handout 4
... A sample of CH4(g) having a volume of 2.80 Liters at 25°C and 1.65 atm, was ignited with a sample of oxygen gas having a volume of 35.0 Liters at 31°C and 1.25 atm to produce CO2 and H2O vapor. Calculate the volume of CO2 formed at a pressure of 2.50 atm and a temperature of 125°C. ...
... A sample of CH4(g) having a volume of 2.80 Liters at 25°C and 1.65 atm, was ignited with a sample of oxygen gas having a volume of 35.0 Liters at 31°C and 1.25 atm to produce CO2 and H2O vapor. Calculate the volume of CO2 formed at a pressure of 2.50 atm and a temperature of 125°C. ...
Homework,1 Atoms, molecules, and ions
... 8- Which of the following quantities ( heat, work, enthalpy, internal energy) depend only on the end points and not on the path followed in a process? a) heat b) work c) enthalpy and internal energy d) enthalpy e) internal energy 9- When 0.215 mol NH3 is formed from nitrogen and hydrogen, 9.91 kJ of ...
... 8- Which of the following quantities ( heat, work, enthalpy, internal energy) depend only on the end points and not on the path followed in a process? a) heat b) work c) enthalpy and internal energy d) enthalpy e) internal energy 9- When 0.215 mol NH3 is formed from nitrogen and hydrogen, 9.91 kJ of ...
2012 C13 Exam answers
... 32 Which statement about catalysts is incorrect? 28 A cylinder of unknown volume contains helium gas, He(g), at 3.50 atm and 315 K. The helium gas is then transferred to a 7.0 L gas cylinder containing Ne(g), at 2.50 atm and 315 K. If the final total pressure at 315 K is 5.75 atm, then what is the v ...
... 32 Which statement about catalysts is incorrect? 28 A cylinder of unknown volume contains helium gas, He(g), at 3.50 atm and 315 K. The helium gas is then transferred to a 7.0 L gas cylinder containing Ne(g), at 2.50 atm and 315 K. If the final total pressure at 315 K is 5.75 atm, then what is the v ...
Ch 8 Lecture Notes
... Barium sulfate is used to enhance Xray imaging of the upper and lower GI tract. In upper GI imaging, patients drink a suspension of solid barium sulfate in H 2O. The compound is not toxic because of its limited solubility. To make pure barium sulfate, a precipitation reaction is employed: aqueous so ...
... Barium sulfate is used to enhance Xray imaging of the upper and lower GI tract. In upper GI imaging, patients drink a suspension of solid barium sulfate in H 2O. The compound is not toxic because of its limited solubility. To make pure barium sulfate, a precipitation reaction is employed: aqueous so ...
Answers - U of L Class Index
... You’re given two vials, each containing a solid sample of metal. You’re told that one vial contains lithium and the other contains potassium. How do you determine which metal is which? Briefly, explain how your method will tell you which is which. Method A: Potassium reacts violently with water; lit ...
... You’re given two vials, each containing a solid sample of metal. You’re told that one vial contains lithium and the other contains potassium. How do you determine which metal is which? Briefly, explain how your method will tell you which is which. Method A: Potassium reacts violently with water; lit ...
2012 Chem 13 News Exam
... 32 Which statement about catalysts is incorrect? 28 A cylinder of unknown volume contains helium gas, He(g), at 3.50 atm and 315 K. The helium gas is then transferred to a 7.0 L gas cylinder containing Ne(g), at 2.50 atm and 315 K. If the final total pressure at 315 K is 5.75 atm, then what is the v ...
... 32 Which statement about catalysts is incorrect? 28 A cylinder of unknown volume contains helium gas, He(g), at 3.50 atm and 315 K. The helium gas is then transferred to a 7.0 L gas cylinder containing Ne(g), at 2.50 atm and 315 K. If the final total pressure at 315 K is 5.75 atm, then what is the v ...
Name __KEY____________ Per. ______ Polarity and
... When examining trends in the periodic table, as we move towards the top-right the elements have a greater _electronegativity_ (atomic radius/ electronegativity), which is a measure of how much they want to _ hold onto_ (hold onto/ let go of) their electrons. For any two elements that share a chemica ...
... When examining trends in the periodic table, as we move towards the top-right the elements have a greater _electronegativity_ (atomic radius/ electronegativity), which is a measure of how much they want to _ hold onto_ (hold onto/ let go of) their electrons. For any two elements that share a chemica ...
Addition of ketene to ethylene oxide
... intermediate in the preparation of surface active agents • . This involves a reaction with long chain carboxylic acids to produce a molecule containing both hydrophobic and hydrophilic characteristics. Ethylene oxide undergoes attack by substances containing active hydrogen and also by some substanc ...
... intermediate in the preparation of surface active agents • . This involves a reaction with long chain carboxylic acids to produce a molecule containing both hydrophobic and hydrophilic characteristics. Ethylene oxide undergoes attack by substances containing active hydrogen and also by some substanc ...
Chem Stoichiometry Study Guide
... BALANCED EQUATIONS 1. 4 Al + 3 O2 2 Al2O3 2. Cu + 2 AgNO3 2 Ag + Cu(NO3) 2 3. Zn + 2 HCl ZnCl2 + H2 4. 2 Fe + 3 Cl2 2 FeCl3 ...
... BALANCED EQUATIONS 1. 4 Al + 3 O2 2 Al2O3 2. Cu + 2 AgNO3 2 Ag + Cu(NO3) 2 3. Zn + 2 HCl ZnCl2 + H2 4. 2 Fe + 3 Cl2 2 FeCl3 ...
GCE Chemistry Question Paper Unit 04 - Kinetics, Equilibria
... Calculate the amounts, in moles, of hydrogen and of iodine in the equilibrium mixture. Moles of hydrogen ............................................................................................................. Moles of iodine ..................................................................... ...
... Calculate the amounts, in moles, of hydrogen and of iodine in the equilibrium mixture. Moles of hydrogen ............................................................................................................. Moles of iodine ..................................................................... ...
X1-1 - murov.info
... 1. How many protons, neutrons and electrons are in a.* F b. Al c. Mn d. Au 2. How many protons, neutrons and electrons are in a.* Cl b. Cu 3. How many protons, neutrons and electrons are in a.* H b. C c. N d. O e. Br 4. How many protons, neutrons and electrons are in a.* Cu2+ b. Cl5. Except for smal ...
... 1. How many protons, neutrons and electrons are in a.* F b. Al c. Mn d. Au 2. How many protons, neutrons and electrons are in a.* Cl b. Cu 3. How many protons, neutrons and electrons are in a.* H b. C c. N d. O e. Br 4. How many protons, neutrons and electrons are in a.* Cu2+ b. Cl5. Except for smal ...
Liquid–liquid extraction
Liquid–liquid extraction (LLE) consists in transferring one (or more) solute(s) contained in a feed solution to another immiscible liquid (solvent). The solvent that is enriched in solute(s) is called extract. The feed solution that is depleted in solute(s) is called raffinate.Liquid–liquid extraction also known as solvent extraction and partitioning, is a method to separate compounds based on their relative solubilities in two different immiscible liquids, usually water and an organic solvent. It is an extraction of a substance from one liquid into another liquid phase. Liquid–liquid extraction is a basic technique in chemical laboratories, where it is performed using a variety of apparatus, from separatory funnels to countercurrent distribution equipment. This type of process is commonly performed after a chemical reaction as part of the work-up.The term partitioning is commonly used to refer to the underlying chemical and physical processes involved in liquid–liquid extraction, but on another reading may be fully synonymous with it. The term solvent extraction can also refer to the separation of a substance from a mixture by preferentially dissolving that substance in a suitable solvent. In that case, a soluble compound is separated from an insoluble compound or a complex matrix.Solvent extraction is used in nuclear reprocessing, ore processing, the production of fine organic compounds, the processing of perfumes, the production of vegetable oils and biodiesel, and other industries.Liquid–liquid extraction is possible in non-aqueous systems: In a system consisting of a molten metal in contact with molten salts, metals can be extracted from one phase to the other. This is related to a mercury electrode where a metal can be reduced, the metal will often then dissolve in the mercury to form an amalgam that modifies its electrochemistry greatly. For example, it is possible for sodium cations to be reduced at a mercury cathode to form sodium amalgam, while at an inert electrode (such as platinum) the sodium cations are not reduced. Instead, water is reduced to hydrogen. A detergent or fine solid can be used to stabilize an emulsion, or third phase.