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12) From the following heats of combustion, CH,OH(1) + 0,(8) CO.(g) + 2H,0(1) AHn = -726.4 kJ/mol → CO(g) AHan = -393.5 kJ/mol H,O(I) AHn = -285.8 kJ/mol C(graphite) + O,(g) H,(8) + 0,(8) calculate the enthalpy of formation of methanol (CH3OH) from its elements: C(graphite) + 2H2(g) + 0,() CH,OH(I) 13) How many mL of a 0.375 M solution can be made from Y g of Ca3(PO4)2 (molar mass=310 g/mole)? 14) A solution concentration is Y ppm and is made with a solute that has molar mass equal to 650 g/mol. What is the molarity of the solution?

12) From the following heats of combustion, CH,OH(1) + 0,(8) CO.(g) + 2H,0(1) AHn = -726.4 kJ/mol → CO(g) AHan = -393.5 kJ/mol H,O(I) AHn = -285.8 kJ/mol C(graphite) + O,(g) H,(8) + 0,(8) calculate the enthalpy of formation of methanol (CH3OH) from its elements: C(graphite) + 2H2(g) + 0,() CH,OH(I) 13) How many mL of a 0.375 M solution can be made from Y g of Ca3(PO4)2 (molar mass=310 g/mole)? 14) A solution concentration is Y ppm and is made with a solute that has molar mass equal to 650 g/mol. What is the molarity of the solution?

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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12) From the following heats of combustion, CH,OH(I) + 0,(g) CO:(g) + 2H,0(1) AHn = -726.4 kJ/mol C(graphite) + O,(8) CO,(g) AHn = -393.5 kJ/mol H,O(1) AHan = -285.8 kJ/mol H2(8) + 0,(g) - calculate the enthalpy of formation of methanol (CH3OH) from its elements: C(graphite) + 2H2(g) + }0,(8) CH,OH(I) 13) How many mL of a 0.375 M solution can be made from Y g of Ca3(PO4)2 (molar mass=310 g/mole)? 14) A solution concentration is Y ppm and is made with a solute that has molar mass equal to 650 g/mol. What is the molarity of the solution?
Transcribed Image Text:12) From the following heats of combustion, CH,OH(I) + 0,(g) CO:(g) + 2H,0(1) AHn = -726.4 kJ/mol C(graphite) + O,(8) CO,(g) AHn = -393.5 kJ/mol H,O(1) AHan = -285.8 kJ/mol H2(8) + 0,(g) - calculate the enthalpy of formation of methanol (CH3OH) from its elements: C(graphite) + 2H2(g) + }0,(8) CH,OH(I) 13) How many mL of a 0.375 M solution can be made from Y g of Ca3(PO4)2 (molar mass=310 g/mole)? 14) A solution concentration is Y ppm and is made with a solute that has molar mass equal to 650 g/mol. What is the molarity of the solution?
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