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5. A 295 g sample of unknown metal is at an initial temperature of 13.00 °C absorbs 75.0 kJ. The final temperature of the system is 295 °C. What is the specific heat? What is the metal?

5. A 295 g sample of unknown metal is at an initial temperature of 13.00 °C absorbs 75.0 kJ. The final temperature of the system is 295 °C. What is the specific heat? What is the metal?

Chemistry
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
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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5. A 295 g sample of unknown metal is at an initial temperature of 13.00 °C absorbs 75.0 kJ. The final temperature of the system is 295 °C. What is the specific heat? What is the metal? motyl 6. How many Joules are required to heat 706 g of nickel from 25 °C to 300 °C? (C=0.444 J/g - °C) 30TE moil aloos toinibin 1638 7. How many Joules are required to heat 55.8 g of tin from 36.4 °C to 47.7 °C? (C=0.213 J/g °C) bnomaib art to food olin sit omiuole 2015 ai mataya sdi to studenogast to 1 880
Transcribed Image Text:5. A 295 g sample of unknown metal is at an initial temperature of 13.00 °C absorbs 75.0 kJ. The final temperature of the system is 295 °C. What is the specific heat? What is the metal? motyl 6. How many Joules are required to heat 706 g of nickel from 25 °C to 300 °C? (C=0.444 J/g - °C) 30TE moil aloos toinibin 1638 7. How many Joules are required to heat 55.8 g of tin from 36.4 °C to 47.7 °C? (C=0.213 J/g °C) bnomaib art to food olin sit omiuole 2015 ai mataya sdi to studenogast to 1 880
Name Period Date Unit 4 Review Worksheet #2 Empirical and Molecular Formulas Directions: Please complete this on a separate piece of paper. 1. What is the empirical formula and empirical formula mass of each of the following compounds? a. C₂H4 b. C₂H6O2 c. N₂Os d. Ba3(PO4)2 e. Teal16 2. What is the molecular formula of each compound? a. Empirical Formula CH (M = 78.11 g/mol) b. Empirical Formula C3H6O2 (M = 74.08 g/mol) c. Empirical Formula HgCl (M = 472.1 g/mol) d. Empirical Formula C7H4O2 (M = 240.20 g/mol) 3. A chloride of silicon contains 79.1% Cl. If the molar mass is 269 g/mol, what is the empirical and molecular formula? 4. Cortisol (M = 362.47 g/mol), one of the major steroid hormones, is a key factor in the synthesis of protein. Its profound effect on the reduction of inflammation explains its use in the treatment of rheumatoid arthritis. Cortisol is 69.6% C, 8.34% H, and 22.1% 0. What is its empirical and molecular formula? 5. A 50.51 g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of phosphorus atoms were produced. What is the empirical formula of the compound? 6. When 2.5000 g of an oxide of mercury (HgxOy) is decomposed into the elements by heating, 2.405 g of mercury are produced. Calculate the empirical formula. 7. A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine? C = 34.95% H=6.844% 0=46.56% N = 13.59%
Transcribed Image Text:Name Period Date Unit 4 Review Worksheet #2 Empirical and Molecular Formulas Directions: Please complete this on a separate piece of paper. 1. What is the empirical formula and empirical formula mass of each of the following compounds? a. C₂H4 b. C₂H6O2 c. N₂Os d. Ba3(PO4)2 e. Teal16 2. What is the molecular formula of each compound? a. Empirical Formula CH (M = 78.11 g/mol) b. Empirical Formula C3H6O2 (M = 74.08 g/mol) c. Empirical Formula HgCl (M = 472.1 g/mol) d. Empirical Formula C7H4O2 (M = 240.20 g/mol) 3. A chloride of silicon contains 79.1% Cl. If the molar mass is 269 g/mol, what is the empirical and molecular formula? 4. Cortisol (M = 362.47 g/mol), one of the major steroid hormones, is a key factor in the synthesis of protein. Its profound effect on the reduction of inflammation explains its use in the treatment of rheumatoid arthritis. Cortisol is 69.6% C, 8.34% H, and 22.1% 0. What is its empirical and molecular formula? 5. A 50.51 g sample of a compound made from phosphorus and chlorine is decomposed. Analysis of the products showed that 11.39 g of phosphorus atoms were produced. What is the empirical formula of the compound? 6. When 2.5000 g of an oxide of mercury (HgxOy) is decomposed into the elements by heating, 2.405 g of mercury are produced. Calculate the empirical formula. 7. A component of protein called serine has an approximate molar mass of 100 g/mole. If the percent composition is as follows, what is the empirical and molecular formula of serine? C = 34.95% H=6.844% 0=46.56% N = 13.59%
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