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1. Naturally occurring copper has two isotopes with relative atomic masses 62.9 3 and 64.928. if the average relative atomic mass is 63.546, what are the relat ve % abundances of the two isotopes in this sample. 2. Magnesium hydroxide, Mg(OH)2, can be commonly found in antacids. Calcula te the percentage composition, by mass, of each element in magnesium hydro

1. Naturally occurring copper has two isotopes with relative atomic masses 62.9 3 and 64.928. if the average relative atomic mass is 63.546, what are the relat ve % abundances of the two isotopes in this sample. 2. Magnesium hydroxide, Mg(OH)2, can be commonly found in antacids. Calcula te the percentage composition, by mass, of each element in magnesium hydro

Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter5: Stoichiometry
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Problem 23Q: Reference Section 5-2 to find the atomic masses of 12C and 13C, the relative abundance of 12C and...
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10:39 pm ( More CHM101 ASSIG.. LEVY MWANAWASA MEDICAL UNIVERSITY INSTITUTE OF BASIC AND BIOMEDICAL SCIENCES NATURAL SCIENCES DEPARTMENT: CHEMISTRY SECTION ACADEMIC YEAR 2020/2021 TERM 1 CHM 101: FOUNDATION CHEMISTRY 13th April 2021 ASSIGNMENT (ONE) 1: DUE 20TH April 2021 1. Naturally occurring copper has two isotopes with relativeatomic masses 62.9 3 and 64.928. if the average relative atomic mass is 63.546, what are the relati ve % abundances of the two isotopes in this sample. 2. Magnesium hydroxide, Mg(OH)2, can be commonly found in antacids. Calcula te the percentage composition, by mass, of each element in magnesium hydro xide. 3. 21.2 g sample of a compound that contained carbon, hydrogen, and oxygen w as burned in excess oxygen. The water (H0) that was produced weighed 10.8 Ogand the carbon dioxide (CO2) weighed 26.40 g. The molar mass of the com pound was determined to be 212 g/mol. What is the molecular formula of the compound? 4. A solution of 100.00 mL of 0.2000 mol/L sodium carbonate and 200.00 mL of 0.1000 mol/L calcium nitrate solution are mixed together according to the rea ction: NaCO, (ag) + Ca (NO), (ag) - Caco, (s) + 2Na NO,(ag) (a) Calculate the mass of calcium carbonate that would precipitate. (b) What is the concentration of sodium nitrate solution that will be produced? 5. Silver reacts with hydrogen sulphide gas, and oxygen according to the reactio n: Ag(s) + 2H S(9) +0,l9) -2Ao, S (g) + 2H,0(g) How many grams of silver sulphide are formed when 1.90 g of silver reacts with 0.280 g of hydrogen sulphide and 0.160 g of oxygen? 6. Ammonia nitrate is produced when ammonia is combined with nitric acid as s 1|Pagel Q Edit Fit screen Search Save as
Transcribed Image Text:10:39 pm ( More CHM101 ASSIG.. LEVY MWANAWASA MEDICAL UNIVERSITY INSTITUTE OF BASIC AND BIOMEDICAL SCIENCES NATURAL SCIENCES DEPARTMENT: CHEMISTRY SECTION ACADEMIC YEAR 2020/2021 TERM 1 CHM 101: FOUNDATION CHEMISTRY 13th April 2021 ASSIGNMENT (ONE) 1: DUE 20TH April 2021 1. Naturally occurring copper has two isotopes with relativeatomic masses 62.9 3 and 64.928. if the average relative atomic mass is 63.546, what are the relati ve % abundances of the two isotopes in this sample. 2. Magnesium hydroxide, Mg(OH)2, can be commonly found in antacids. Calcula te the percentage composition, by mass, of each element in magnesium hydro xide. 3. 21.2 g sample of a compound that contained carbon, hydrogen, and oxygen w as burned in excess oxygen. The water (H0) that was produced weighed 10.8 Ogand the carbon dioxide (CO2) weighed 26.40 g. The molar mass of the com pound was determined to be 212 g/mol. What is the molecular formula of the compound? 4. A solution of 100.00 mL of 0.2000 mol/L sodium carbonate and 200.00 mL of 0.1000 mol/L calcium nitrate solution are mixed together according to the rea ction: NaCO, (ag) + Ca (NO), (ag) - Caco, (s) + 2Na NO,(ag) (a) Calculate the mass of calcium carbonate that would precipitate. (b) What is the concentration of sodium nitrate solution that will be produced? 5. Silver reacts with hydrogen sulphide gas, and oxygen according to the reactio n: Ag(s) + 2H S(9) +0,l9) -2Ao, S (g) + 2H,0(g) How many grams of silver sulphide are formed when 1.90 g of silver reacts with 0.280 g of hydrogen sulphide and 0.160 g of oxygen? 6. Ammonia nitrate is produced when ammonia is combined with nitric acid as s 1|Pagel Q Edit Fit screen Search Save as
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