.328 M K 2Cr…

A: Given data is as follows: The concentration of K2Cr2O7 = 0.328 M The volume of the solution = 1.02 L…

Q: What mass of precipitate (in g) is formed when 45.5 mL of 0.300 M Na₃PO₄ reacts with 64.0 mL of…

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Q: When 90.00 mL of 0.200 M MnO4–(aq) was reacted with 200.00 mL of 0.280M H2O2(aq), the amount of…

A: Percent yield is defined as the ratio of actual yield by theoretical yield multiplied by 100. Actual…

Q: The following chemical reaction takes place in aqueous solution: 2 AgF(aq)+ (NH4)₂CO3(aq)…

A:

Q: What mass of precipitate (in g) is formed when 20.5 mL of 0.800 M Co(NO₃)₂ reacts with 21.0 mL of…

A: The given chemical reaction is as follows: CoNO32(aq) + 2NaOH(aq) → Co(OH)2(s) + 2NaNO3(aq) The…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.