Hydrogen Sulfide (H2S) Technical Information
... digestion of organic matter by bacteria (swamps, sewers, etc.). Additional sources include volcanic gases, natural gas, and some well waters. H2S is produced in small amounts by the human body to be used as a signaling molecule. It is most commonly acquired by separating it from sour gas, natural ga ...
... digestion of organic matter by bacteria (swamps, sewers, etc.). Additional sources include volcanic gases, natural gas, and some well waters. H2S is produced in small amounts by the human body to be used as a signaling molecule. It is most commonly acquired by separating it from sour gas, natural ga ...
Topic 1: Quantitative Chemistry
... Moles(n) = Volume (V) / molar volume (Vmolar) 1. Calculate the moles of chlorine in 44.8 cm3 of the gas at STP 2. Calculate the volume occupied by 4.40 g of carbon dioxide at STP. 3. What volume of hydrogen gas is produced when 0.056 g of lithium reacts with water? Assume the volume is measured at S ...
... Moles(n) = Volume (V) / molar volume (Vmolar) 1. Calculate the moles of chlorine in 44.8 cm3 of the gas at STP 2. Calculate the volume occupied by 4.40 g of carbon dioxide at STP. 3. What volume of hydrogen gas is produced when 0.056 g of lithium reacts with water? Assume the volume is measured at S ...
Name ionic compounds containing main group or
... The volume of a gas is 158 liters when the pressure is 763 torr and the temperature is 21ºC. The volume expands to 192 liters when the pressure is changed to 548 torr. How much has the temperature CHANGED Celsius? (a) 37.4ºC (b) 16.4oC (c) - 4.6oC (d) -16.4oC (e) -37.4oC ...
... The volume of a gas is 158 liters when the pressure is 763 torr and the temperature is 21ºC. The volume expands to 192 liters when the pressure is changed to 548 torr. How much has the temperature CHANGED Celsius? (a) 37.4ºC (b) 16.4oC (c) - 4.6oC (d) -16.4oC (e) -37.4oC ...
Chemistry Review
... Fluids – gases and liquids, flow Ideal gas – imaginary gas that fits all the assumptions of the kinetic molecular theory Kelvin – SI unit of temperature Kinetic Theory- group of ideas explaining the interaction of matter and energy due to particle motion Melting – change in state from a solid to a l ...
... Fluids – gases and liquids, flow Ideal gas – imaginary gas that fits all the assumptions of the kinetic molecular theory Kelvin – SI unit of temperature Kinetic Theory- group of ideas explaining the interaction of matter and energy due to particle motion Melting – change in state from a solid to a l ...
end of year review
... B. All matter is composed of tiny, discrete particles called atoms. C. Electrons orbit the nucleus of an atom at distinct energy levels. D. Atoms are composed of positively and negatively charged particles. ...
... B. All matter is composed of tiny, discrete particles called atoms. C. Electrons orbit the nucleus of an atom at distinct energy levels. D. Atoms are composed of positively and negatively charged particles. ...
Equilibrium Constant- Keq
... 3. Sulfur dioxide gas (0.141 mol/L) and oxygen gas (0.25 mol/L) are produced when sulfur trioxide gas (1.6 mol/L) is decomposed. a) Write a balanced chemical equation b) Write the equilibrium law c) Calculate the equilibrium constant d) Describe the percent reaction. 4. Hydrogen Chloride is produced ...
... 3. Sulfur dioxide gas (0.141 mol/L) and oxygen gas (0.25 mol/L) are produced when sulfur trioxide gas (1.6 mol/L) is decomposed. a) Write a balanced chemical equation b) Write the equilibrium law c) Calculate the equilibrium constant d) Describe the percent reaction. 4. Hydrogen Chloride is produced ...
Final Exam Review
... 7. If 100 moles of Mg and 100 moles of O2 are allowed to react to form MgO, the maximum mass of MgO that can be formed is (Ch. 9) 2 Mg + O2 → 2 MgO 8. Which of the following statements about ionic and covalent bonding is false? (Ch. 12) a. Covalent bonds are always formed between atoms having high i ...
... 7. If 100 moles of Mg and 100 moles of O2 are allowed to react to form MgO, the maximum mass of MgO that can be formed is (Ch. 9) 2 Mg + O2 → 2 MgO 8. Which of the following statements about ionic and covalent bonding is false? (Ch. 12) a. Covalent bonds are always formed between atoms having high i ...
File
... In a physical change, the substance involved remains the same. The substance may change form or state, however. All changes of state are physical changes. There are other physical changes that are not changes of state. Dissolving is a physical change. When sugar is dissolved it spreads out in the wa ...
... In a physical change, the substance involved remains the same. The substance may change form or state, however. All changes of state are physical changes. There are other physical changes that are not changes of state. Dissolving is a physical change. When sugar is dissolved it spreads out in the wa ...
Chapter 4,5,6
... 3. A 0.500 L sample of H2SO4 solution was analyzed by taking a 100.0 mL portion and adding 50.0 mL of 0.213 M NaOH. After the reaction occurred, an excess of OH- ions remained in the solution. The excess base required 13.21 mL of 0.103 M HCl for neutralization. Calculate the molarity of the original ...
... 3. A 0.500 L sample of H2SO4 solution was analyzed by taking a 100.0 mL portion and adding 50.0 mL of 0.213 M NaOH. After the reaction occurred, an excess of OH- ions remained in the solution. The excess base required 13.21 mL of 0.103 M HCl for neutralization. Calculate the molarity of the original ...
104 Homework Packet - Rogue Community College
... According to Le Chatelier’s Principle, adding reactants (or removing products) drives the equilibrium to the __________, adding products (or removing reactants) drives the equilibrium to the __________, increasing temperature favors the ___________________ reaction, decreasing temperature favors the ...
... According to Le Chatelier’s Principle, adding reactants (or removing products) drives the equilibrium to the __________, adding products (or removing reactants) drives the equilibrium to the __________, increasing temperature favors the ___________________ reaction, decreasing temperature favors the ...
end of year review
... _____ 4. Which of the following correctly pairs a phase of matter with its description? A. Solid: Particles have no motion. B. Liquid: Particles expand to fill any container in which they are placed. C. ...
... _____ 4. Which of the following correctly pairs a phase of matter with its description? A. Solid: Particles have no motion. B. Liquid: Particles expand to fill any container in which they are placed. C. ...
CHM 151LL: States of Matter: Physical and Chemical Changes
... Substances can exist in three physical states: solid, liquid, and gas. Some of the differences between these states of matter are 1) the atoms’ or molecules’ freedom of movement and 2) the amount of space between the atoms or molecules. The physical state of a substance at a specific temperature dep ...
... Substances can exist in three physical states: solid, liquid, and gas. Some of the differences between these states of matter are 1) the atoms’ or molecules’ freedom of movement and 2) the amount of space between the atoms or molecules. The physical state of a substance at a specific temperature dep ...
Camp 1 - Quynh Nguyen Official Website
... Separation of the components of a mixture by physical means by using a porous medium, such as filter paper, to separate components based upon relative particles sizes. Filtration is based on the physical properties of a mixture: The particle sizes of a component to be separated must be significantly ...
... Separation of the components of a mixture by physical means by using a porous medium, such as filter paper, to separate components based upon relative particles sizes. Filtration is based on the physical properties of a mixture: The particle sizes of a component to be separated must be significantly ...
Chemical Reactions
... 22. Given 500 cm3 of methane gas at 2.5 atm and 20 oC. What would be the volume of the gas at STP? 23. What pressure is exerted by 2 moles of a gas in a 500 cm 3 container at 25 oC? 24. Two hundred cubic centimeters of a gas are collected by water displacement. The conditions at time are 1.1 atm and ...
... 22. Given 500 cm3 of methane gas at 2.5 atm and 20 oC. What would be the volume of the gas at STP? 23. What pressure is exerted by 2 moles of a gas in a 500 cm 3 container at 25 oC? 24. Two hundred cubic centimeters of a gas are collected by water displacement. The conditions at time are 1.1 atm and ...
Instrumental Analysis as Applied to Architectural Materials
... This article provides a basic overview of some of the analytical techniques commonly used in the identification of architectural materials. Other techniques that may be used include Raman spectroscopy, atomic absorption, Xray fluorescence, mass spectrometry, differential thermal analysis, and many o ...
... This article provides a basic overview of some of the analytical techniques commonly used in the identification of architectural materials. Other techniques that may be used include Raman spectroscopy, atomic absorption, Xray fluorescence, mass spectrometry, differential thermal analysis, and many o ...
Feasibility Study of using FAIMS to Detect Carbonyl Sulfide in Propane
... Sample preparation and introduction FAIMS can be used to detect volatiles in aqueous, solid and gaseous matrices and can consequently be used for a wide variety of applications. The user requirements and sample matrix for each application define the sample preparation and introduction steps required ...
... Sample preparation and introduction FAIMS can be used to detect volatiles in aqueous, solid and gaseous matrices and can consequently be used for a wide variety of applications. The user requirements and sample matrix for each application define the sample preparation and introduction steps required ...
Exam 1 Review
... Calculate ΔH using: Hess’s Law, heats of formation, bond dissociation energies Given ΔH for a reaction, how much heat is released when 20 g of product is formed? (hint – use the balanced chemical equation to solve) Find heat needed to change water at 20 °C to steam at 100 °C. Does entropy increase o ...
... Calculate ΔH using: Hess’s Law, heats of formation, bond dissociation energies Given ΔH for a reaction, how much heat is released when 20 g of product is formed? (hint – use the balanced chemical equation to solve) Find heat needed to change water at 20 °C to steam at 100 °C. Does entropy increase o ...
AP Chem
... D. Fluorine has a greater atomic mass. E. Fluorine has a greater atomic radius. 24. Which of the following regarding elemental nitrogen is not true? A. It contains one sigma bond. B. It contains two pi bonds? C. It has a bond order of three. D. It has a large dipole moment. E. It exists as a diatomi ...
... D. Fluorine has a greater atomic mass. E. Fluorine has a greater atomic radius. 24. Which of the following regarding elemental nitrogen is not true? A. It contains one sigma bond. B. It contains two pi bonds? C. It has a bond order of three. D. It has a large dipole moment. E. It exists as a diatomi ...
AP Chemistry Summer Assignment
... 31. Sodium hydroxide reacts with carbon dioxide as follows: 2 NaOH(s) + CO2 (g) → Na2CO3 (s) + H2O(l) Which reagent (reactant) is limiting when 1.85 mol of sodium hydroxide and 1.00 mol carbon dioxide are allowed to react? How many moles of sodium carbonate can be produced? How many moles of the ex ...
... 31. Sodium hydroxide reacts with carbon dioxide as follows: 2 NaOH(s) + CO2 (g) → Na2CO3 (s) + H2O(l) Which reagent (reactant) is limiting when 1.85 mol of sodium hydroxide and 1.00 mol carbon dioxide are allowed to react? How many moles of sodium carbonate can be produced? How many moles of the ex ...
HELIUM - IDC
... Most terrestrial helium is created by the natural radioactive decay of heavy radioactive elements such as thorium and uranium. Radiogenic helium is trapped in natural gas reservoirs in concentrations of up to 7% by volume. ...
... Most terrestrial helium is created by the natural radioactive decay of heavy radioactive elements such as thorium and uranium. Radiogenic helium is trapped in natural gas reservoirs in concentrations of up to 7% by volume. ...
CHM 151LL: States of Matter: Physical and Chemical Changes
... Substances can exist in three physical states: solid, liquid, and gas. Some of the differences between these states of matter are 1) the atoms’ or molecules’ freedom of movement and 2) the amount of space between the atoms or molecules. The physical state of a substance at a specific temperature dep ...
... Substances can exist in three physical states: solid, liquid, and gas. Some of the differences between these states of matter are 1) the atoms’ or molecules’ freedom of movement and 2) the amount of space between the atoms or molecules. The physical state of a substance at a specific temperature dep ...
Chapter 2
... • This screen being projected on is matter. • All the materials you can hold or touch is ...
... • This screen being projected on is matter. • All the materials you can hold or touch is ...
Gas chromatography
Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Typical uses of GC include testing the purity of a particular substance, or separating the different components of a mixture (the relative amounts of such components can also be determined). In some situations, GC may help in identifying a compound. In preparative chromatography, GC can be used to prepare pure compounds from a mixture.In gas chromatography, the mobile phase (or ""moving phase"") is a carrier gas, usually an inert gas such as helium or an unreactive gas such as nitrogen. The stationary phase is a microscopic layer of liquid or polymer on an inert solid support, inside a piece of glass or metal tubing called a column (a homage to the fractionating column used in distillation). The instrument used to perform gas chromatography is called a gas chromatograph (or ""aerograph"", ""gas separator"").The gaseous compounds being analyzed interact with the walls of the column, which is coated with a stationary phase. This causes each compound to elute at a different time, known as the retention time of the compound. The comparison of retention times is what gives GC its analytical usefulness.Gas chromatography is in principle similar to column chromatography (as well as other forms of chromatography, such as HPLC, TLC), but has several notable differences. First, the process of separating the compounds in a mixture is carried out between a liquid stationary phase and a gas mobile phase, whereas in column chromatography the stationary phase is a solid and the mobile phase is a liquid. (Hence the full name of the procedure is ""Gas–liquid chromatography"", referring to the mobile and stationary phases, respectively.) Second, the column through which the gas phase passes is located in an oven where the temperature of the gas can be controlled, whereas column chromatography (typically) has no such temperature control. Finally, the concentration of a compound in the gas phase is solely a function of the vapor pressure of the gas.Gas chromatography is also similar to fractional distillation, since both processes separate the components of a mixture primarily based on boiling point (or vapor pressure) differences. However, fractional distillation is typically used to separate components of a mixture on a large scale, whereas GC can be used on a much smaller scale (i.e. microscale).Gas chromatography is also sometimes known as vapor-phase chromatography (VPC), or gas–liquid partition chromatography (GLPC). These alternative names, as well as their respective abbreviations, are frequently used in scientific literature. Strictly speaking, GLPC is the most correct terminology, and is thus preferred by many authors.