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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter3: Stoichiometry

Section: Chapter Questions

Problem 12ALQ

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Hey may you please help me with Q' a and b

QUESTION 1
Chemical analysis was performed on a compound with formula C,HySinOz
Sample 1: Combustion analysis of a 7.321 g sample produced 12.113 g CO2 and 6.311 g H20
Sample 2: Silicon analysis of a 3.481 g sample produced 2.144 g SIO2
Sample 3: Molar mass range: 290 to 320 g/mol
NB! Only use the atomic masses in the periodic table on the standard information page.
(a) Determine the empirical formula.
(b) Determine the molecular formula and enter the values of x, y, n and z

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1, A mineral sample is obtained from a region of the country that has high arsenic contamination. An elemental analysis yields the following elemental composition: Element Atomic Weight (g/mol) Percent Composition Zn 65.409 23.4% As 74.9216 53.7% O 15.9994 22.9% What is the empirical formula of this mineral? Group of answer choices ZnAsO4 Zn2AsO3 Zn2AsO4 ZnAs2O4 2.A mineral sample is obtained from a region of the country that has high arsenic contamination. An elemental analysis yields the following elemental composition: Element Atomic Weight (g/mol) Percent Composition Co 58.9332 21.2% Fe 55.845 6.71% As 74.9216 72.0% What is the empirical formula of this mineral? Group of answer choices Co3FeAs8 Co2FeAs8 Co8FeAs3 CoFe3As8 CoFeAs
3, A mineral sample is obtained from a region of the country that has high arsenic contamination. An elemental analysis yields the following elemental composition: Element Atomic Weight (g/mol) Percent Composition Cu 63.546 22.9% As 74.9216 54.0% O 15.9994 23.1% What is the empirical formula of this mineral? Group of answer choices CuAs2O4 CuAs2O3 Cu4As2O CuAsO Cu2AsO4 5.A mineral sample is obtained from a region of the country that has high arsenic contamination. An elemental analysis yields the following elemental composition: Element Atomic Weight (g/mol) Percent Composition Cu 63.546 30.2% Zn 65.409 15.5% As 74.9216 23.7% S 32.065 30.5% What is the empirical formula of this mineral? Group of answer choices Cu6Zn3As4S10 Cu3Zn6As4S12 Cu5Zn3As4S12 Cu6Zn3As3S12 Cu6Zn3As4S12
5, A mineral sample is obtained from a region of the country that has high arsenic contamination. An elemental analysis yields the following elemental composition: Element Atomic Weight (g/mol) Percent Composition Cu 63.546 30.2% Zn 65.409 15.5% As 74.9216 23.7% S 32.065 30.5% What is the empirical formula of this mineral? Group of answer choices A, Cu6Zn3As4S12 B, Cu5Zn3As4S12 C, Cu6Zn3As4S10 D, Cu6Zn3As3S12 Cu3Zn6As4S12
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1.A compound is composed of the elements C, H, O, and Br. Combustion analysis of a 6.17 g sample of the compound produced 3.91 g of carbon dioxide and 1.20 g of water. In a separate experiment reaction of a 2.63 g sample of the compound with excess silver produced 3.56 g of AgBr. What is the empirical formula of the compound? Group of answer choices none of the answers are correct C3H3O2Br C2HO2Br C2H3O2Br
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