Document
... Check: because the solution is diluted by a factor of 5, the volume should increase by a factor of 5, and it does ...
... Check: because the solution is diluted by a factor of 5, the volume should increase by a factor of 5, and it does ...
Chemistry - cloudfront.net
... 34. given a molecular formula, be able to determine the molecular shape for a molecule or ion [you will have your molecular shape sheet] 35. given a Lewis structure, be able to compute the formal charge for an atom 36. know which elements are found in nature as diatomic molecules (e.g., H2) 37. give ...
... 34. given a molecular formula, be able to determine the molecular shape for a molecule or ion [you will have your molecular shape sheet] 35. given a Lewis structure, be able to compute the formal charge for an atom 36. know which elements are found in nature as diatomic molecules (e.g., H2) 37. give ...
Sample Exercise 3.1 Interpreting and Balancing Chemical Equations
... Analyze We are given amounts of different substances expressed in grams, moles, and number of molecules and asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert g 12C, 1 mol C2H2, and 9 × 1023 molecules CO2 al ...
... Analyze We are given amounts of different substances expressed in grams, moles, and number of molecules and asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert g 12C, 1 mol C2H2, and 9 × 1023 molecules CO2 al ...
Chapter 5 of Zumdahl
... If 0.00251 mol of NH3 effuse through a hole in 2.47 min, how much HCl would effuse in the same time? A sample of N2 effuses through a hole in 38 seconds. what must be the molecular weight of gas that effuses in ...
... If 0.00251 mol of NH3 effuse through a hole in 2.47 min, how much HCl would effuse in the same time? A sample of N2 effuses through a hole in 38 seconds. what must be the molecular weight of gas that effuses in ...
Chemistry I Syllabus 2011-2012
... Essential Questions: 1. What specific properties of materials allow them to be classified as metals or nonmetals? 2. How is the relative mass of atoms determined? What does that indicate about the way in which they react? 3. What evidence is there for the existence of electrons and the nucleus? 4. H ...
... Essential Questions: 1. What specific properties of materials allow them to be classified as metals or nonmetals? 2. How is the relative mass of atoms determined? What does that indicate about the way in which they react? 3. What evidence is there for the existence of electrons and the nucleus? 4. H ...
AP Chemistry: Course Introduction Sheet
... The mass of the atom is due to the _____________________________ The size of the atom is due to the __________________ How Many Particles in Each Atom? The particle that defines the identity of an atom is the _____________ Every hydrogen atom has ___ proton. Every magnesium atom has ___ protons. Any ...
... The mass of the atom is due to the _____________________________ The size of the atom is due to the __________________ How Many Particles in Each Atom? The particle that defines the identity of an atom is the _____________ Every hydrogen atom has ___ proton. Every magnesium atom has ___ protons. Any ...
Semester 1 exam review
... 10. My rubber duckey in bath water (30 degrees C.) holds 15 cm3 of air. When the bath water turns cold (21 degrees C.) how much air will my rubber duckey hold? Assume that I put a cork in my duckey when it was in the warm water. 11. You are filling paintball cartridges to make your paintball gun sho ...
... 10. My rubber duckey in bath water (30 degrees C.) holds 15 cm3 of air. When the bath water turns cold (21 degrees C.) how much air will my rubber duckey hold? Assume that I put a cork in my duckey when it was in the warm water. 11. You are filling paintball cartridges to make your paintball gun sho ...
Slide 1
... Analyze We are given amounts of different substances expressed in grams, moles, and number of molecules and asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert g 12C, 1 mol C2H2, and 9 1023 molecules CO2 al ...
... Analyze We are given amounts of different substances expressed in grams, moles, and number of molecules and asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert g 12C, 1 mol C2H2, and 9 1023 molecules CO2 al ...
Subject Materials for Chemistry
... d) Effect of Temperature: The rate of the reaction increases with increase of temperature. Perishable foods like milk, cooked vegetables go bad much more rapidly in summer than in winter. In the case of enzyme catalyzed reaction rate of reaction increases with in creases of temperature at first up t ...
... d) Effect of Temperature: The rate of the reaction increases with increase of temperature. Perishable foods like milk, cooked vegetables go bad much more rapidly in summer than in winter. In the case of enzyme catalyzed reaction rate of reaction increases with in creases of temperature at first up t ...
1411FINALSAMPLE+KEY - Houston Community College
... overall geometry is tetrahedral and the molecular geometry is trigonal pyramidal. The hybridization of the sulfur atom in the first structure is therefore sp3. However, the sulfur is not simply sp3 hybridized in the second structure, which has an “expanded octet” around the sulfur atom. Hybridizatio ...
... overall geometry is tetrahedral and the molecular geometry is trigonal pyramidal. The hybridization of the sulfur atom in the first structure is therefore sp3. However, the sulfur is not simply sp3 hybridized in the second structure, which has an “expanded octet” around the sulfur atom. Hybridizatio ...
Chapter 11 * Chemical Reactions
... General Equation: Na2SO4 (aq) + Ba(NO3)2 (aq 2NaNO3 (aq) + BaSO4 (s) Ionic Equation: 2Na+1 (aq) + SO4-2 (aq) + Ba+2 (aq) + 2NO3-1 (aq) 2Na+1 (aq) + 2 NO3-1 (aq) + BaSO4 (s) Net Ionic Equation: Ba+2 (aq) + SO4-2 (aq) BaSO4 (s) ...
... General Equation: Na2SO4 (aq) + Ba(NO3)2 (aq 2NaNO3 (aq) + BaSO4 (s) Ionic Equation: 2Na+1 (aq) + SO4-2 (aq) + Ba+2 (aq) + 2NO3-1 (aq) 2Na+1 (aq) + 2 NO3-1 (aq) + BaSO4 (s) Net Ionic Equation: Ba+2 (aq) + SO4-2 (aq) BaSO4 (s) ...
1994 AP Chemistry Multiple Choice
... 37. A sample of 3.30 grams of an ideal gas at 150.0_C and 1.25 atmospheres pressure has a volume of 2.00 liters. What is the molar mass of the gas? The gas constant, R, is 0.0821 (L.atm)/(mol.K). (A) 0.0218 gram/mole (B) 16.2 grams/mole (C) 37.0 grams/mole (D) 45.8 grams/mole (E) 71.6 grams/mole 38 ...
... 37. A sample of 3.30 grams of an ideal gas at 150.0_C and 1.25 atmospheres pressure has a volume of 2.00 liters. What is the molar mass of the gas? The gas constant, R, is 0.0821 (L.atm)/(mol.K). (A) 0.0218 gram/mole (B) 16.2 grams/mole (C) 37.0 grams/mole (D) 45.8 grams/mole (E) 71.6 grams/mole 38 ...
CHEM-1411 Final Practice Exam
... overall geometry is tetrahedral and the molecular geometry is trigonal pyramidal. The hybridization of the sulfur atom in the first structure is therefore sp3. However, the sulfur is not simply sp3 hybridized in the second structure, which has an “expanded octet” around the sulfur atom. Hybridizatio ...
... overall geometry is tetrahedral and the molecular geometry is trigonal pyramidal. The hybridization of the sulfur atom in the first structure is therefore sp3. However, the sulfur is not simply sp3 hybridized in the second structure, which has an “expanded octet” around the sulfur atom. Hybridizatio ...
June review January 2012 part A
... 35 Which Lewis electron-dot diagram represents a molecule having a nonpolar covalent bond? (Items 96, 97 of 200 ways..) Remember molecules have covalent bonds; Bond polarity increases as the difference in electronegativity between the bonded atoms increases; Bonds between identical atoms will be no ...
... 35 Which Lewis electron-dot diagram represents a molecule having a nonpolar covalent bond? (Items 96, 97 of 200 ways..) Remember molecules have covalent bonds; Bond polarity increases as the difference in electronegativity between the bonded atoms increases; Bonds between identical atoms will be no ...
Final Exam - Dawson College
... on the linear form of the Arrhenius equation is obtained. Arrhenius plot for the determination of the activation energy for the reaction of iodide with peroxydisulfate ...
... on the linear form of the Arrhenius equation is obtained. Arrhenius plot for the determination of the activation energy for the reaction of iodide with peroxydisulfate ...
Stoichiometry
Stoichiometry /ˌstɔɪkiˈɒmɨtri/ is the calculation of relative quantities of reactants and products in chemical reactions.Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of product can be empirically determined, then the amount of the other reactants can also be calculated.As seen in the image to the right, where the balanced equation is:CH4 + 2 O2 → CO2 + 2 H2O.Here, one molecule of methane reacts with two molecules of oxygen gas to yield one molecule of carbon dioxide and two molecules of water. Stoichiometry measures these quantitative relationships, and is used to determine the amount of products/reactants that are produced/needed in a given reaction. Describing the quantitative relationships among substances as they participate in chemical reactions is known as reaction stoichiometry. In the example above, reaction stoichiometry measures the relationship between the methane and oxygen as they react to form carbon dioxide and water.Because of the well known relationship of moles to atomic weights, the ratios that are arrived at by stoichiometry can be used to determine quantities by weight in a reaction described by a balanced equation. This is called composition stoichiometry.Gas stoichiometry deals with reactions involving gases, where the gases are at a known temperature, pressure, and volume and can be assumed to be ideal gases. For gases, the volume ratio is ideally the same by the ideal gas law, but the mass ratio of a single reaction has to be calculated from the molecular masses of the reactants and products. In practice, due to the existence of isotopes, molar masses are used instead when calculating the mass ratio.