Z4 ORMULA MASS : PARTICIPATION FM? 1 C,H,NO, acetaminophen, a pain-killing drug 2. Cu, (OH),(CO,)-Basic copper carbonate, used in fireworks to give a blue-green color KAL, (SI,Al)0,,(OH),F,-muscovite mineral

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Qu The amount of calcium carbonate with MM:100.1 g/mol in the ore dolomite can be determined by gravimetry. The dolomite sample is dissolved in acid and the calcium ions (Ca2*) present are precipitated as calcium oxalate (CaC204) with MM: 128.1 g/mol. The calcium oxalate is filtered, dried and strongly heated to form calcium oxide (Cao) with Formula Mass (FM) = 56.1 g mol". In one analysis the mass of dolomite used was 3.72 %3D g. The mass of calcium oxide formed was found to be 1.24 g. Questions: 1. What is the chemical formula of the analyte in this problem? 2. What is precipitating agent? 3. Give the molecular formula of the precipitate measured in this problem. g. 4. What is the mass(g) of the analyte? Show your answer in correct no. of SF. 5. What is the % w/w of the analyte in the sample? Give the answer in correct answer of SF. 026.9 033.3 056 060.1 02.23

A chemist dissolves a 1.497-g sample of a type of metal (an alloy of Sn, Pb, Sb, and Cu) in nitric acid, and metastannic acid, H2SnO3, is precipitated. She heats the precipitate to drive off the water, which leaves 0.4909 g of tin(IV) oxide. What was the percentage of [in in the original sample?

8.25 g of o samplo of iron ora iron (m) oxido, Fo0:] wore dissolvod in concentratod hydrochlorC acid and the solution diutod to 250 ml 25.0 ml of this solution was roduced to form a solution of iron() ions. This solution of iron (1) ions roquired 264 mi of a00200 M potassium dichromato(vi) solution for completo oxidation back to iron(i) ions. The mass parcontogo of the ron in the ora is x(Fo=55.845 g/mal). CrO+6Fo+14H 2Cr+ GFe"+7H;0 Experiment 3: Neutrolization Titration if an unknown samplo of HPO was titratod with a10 M standard solution of NaOH using phonoiphthaloin indicator. O0 mt of NOOH was noodod to roach the ond point. Tha mass of HyPO4 in this sample is 98.0 g/mol) g (Molor moss of HyPOA

·25% b.5.0% C.I0% d 50% this reaction Consider 3Mg+2H3PO > Mg(PO)2+3 Hz * how many gram S Of magnesiumonosenate snould be producediF 5.4o grams Of magm re00+with excess nosphori OOCI0 a75 gra m b9.5grams C58.49rams d 1.80 grams esiun

IMG_9524.HEIC Open with Preview enow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=Dassignmen Use t The following are unbalanced equations. They show the kinds of reactal H2O2 H20+ 02 decomposition (b) Fe + O, → FeO (c) HCI + 02 → H2O - Cl, (d) H,SO, - Zn(OH)2→ ZnSO,+ H2O Submit Answer Try Another Version 1 item attempt remaining

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. When titrated in neutral solution with 0.05000 N I2, a mixture of As2O3, AS2O5, and inert material requires 20.10 mL. The resulting solution is then acidified, and excess KI is added. The liberated Iz requires 29.92 mL of 0.1500 N Na,S,O3. Calculate the sum of the weights of As2O3 and As2O5 in the sample.

Use the following atomic masses (in g/mol): Mg = 24.31; O = 16; Ca = 40.08; C = 12.01; Na = 23; H = 1; N = 14.01; S = 32.06; Cl = 35.45;  6.) A 10mL sample of H2SO4 solution required 16.85mL of NaOH solution in a titration. Each mL of NaOH solution was equivalent to 0.2477g of KHC8H4O4. Calculate the % of H2SO4 content in the sample.