Tooth enamel is the hardest substance in the body and is mainly the mineral hydroxyapatite, Ca10(PO4)6(OH)2. If 1.000 g of tooth enamel reacts with hydrochloric acid to give 0.925 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: An alloy of iron and carbon was treated with sulfuric acid, in which only iron reacts. 2 Fe(s)+3 H 2…

A: % of Fe in alloy = weight of Fe /weight of alloy x 100

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A: The molecular weight or molar mass of any substance is the sum of the mass of each element. If the…

Q: Exactly 6.21 g of MgCl2 (molar mass = 95.2 g/mol) was dissolved in water.  An analysis indicated…

A:

Q: An analytical chemist weighs out 0.344 g of an unknown diprotic acid into a 250 mL volumetric flask…

A: Given: Mass of acid = 0.344 g Molarity of NaOH = 0.0700 M Volume of NaOH = 65.5 mL = 0.0655 L

Q: 1.58g of magnesium hydrogencarbonate was added to a 1.68 mol/L solution of acetic acid, CH3COOH in…

A:

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A: To solve this problem we will first calculate the number of moles of KMnO4   Then Molarity will be…

Q: An unspecified amount of sulfuric acid is added to 1.19 g of solid barium chloride, then water is…

A: Given: mass of BaCl2 = 1.19 g Total volume of solution = 1.72 L molar mass of BaCl2 = 208.23 g/mol

Q: a) Write a balanced chemical equation for the reaction.  b) What mass of acetic acid is in the…

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Q: If 45.4 mL of 0.25 M HCl(aq) reacts with an excess of Mg(OH)2(aq), what mass of magnesium chloride…

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A: The given reaction is,

Q: Many mining operations produce tailings that can be oxidized to form acids, including sulfuric acid.…

A: Given, 4CuFeS2(s)+17O2(g) +10H2O(I)→4Fe(OH)3(s)+4CuSO4(aq)+4H2SO4(aq)mass of sample CuFeS2(s) = 1.67…

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Q: How many grams of sodium dichromate, Na2 Cr2 O7, should be added to a 100.0-mL volumetric flask to…

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Q: Potassium hydrogen phthalate, KHP, is often used as a primary standard for the standardization of…

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Q: Consider the following chemical reaction. 3 Zn(C:H:O:):(aq) + 2 Na:PO:(aq) → 6 NaC:H:O:(aq) +…

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Q: One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(III) hydroxide…

A: The solution is provided in the next step:

Q: A mixture of barium chloride and sulfuric acid yield the precipitate barium sulfate and hydrochloric…

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

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A: Interpretation: From the given information, The final concentration of Cr3+ (aq)  and the number of…

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A:

Q: You have equal masses of different solutes dissolved in equal volumes of solution. Which of the…

A: Molarity is Number of moles of Solute present in one liter of solution. It can be represented by M.…

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A:

Q: If you are asked to prepare a 3.10 M NaOH solution in the laboratory, to what volume should you…

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Q: diluted

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Q: question 2 please

A: Given data:

Q: One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is…

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Q: The balanced chemical equation for the reaction between calcium hydroxide and hydrochloric acid is:…

A:

Q: In the laboratory you dissolve 21.5 g of sodium carbonate in a volumetric flask and add water to a…

A:

Q: A stock potassium dichromate solution (K,Cr,O,; molar mass is 294.2 g/mol) is prepared for dilution…

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A:

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A:

Q: A chemistry student weighs out 0.0960 g of phosphoric acid (H,PO4), a triprotic acid, into a 250. mL…

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A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: 0.41g of an unknown acid, HA, titrated with NaOH. If the acid reacts with 28.10 mL of 0.1055 M NaOH…

A: Given data,   28.10 mL = 0.02810 L of NaOH   Molarity of NaOH =0.1055 M

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A: The balance chemical reaction ,                                            K2S + 2HCl = H2S + 2KCl…

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A: The answer to the following question is given as:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".