Chemistry 12 Keq WORKSHEET #1
... a mixture is 0.50 M and H2 is 2.0 M, determine the concentration of ammonia. 5. At 2000oK, a mixture of H2, S2, and H2S rapidly reaches a state of equilibrium represented by the equation : 2 H2S (g) <===> 2 H 2(g) + S2 (g) An analysis of the equilibrium mixture in a 2.00 litre flask reveals the pres ...
... a mixture is 0.50 M and H2 is 2.0 M, determine the concentration of ammonia. 5. At 2000oK, a mixture of H2, S2, and H2S rapidly reaches a state of equilibrium represented by the equation : 2 H2S (g) <===> 2 H 2(g) + S2 (g) An analysis of the equilibrium mixture in a 2.00 litre flask reveals the pres ...
Oobleck Worksheet - Science Education at Jefferson Lab
... • use all of their senses, except taste, to discover as many properties of Oobleck as they can • record their observations on the Oobleck Investigation Sheet • classify each property they find as being a property shared by solids, liquids or gases • determine Oobleck’s state of matter Questions to A ...
... • use all of their senses, except taste, to discover as many properties of Oobleck as they can • record their observations on the Oobleck Investigation Sheet • classify each property they find as being a property shared by solids, liquids or gases • determine Oobleck’s state of matter Questions to A ...
Acrobat () verson
... depth of answer that is expected. You should not be surprised to find that the depth of understanding expected in your answers to these questions sometimes goes beyond that expected in high school. To be awarded credit for Chemistry 5, a student must score at least 65% on the Chemistry Placement tes ...
... depth of answer that is expected. You should not be surprised to find that the depth of understanding expected in your answers to these questions sometimes goes beyond that expected in high school. To be awarded credit for Chemistry 5, a student must score at least 65% on the Chemistry Placement tes ...
Chemistry Worksheets
... 1) A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density? 2) Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of mercury. 3) What is the w ...
... 1) A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density? 2) Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of mercury. 3) What is the w ...
chem A exercise package C
... would allow both atoms to gain electrons is shown in the diagram on this page. The model proposes that atoms overlap and that each atom put one electron into this overlapping region or into an electron "pool." By doing this, each atom appears to gain an electron within its original boundary. For eve ...
... would allow both atoms to gain electrons is shown in the diagram on this page. The model proposes that atoms overlap and that each atom put one electron into this overlapping region or into an electron "pool." By doing this, each atom appears to gain an electron within its original boundary. For eve ...
Kjeldahl Method for Determination of Nitrogen
... being followed, 15 to 150 ml of condensate should be collected in the receiving flask to ensure complete recovery of nitrogen. Further extension of the distillation times and volumes collected simply results in more water being carried over to the receiving solution. Excess water does not change the ...
... being followed, 15 to 150 ml of condensate should be collected in the receiving flask to ensure complete recovery of nitrogen. Further extension of the distillation times and volumes collected simply results in more water being carried over to the receiving solution. Excess water does not change the ...
Chapter 19 CHEMICAL THERMODYNAMICS 19.1 SPONTANEOUS
... Although there are hydrogen bonds in liquid water, the molecules can more readily move about relative to one another (translation) and tumble around (rotation). During melting, therefore, the number of possible microstates increases and so does the entropy. In water vapor, the molecules are essentia ...
... Although there are hydrogen bonds in liquid water, the molecules can more readily move about relative to one another (translation) and tumble around (rotation). During melting, therefore, the number of possible microstates increases and so does the entropy. In water vapor, the molecules are essentia ...
Equilibrium and Pressure
... Gases consist of billions of tiny particles in constant motion, colliding with each other and the walls of the container. The sum of all these collisions creates pressure on the walls of the container. In theory, any amount of gas can be squeezed into a container if the container is strong enough to ...
... Gases consist of billions of tiny particles in constant motion, colliding with each other and the walls of the container. The sum of all these collisions creates pressure on the walls of the container. In theory, any amount of gas can be squeezed into a container if the container is strong enough to ...
Use the following answers for questions 1
... 30. Hydrogen gas is collected over water at 24 °C. The total pressure of the sample is 755 millimeters of mercury. At 24 °C, the vapor pressure of water is 22 millimeters of mercury. What is the partial pressure of the hydrogen gas? (A) 22 mm Hg (B) 733 mm Hg (C) 755 mm Hg (D) 760 mm Hg (E) 777 mm H ...
... 30. Hydrogen gas is collected over water at 24 °C. The total pressure of the sample is 755 millimeters of mercury. At 24 °C, the vapor pressure of water is 22 millimeters of mercury. What is the partial pressure of the hydrogen gas? (A) 22 mm Hg (B) 733 mm Hg (C) 755 mm Hg (D) 760 mm Hg (E) 777 mm H ...
Lab 3. Chemical Reactions
... as melting, boiling, or stretching do not affect the identity of the substance, just its form. Aluminum, Al, for example, is shiny and malleable (it can be physically stretched into wire, rolled into pellets, or pounded into sheets and foil). It conducts heat and electricity but is not magnetic. It ...
... as melting, boiling, or stretching do not affect the identity of the substance, just its form. Aluminum, Al, for example, is shiny and malleable (it can be physically stretched into wire, rolled into pellets, or pounded into sheets and foil). It conducts heat and electricity but is not magnetic. It ...
Chapter 13
... Our model of the nature of matter has the following components: ♦ All matter is composed of tiny particles. ♦ These particles are in constant motion. The amount of motion is proportional to temperature. Increased temperature means increased motion. ♦ Solids, gases, and liquids differ in the degree o ...
... Our model of the nature of matter has the following components: ♦ All matter is composed of tiny particles. ♦ These particles are in constant motion. The amount of motion is proportional to temperature. Increased temperature means increased motion. ♦ Solids, gases, and liquids differ in the degree o ...
Reaction Stoichiometry
... Carbon reacts with steam to produce hydrogen and carbon monoxide. If 2.40 mol of carbon are exposed to 3.10 mol of steam, identify the limiting reactant. How many moles of each product are formed? What mass of each product is formed? ...
... Carbon reacts with steam to produce hydrogen and carbon monoxide. If 2.40 mol of carbon are exposed to 3.10 mol of steam, identify the limiting reactant. How many moles of each product are formed? What mass of each product is formed? ...
Lab Manual Yr 1 organic
... Safety is the primary concern in any chemical laboratory. Chemicals, particularly organic chemicals, are almost all potentially hazardous. Fortunately, with sensible and correct precautions, the risks can be minimized if certain basic safety practices are followed. The responsibility for laboratory ...
... Safety is the primary concern in any chemical laboratory. Chemicals, particularly organic chemicals, are almost all potentially hazardous. Fortunately, with sensible and correct precautions, the risks can be minimized if certain basic safety practices are followed. The responsibility for laboratory ...
General Equilibrium FR worksheet
... (d) If the volume of the original reaction is decreased at constant temperature to half the original volume, what will happen to the number of moles of Cl2 in the reaction vessel? Explain. ...
... (d) If the volume of the original reaction is decreased at constant temperature to half the original volume, what will happen to the number of moles of Cl2 in the reaction vessel? Explain. ...
1994 Released Exam
... Directions: Each set of letteredchoicesbelow refers to the numberedquestionsor statementsimmediately following it. Select the one letteredchoice that bestanswerseach questionor bestfits each statementand then fill in the correspondingoval on the answersheet.A choice may be used once, more than once, ...
... Directions: Each set of letteredchoicesbelow refers to the numberedquestionsor statementsimmediately following it. Select the one letteredchoice that bestanswerseach questionor bestfits each statementand then fill in the correspondingoval on the answersheet.A choice may be used once, more than once, ...
Hydrogen Sulfide in Nitrogen 0.0001% to 5.0%
... Hazardous combustion products: Sulfur dioxide, irritants, toxic gases Sensitivity to mechanical shock: No data Sensitivity to static discharge: No data * Concentrations of H2S ≤ 6.7% in nitrogen are non-flammable (CGA P-23). Fire and Explosion Hazards: The majority of this product constitutes a nonf ...
... Hazardous combustion products: Sulfur dioxide, irritants, toxic gases Sensitivity to mechanical shock: No data Sensitivity to static discharge: No data * Concentrations of H2S ≤ 6.7% in nitrogen are non-flammable (CGA P-23). Fire and Explosion Hazards: The majority of this product constitutes a nonf ...
2010
... Other than temperature change, state one other observation that was made when the most reactive metal was added to the copper(II) sulphate solution. (1 mark) ...
... Other than temperature change, state one other observation that was made when the most reactive metal was added to the copper(II) sulphate solution. (1 mark) ...
Preparation and Properties of Hydrogen
... hydrogen will float. Because of the hydrogen molecule's small size, it will diffuse through many substances. Hydrogen gas is extremely flammable and will react with oxygen to form water with a release of a great deal of heat. The Hindenburg Zeppelin was destroyed in 1937 because of this reaction. He ...
... hydrogen will float. Because of the hydrogen molecule's small size, it will diffuse through many substances. Hydrogen gas is extremely flammable and will react with oxygen to form water with a release of a great deal of heat. The Hindenburg Zeppelin was destroyed in 1937 because of this reaction. He ...
Page 1
... 58. Compare alpha, beta and gamma particles. Alpha: a particle with twp protons and two neutrons, with a 2+ charge; is equivalent to a helium -4 nucleus, can be represented by x, and is emitted during radioactive decay. Beta: a high-speed electron with a 1- charge that is emitted during radioactive ...
... 58. Compare alpha, beta and gamma particles. Alpha: a particle with twp protons and two neutrons, with a 2+ charge; is equivalent to a helium -4 nucleus, can be represented by x, and is emitted during radioactive decay. Beta: a high-speed electron with a 1- charge that is emitted during radioactive ...
chapter i states of matter - myweb
... throughout. The components of homogeneous and heterogeneous mixtures can be separated and recovered as pure substances by means of physical methods. However, in the case of homogenous mixtures one has to be very careful with the recovery of pure solid substances. Consider for example the case of a s ...
... throughout. The components of homogeneous and heterogeneous mixtures can be separated and recovered as pure substances by means of physical methods. However, in the case of homogenous mixtures one has to be very careful with the recovery of pure solid substances. Consider for example the case of a s ...
Test 8 Review
... energy change (ΔG) predicts whether or not a reaction is spontaneous. It is the difference between the energy change (ΔH) and the product of the absolute or Kelvin temperature (T) and the entropy change (ΔS). Reaction rates. The speed of chemical reactions depends on several factors: [1] Nature of r ...
... energy change (ΔG) predicts whether or not a reaction is spontaneous. It is the difference between the energy change (ΔH) and the product of the absolute or Kelvin temperature (T) and the entropy change (ΔS). Reaction rates. The speed of chemical reactions depends on several factors: [1] Nature of r ...
Chemistry 211 - George Mason University
... • Physical: properties that can be measured without changing the chemical composition of the substance – E.g. melting point, smell, density. • Chemical: properties that described a substance’s reactivity. E.g. Alkali metals react to form positively charge substances; halogens form negatively charged ...
... • Physical: properties that can be measured without changing the chemical composition of the substance – E.g. melting point, smell, density. • Chemical: properties that described a substance’s reactivity. E.g. Alkali metals react to form positively charge substances; halogens form negatively charged ...
Combustion and Flue Gas Analysis
... LPG ( Liquid Propane Gas ) is manufactured from Petroleum and usually supplied in pressurized steel bottles ( cooking is a typical application ). Gaseous fuels include also Coke oven gas and Blast furnace gas. December 2006 ...
... LPG ( Liquid Propane Gas ) is manufactured from Petroleum and usually supplied in pressurized steel bottles ( cooking is a typical application ). Gaseous fuels include also Coke oven gas and Blast furnace gas. December 2006 ...
analisis farmasi analisis farmasi anorganik -
... The ability of an aqueous solution to resist changes in pH upon the The ability of an aqueous solution to resist changes in pH upon the addition of acid or base is termed the buffering capability of the solution. The ability of a natural water body to resist a decrease in pH is very important due ...
... The ability of an aqueous solution to resist changes in pH upon the The ability of an aqueous solution to resist changes in pH upon the addition of acid or base is termed the buffering capability of the solution. The ability of a natural water body to resist a decrease in pH is very important due ...
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.