Higher Chemistry - Mobile Resource
... used up or how fast a product is formed. This could involve measuring: a. the rate of mass loss or increase in volume if a gas is a product. b. a change in pH if, for example, an acid is being neutralised. c. the rate at which a colour develops or disappears – this is done using an instrument called ...
... used up or how fast a product is formed. This could involve measuring: a. the rate of mass loss or increase in volume if a gas is a product. b. a change in pH if, for example, an acid is being neutralised. c. the rate at which a colour develops or disappears – this is done using an instrument called ...
The secondary structure of guide RNA molecules
... T.brucei (8,14) with primary sequences as shown in Figure 1A. The molecules vary in length between 64 and 79 nt (including 9 or 10 vector derived bases at their 5' ends) and are predicted to fold into minima] free energy structures (Fig. 1B) with stabilities in the range of -4.4 to -8.2 kcal/mol (at ...
... T.brucei (8,14) with primary sequences as shown in Figure 1A. The molecules vary in length between 64 and 79 nt (including 9 or 10 vector derived bases at their 5' ends) and are predicted to fold into minima] free energy structures (Fig. 1B) with stabilities in the range of -4.4 to -8.2 kcal/mol (at ...
Chem 11 Notes Booklet (pdf version)
... Ionic compounds are created when one kind of positive cation joins with one kind of negative anion. The positive ion is always written first. The sum of the ionic charges in the formula must be zero. This is done by adjusting the numbers of each ion. Li+ + O2- Li2O ...
... Ionic compounds are created when one kind of positive cation joins with one kind of negative anion. The positive ion is always written first. The sum of the ionic charges in the formula must be zero. This is done by adjusting the numbers of each ion. Li+ + O2- Li2O ...
Chapter 17: Molecular Interactions
... Chapter 17: Molecular Interactions quantum oscillation, the modification of the scattering in the forward direction by interference between the wavefunctions of a particle along two different paths. rainbow scattering, strongly enhanced scattering in a nonforward direction. rainbow angle, θr, ...
... Chapter 17: Molecular Interactions quantum oscillation, the modification of the scattering in the forward direction by interference between the wavefunctions of a particle along two different paths. rainbow scattering, strongly enhanced scattering in a nonforward direction. rainbow angle, θr, ...
Supramolecular Assemblies Built from Lanthanide
... but for one cation being present at each portal and the replacement of the included β-al ligand by a nitrate ion,8d while the others involve the Ce, Pr, Yb and Lu cations with additional perrhenate ligands.8k The average Ce–O(carbonyl) bond length in the latter cases, 2.57(10) Å, matches the average ...
... but for one cation being present at each portal and the replacement of the included β-al ligand by a nitrate ion,8d while the others involve the Ce, Pr, Yb and Lu cations with additional perrhenate ligands.8k The average Ce–O(carbonyl) bond length in the latter cases, 2.57(10) Å, matches the average ...
States of Matter
... random, there is a certain amount of short-range order: the presence of one molecule at a given spot means that the neighboring molecules must be at least as far away as the sum of the two radii, and this in turn affects the possible locations of more distant concentric shells of molecules. An import ...
... random, there is a certain amount of short-range order: the presence of one molecule at a given spot means that the neighboring molecules must be at least as far away as the sum of the two radii, and this in turn affects the possible locations of more distant concentric shells of molecules. An import ...
The prebiotic molecules observed in the interstellar gas
... observational evidence exists: objects about 0.4 mm in size with the order of 1010 atoms. A crucial question then is how far the specific structures, which characterize all the known molecules, extend up the population of grains, objects whose structures are almost entirely unknown. The availability ...
... observational evidence exists: objects about 0.4 mm in size with the order of 1010 atoms. A crucial question then is how far the specific structures, which characterize all the known molecules, extend up the population of grains, objects whose structures are almost entirely unknown. The availability ...
Intermolecular forces and molecules
... boiling point. Do electronegativity differences account for this difference? Due to the molecule geometry, the bond dipoles in each cancel. In this case, differences in molar mass (polarizability) account for the variation in boiling point. Having noted that molar mass affects van der Waals forces, ...
... boiling point. Do electronegativity differences account for this difference? Due to the molecule geometry, the bond dipoles in each cancel. In this case, differences in molar mass (polarizability) account for the variation in boiling point. Having noted that molar mass affects van der Waals forces, ...
Chapter 19 CHEMICAL THERMODYNAMICS 19.1 SPONTANEOUS
... energy in the form of vibrational motion about their lattice positions. This means that the degrees of freedom and the entropy both increase. Entropy Changes in Chemical Reactions According to the third law of thermodynamics, the entropy of a pure crystalline solid at 0 K is zero. The entropy increa ...
... energy in the form of vibrational motion about their lattice positions. This means that the degrees of freedom and the entropy both increase. Entropy Changes in Chemical Reactions According to the third law of thermodynamics, the entropy of a pure crystalline solid at 0 K is zero. The entropy increa ...
Cofacial Dicobalt Complex of a Binucleating Hexacarboxamide Cryptand Ligand DOI: 10.1021/ic100395a
... compound in solution, an indication of rigidity of the C3hsymmetric molecular framework on the NMR time scale. NMR studies also reveal the stability of 3 to water: overnight agitation in the presence of 14 equiv of water in a deuterated dimethyl sulfoxide (DMSO-d6) solution indicated no decompositio ...
... compound in solution, an indication of rigidity of the C3hsymmetric molecular framework on the NMR time scale. NMR studies also reveal the stability of 3 to water: overnight agitation in the presence of 14 equiv of water in a deuterated dimethyl sulfoxide (DMSO-d6) solution indicated no decompositio ...
STOICHIOMETRY:
... The word stoichiometry derives from two Greek words: stoicheion (meaning "element") and metron (meaning "measure"). Stoichiometry deals with calculations about the masses, volumes or concentrations of reactants and products involved in a chemical reaction. The reason we balance chemical reactions is ...
... The word stoichiometry derives from two Greek words: stoicheion (meaning "element") and metron (meaning "measure"). Stoichiometry deals with calculations about the masses, volumes or concentrations of reactants and products involved in a chemical reaction. The reason we balance chemical reactions is ...
Stoichiometry: Calculations with Chemical Formulas and Equations
... • A formula weight is the sum of the atomic weights for the atoms in a chemical formula. • This is the quantitative significance of a formula. • The formula weight of calcium chloride, CaCl2, would be Ca: 1(40.08 amu) + Cl: 2(35.453 amu) 110.99 amu Stoichiometry © 2015 Pearson Education ...
... • A formula weight is the sum of the atomic weights for the atoms in a chemical formula. • This is the quantitative significance of a formula. • The formula weight of calcium chloride, CaCl2, would be Ca: 1(40.08 amu) + Cl: 2(35.453 amu) 110.99 amu Stoichiometry © 2015 Pearson Education ...
Combined EPR and Molecular Modeling Study of PPI Dendrimers
... (for example, 16 over 32 terminal groups in PPI-G4) are Cu-bound when the maximal amount of Cu is bound to PPI. • The binding of Cu with PPI-Gn does not change significantly with generation n. This information is almost consistent with the expectation of PPI dendrimers as Cu sponges, with many almost ...
... (for example, 16 over 32 terminal groups in PPI-G4) are Cu-bound when the maximal amount of Cu is bound to PPI. • The binding of Cu with PPI-Gn does not change significantly with generation n. This information is almost consistent with the expectation of PPI dendrimers as Cu sponges, with many almost ...
Answers to For Review Questions from the Textbook
... A limiting reactant problem gives you initial masses of at least two of the reactants and then asks for the amount of product that can form. Because one doesn’t know which reactant runs out first and hence determines the mass of product formed, this is a more difficult problem. The first step in sol ...
... A limiting reactant problem gives you initial masses of at least two of the reactants and then asks for the amount of product that can form. Because one doesn’t know which reactant runs out first and hence determines the mass of product formed, this is a more difficult problem. The first step in sol ...
The enthalpy change
... o The rate of the forward reaction is greater o The rate of the reverse reaction is greater o The rates of the forwards and reverse reactions are equal 2 In the Contact Process, sulfur dioxide is converted into sulfur trioxide and the following equilibrium is set up: If sulfur dioxide is added to th ...
... o The rate of the forward reaction is greater o The rate of the reverse reaction is greater o The rates of the forwards and reverse reactions are equal 2 In the Contact Process, sulfur dioxide is converted into sulfur trioxide and the following equilibrium is set up: If sulfur dioxide is added to th ...
Chapter 3 Chemical Reactions and Reaction Stoichiometry
... Begin by counting each kind of atom on the two sides of the arrow. There are one Na, one O, and two H on the left side, and one Na, one O, and three H on the right. The Na and O atoms are balanced, but the number of H atoms is not. To increase the number of H atoms on the left, let’s try placing the ...
... Begin by counting each kind of atom on the two sides of the arrow. There are one Na, one O, and two H on the left side, and one Na, one O, and three H on the right. The Na and O atoms are balanced, but the number of H atoms is not. To increase the number of H atoms on the left, let’s try placing the ...
Introductary topics
... Hydrated compounds physically trap water molecules as part of their structure. A prefix is used to indicate the relative number of water molecules present with the word hydrate added after the compound’s name. ...
... Hydrated compounds physically trap water molecules as part of their structure. A prefix is used to indicate the relative number of water molecules present with the word hydrate added after the compound’s name. ...
Document
... Stoichiometry: Calculations with Chemical Formulas and Equations Text: Sections E, F, and H ...
... Stoichiometry: Calculations with Chemical Formulas and Equations Text: Sections E, F, and H ...
Stoichiometry, % Comp, Empirical & Molecular Formula
... HCl(aq). How many grams of H2(g) are produced? (Hint: the density of Al is 2.7g/cm3) How many grams of each reactant are needed to produce 15g of iron from the following reaction? Fe2O3 (s) + Al (s) Fe (s) + Al2O3 (s) ...
... HCl(aq). How many grams of H2(g) are produced? (Hint: the density of Al is 2.7g/cm3) How many grams of each reactant are needed to produce 15g of iron from the following reaction? Fe2O3 (s) + Al (s) Fe (s) + Al2O3 (s) ...
AP Chemistry - luckyscience
... Hydrated compounds physically trap water molecules as part of their structure. A prefix is used to indicate the relative number of water molecules present with the word hydrate added after the compound’s name. ...
... Hydrated compounds physically trap water molecules as part of their structure. A prefix is used to indicate the relative number of water molecules present with the word hydrate added after the compound’s name. ...
Chapter 10 - Chemical Quantities
... given that it has a gram molecular mass of 30.0 g/mol? Ans: C2H6 24. A compound is known to have a gram molecular mass of 391.5 g/mol. Find the empirical and the molecular formulas of the compound, given the results of an analysis of a 310.8-g sample that reveals that the sample contains only boron ...
... given that it has a gram molecular mass of 30.0 g/mol? Ans: C2H6 24. A compound is known to have a gram molecular mass of 391.5 g/mol. Find the empirical and the molecular formulas of the compound, given the results of an analysis of a 310.8-g sample that reveals that the sample contains only boron ...
AP Chemistry Standards and Benchmarks
... These descriptive facts, including chemistry involved in environmental and societal issues, should not be isolated form the principles being studied but should be taught throughout the course to illustrate and illuminate the principles. The following areas should be covered: • chemical reactivity an ...
... These descriptive facts, including chemistry involved in environmental and societal issues, should not be isolated form the principles being studied but should be taught throughout the course to illustrate and illuminate the principles. The following areas should be covered: • chemical reactivity an ...
Host–guest chemistry
In supramolecular chemistry, host–guest chemistry describes complexes that are composed of two or more molecules or ions that are held together in unique structural relationships by forces other than those of full covalent bonds. Host–guest chemistry encompasses the idea of molecular recognition and interactions through noncovalent bonding. Noncovalent bonding is critical in maintaining the 3D structure of large molecules, such as proteins and is involved in many biological processes in which large molecules bind specifically but transiently to one another. There are four commonly mentioned types of non-covalent interactions: hydrogen bonds, ionic bonds, van der Waals forces, and hydrophobic interactions.