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Moles grams in mass mass molar tros introductory

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moles grams in mass Mass Molar =

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Tro's Introductory Chemistry, Chapter 100 Write a Solution Map: P,V,T,R n when using the Ideal Gas Equation, the units of V must be L; and the units of P must be atm, or you will have to convert the units of T must be kelvin, K Information Given: V = 0.225 L, P = 886 mmHg, t = 55°C, m = 0.311 g Find: molar mass, (g/mol) Eq’n: PV = nRT; MM = mass/moles Example: A sample of a gas has a mass of 0.311 g. Its volume is 0.225 L at a temperature of 55°C and a pressure of 886 mmHg. Find its molar mass. Molar Mass mass PV = nRT
Tro's Introductory Chemistry, Chapter 101 Apply the Solution Map: convert the units K 328 T 273 55 T 273 C) t( T(K) = + = + ° = mmHg 58 6 1 1 mmHg 760 atm 1 mmHg 86 8 P . = × = Information Given: V = 0.225 L, P = 886 mmHg, t = 55°C, m = 0.311 g Find: molar mass, (g/mol) Eq’n: PV = nRT; MM = mass/moles SM: P,V,T,R → n & mass → mol. mass Example: A sample of a gas has a mass of 0.311 g. Its volume is 0.225 L at a temperature of 55°C and a pressure of 886 mmHg. Find its molar mass.

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Tro's Introductory Chemistry, Chapter 102 Apply the Solution Map: ( 29 ( 29 ( 29 ( 29 mol 10 06 4 9.7 n K 328 0.0821 L .225 0 atm 58 6 1 1 n T R V P T R n V P 3 - K mol atm L × = = = = . Information Given: V = 0.225 L, P = 1.16 58 atm, t = 328 K, m = 0.311 g Find: molar mass, (g/mol) Eq’n: PV = nRT; MM = mass/moles SM: P,V,T,R → n & mass → mol. mass Example: A sample of a gas has a mass of 0.311 g. Its volume is 0.225 L at a temperature of 55°C and a pressure of 886 mmHg. Find its molar mass. g/mol 31.9 Mass Molar moles 10 9.7406 0.311g Mass Molar moles grams in mass Mass Molar 3 - = × = =
Tro's Introductory Chemistry, Chapter 103 Check the Solution: molar mass = 31.9 g/mol The units of the answer, g/mol, are correct. It is hard to judge the magnitude with so many variables. Information Given: V = 0.225 L, P = 1.16 58 atm, t = 328 K, m = 0.311 g Find: molar mass, (g/mol) Eq’n: PV = nRT; MM = mass/moles SM: P,V,T,R → n & mass → mol. mass Example: A sample of a gas has a mass of 0.311 g. Its volume is 0.225 L at a temperature of 55°C and a pressure of 886 mmHg. Find its molar mass.

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Tro's Introductory Chemistry, Chapter 104 Ideal vs. Real Gases Real gases often do not behave like ideal gases at high pressure or low temperature Ideal gas laws assume 1) no attractions between gas molecules 2) gas molecules do not take up space based on the Kinetic-Molecular Theory at low temperatures and high pressures these assumptions are not valid
Tro's Introductory Chemistry, Chapter 105 Ideal vs. Real

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106 Mixtures of Gases According to Kinetic Molecular Theory, the particles in a gas behave independently Air is a mixture, yet we can treat it as a single gas Also, we can think of each gas in the mixture independent of the other gases though all gases in the mixture have the same volume and temperature all gases completely occupy the container, so all gases in the mixture have the volume of the container Gas % in Air, by volume Gas % in Air, by volume nitrogen, N 2 78 argon, Ar 78 oxygen, O 2 21 carbon dioxide, CO 2 21
Tro's Introductory Chemistry, Chapter 107 Partial Pressure each gas in the mixture exerts a pressure independent of the other gases in the mixture

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