educator exam series
... Mathematical tables and electronic calculations may be used All working MUST be clearly shown where necessary For examiner’s use only: Questions Max. score Candidates score ...
... Mathematical tables and electronic calculations may be used All working MUST be clearly shown where necessary For examiner’s use only: Questions Max. score Candidates score ...
Model Description Sheet
... The development of clean and renewable energy is critical to partially address the energy crisis and climate issues. Inspired by nature, artificial photosynthesis through water splitting by solar energy conversion is the most attractive approach for the development. The overall water splitting inclu ...
... The development of clean and renewable energy is critical to partially address the energy crisis and climate issues. Inspired by nature, artificial photosynthesis through water splitting by solar energy conversion is the most attractive approach for the development. The overall water splitting inclu ...
Text Related to Segment 7.01 ©2002 Claude E. Wintner To make a
... vibrational potential energy vs. nuclear separation, and used as a model for bond strength vs. nuclear separation ...
... vibrational potential energy vs. nuclear separation, and used as a model for bond strength vs. nuclear separation ...
Study Island Copyright © 2012 Study Island
... A. a pure substance in which the atoms of three or more elements are chemically combined B. a mixture of two or more elements that do not combine chemically C. a mixture of two or more elements that retains the essential properties of each element D. a pure substance in which the atoms of two or mor ...
... A. a pure substance in which the atoms of three or more elements are chemically combined B. a mixture of two or more elements that do not combine chemically C. a mixture of two or more elements that retains the essential properties of each element D. a pure substance in which the atoms of two or mor ...
Chem 1411 Chapt2
... Types of CompoundsIonic- Consists of metals and non-metals (Or in general cations and anions). NaCl, MgCl2, K2S, Na2SO4 Molecular (covalent)- Consists of non-metals only. HCl, N2O4, C3H6O, C6H12O6 Note- All compounds can be molecules; not all molecules can be compounds. Ions- Are chemical species th ...
... Types of CompoundsIonic- Consists of metals and non-metals (Or in general cations and anions). NaCl, MgCl2, K2S, Na2SO4 Molecular (covalent)- Consists of non-metals only. HCl, N2O4, C3H6O, C6H12O6 Note- All compounds can be molecules; not all molecules can be compounds. Ions- Are chemical species th ...
Chapter 6-student notes
... b) Stalactites form in caves when calcium bicarbonate reacts to form calcium carbonate, water and carbon dioxide gas. Can you figure out what is missing in the following chemical reactions? 1. Aluminum resists corrosion (rust) because it reacts with a gas in the air to form a protective coating of a ...
... b) Stalactites form in caves when calcium bicarbonate reacts to form calcium carbonate, water and carbon dioxide gas. Can you figure out what is missing in the following chemical reactions? 1. Aluminum resists corrosion (rust) because it reacts with a gas in the air to form a protective coating of a ...
1. Chlorine will combine with the non
... Sodium chloride, an ionic compound, has a high melting point whereas paraffin wax, a molecular compound, melts easily. Explain why. ...
... Sodium chloride, an ionic compound, has a high melting point whereas paraffin wax, a molecular compound, melts easily. Explain why. ...
Oxidation Number Rules
... oxidation number of zero. Examples: N2, Cl2, C, Sn, S8 2. The oxidation number of a simple, monatomic ion is the same as the charge on the ion. Examples: Na+ is +1, Cu+2 is +2, Cu+ is +1, F¯ is -1. 3. The oxidation numbers of some common atoms are: a. Fluorine, the most electronegative element, is - ...
... oxidation number of zero. Examples: N2, Cl2, C, Sn, S8 2. The oxidation number of a simple, monatomic ion is the same as the charge on the ion. Examples: Na+ is +1, Cu+2 is +2, Cu+ is +1, F¯ is -1. 3. The oxidation numbers of some common atoms are: a. Fluorine, the most electronegative element, is - ...
Isotopes Models
... called Deuterium. Deuterium is not radioactive. Water made from deuterium is called heavy water because the extra neutron makes it heavier. It is used in nuclear reactors. The third isotope of hydrogen is known as Tritium. It has one proton and two neutrons in its nucleus. It is radioactive. It is f ...
... called Deuterium. Deuterium is not radioactive. Water made from deuterium is called heavy water because the extra neutron makes it heavier. It is used in nuclear reactors. The third isotope of hydrogen is known as Tritium. It has one proton and two neutrons in its nucleus. It is radioactive. It is f ...
Chemistry - Solutions
... in sewage treatment plants to create liquid chloroform (CHCl3) and hydrogen chloride gas (HCl). What would a balanced chemical equation look like for this reaction? ...
... in sewage treatment plants to create liquid chloroform (CHCl3) and hydrogen chloride gas (HCl). What would a balanced chemical equation look like for this reaction? ...
NAME
... b) aluminum bromide solution and chlorine gas react to form aluminum chloride and bromine gas. ...
... b) aluminum bromide solution and chlorine gas react to form aluminum chloride and bromine gas. ...
Teacher Demo/Student Activity: Elephant`s Toothpaste
... Ask students to explain their observations. ...
... Ask students to explain their observations. ...
Lab 5
... On the next page is a table of stellar spectra; each “row” represents the emissions from a particular star. The star’s abbreviated name is given to the left of its spectrum; for instance, the first star is “10 Lacerta”, which is the tenth brightest star in the constellation Lacerta. The star’s spec ...
... On the next page is a table of stellar spectra; each “row” represents the emissions from a particular star. The star’s abbreviated name is given to the left of its spectrum; for instance, the first star is “10 Lacerta”, which is the tenth brightest star in the constellation Lacerta. The star’s spec ...
INTERMOLECULAR BONDING - HYDROGEN BONDS The
... The diagram shows the potential hydrogen bonds formed to a chloride ion, Cl-. Although the lone pairs in the chloride ion are at the 3-level and wouldn't normally be active enough to form hydrogen bonds, in this case they are made more attractive by the full negative charge on the chlorine. ...
... The diagram shows the potential hydrogen bonds formed to a chloride ion, Cl-. Although the lone pairs in the chloride ion are at the 3-level and wouldn't normally be active enough to form hydrogen bonds, in this case they are made more attractive by the full negative charge on the chlorine. ...
Hydrogen bonding
... chloride ion, Cl-. Although the lone pairs in the chloride ion are at the 3-level and wouldn't normally be active enough to form hydrogen bonds, in this case they are made more attractive by the full negative charge on the chlorine. ...
... chloride ion, Cl-. Although the lone pairs in the chloride ion are at the 3-level and wouldn't normally be active enough to form hydrogen bonds, in this case they are made more attractive by the full negative charge on the chlorine. ...
ppt Sc10 Review Notes
... to go from name to formula: first part is the same as before …look up the symbol for each ion then balance the charges using subscripts, then for the hydrate part…add “xH2O” where x is the number given in the prefix eg) iron (III) nitrate nonahydrate = Fe(NO3)39H2O sodium chlorate tetrahydrate = ...
... to go from name to formula: first part is the same as before …look up the symbol for each ion then balance the charges using subscripts, then for the hydrate part…add “xH2O” where x is the number given in the prefix eg) iron (III) nitrate nonahydrate = Fe(NO3)39H2O sodium chlorate tetrahydrate = ...
Full Text
... elaborate three-dimensional hydrogen bonded network. The ammonium cation participates in three separate OHîNîHO motifs, one to each of the three crystallographically independent carboxylate C=O functional groups. Each of these motifs is half of the R42(8) synthon as shown in Figure 3 (d[CîH] = ...
... elaborate three-dimensional hydrogen bonded network. The ammonium cation participates in three separate OHîNîHO motifs, one to each of the three crystallographically independent carboxylate C=O functional groups. Each of these motifs is half of the R42(8) synthon as shown in Figure 3 (d[CîH] = ...
Name______________________ Making - Science
... one neutron in its nucleus is called Deuterium. Deuterium is not radioactive. Water made from deuterium is called heavy water because the extra neutron makes it heavier. It is used in nuclear reactors. The third isotope of hydrogen is known as Tritium. It has one proton and two neutrons in its nucle ...
... one neutron in its nucleus is called Deuterium. Deuterium is not radioactive. Water made from deuterium is called heavy water because the extra neutron makes it heavier. It is used in nuclear reactors. The third isotope of hydrogen is known as Tritium. It has one proton and two neutrons in its nucle ...
CfE Higher Chemistry Homework 3.5
... What volume of oxygen (in litres) would be required for the complete combustion of a gaseous mixture containing 1 litre of carbon monoxide and 3 litres of hydrogen? (All volumes are measured at the same temperature and pressure.) ...
... What volume of oxygen (in litres) would be required for the complete combustion of a gaseous mixture containing 1 litre of carbon monoxide and 3 litres of hydrogen? (All volumes are measured at the same temperature and pressure.) ...
A2 Respiration test
... In the third stage of aerobic respiration, the carriers are alternately reduced and ……………………. electrons as they gain and lose …………………………. . Energy is released and used to phosphorylate ADP, forming ………………………. . The hydrogen atoms finally combine with……………………….. to form ATP oxygen ...
... In the third stage of aerobic respiration, the carriers are alternately reduced and ……………………. electrons as they gain and lose …………………………. . Energy is released and used to phosphorylate ADP, forming ………………………. . The hydrogen atoms finally combine with……………………….. to form ATP oxygen ...
All About Isotopes
... All About Isotopes The atomic number of any atom (element) is a whole number and represents the number of protons in the atom, but that’s not true of atomic mass which is not a whole number. Since atomic mass is the number of the protons plus neutrons in the nucleus does that mean the nucleus of ato ...
... All About Isotopes The atomic number of any atom (element) is a whole number and represents the number of protons in the atom, but that’s not true of atomic mass which is not a whole number. Since atomic mass is the number of the protons plus neutrons in the nucleus does that mean the nucleus of ato ...
Distance
... A specific subclass is the -turn, a region of the polypeptide of 4 amino acids (i, i+1, i+2, i+3) having a hydrogen bond from O(i) to N(i+3). -turns can be classified into several subclasses based on the and angles of residues i+1 and i+2. Most common turn types: Type I and Type II. ...
... A specific subclass is the -turn, a region of the polypeptide of 4 amino acids (i, i+1, i+2, i+3) having a hydrogen bond from O(i) to N(i+3). -turns can be classified into several subclasses based on the and angles of residues i+1 and i+2. Most common turn types: Type I and Type II. ...
Atomic Theory - Hutchk12.org
... called electrons means that to get a better picture (model, theory, explanation) of atoms, scientists had to admit that atoms had parts and one of these parts were negative particles called ...
... called electrons means that to get a better picture (model, theory, explanation) of atoms, scientists had to admit that atoms had parts and one of these parts were negative particles called ...
8492_Chemichal Weapons Production Indicators
... The vapors of chlorinated solvents exposed to high temperatures have been known to produce phosgene. Chlorinated solvents are chlorine-containing chemicals that are typically used in industrial processes to dissolve or clean other materials, such as in paint stripping, metal cleaning, and dry cleani ...
... The vapors of chlorinated solvents exposed to high temperatures have been known to produce phosgene. Chlorinated solvents are chlorine-containing chemicals that are typically used in industrial processes to dissolve or clean other materials, such as in paint stripping, metal cleaning, and dry cleani ...
Honors Chemistry
... Nitrogen is the major component (80% by volume) of the earth’s atmosphere. It is essential to all living things, but not in its diatomic form. Nitrogen makes up DNA, amino acids, and therefore, proteins. Compounds containing nitrogen are what living things need and the most important one is ammonia ...
... Nitrogen is the major component (80% by volume) of the earth’s atmosphere. It is essential to all living things, but not in its diatomic form. Nitrogen makes up DNA, amino acids, and therefore, proteins. Compounds containing nitrogen are what living things need and the most important one is ammonia ...
Hydrogen
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 7000100794000000000♠1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. Non-remnant stars are mainly composed of hydrogen in its plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1H), has one proton and no neutrons.The universal emergence of atomic hydrogen first occurred during the recombination epoch. At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular formula H2. Since hydrogen readily forms covalent compounds with most non-metallic elements, most of the hydrogen on Earth exists in molecular forms such as in the form of water or organic compounds. Hydrogen plays a particularly important role in acid–base reactions as many acid-base reactions involve the exchange of protons between soluble molecules. In ionic compounds, hydrogen can take the form of a negative charge (i.e., anion) when it is known as a hydride, or as a positively charged (i.e., cation) species denoted by the symbol H+. The hydrogen cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds are always more complex species than that would suggest. As the only neutral atom for which the Schrödinger equation can be solved analytically, study of the energetics and bonding of the hydrogen atom has played a key role in the development of quantum mechanics.Hydrogen gas was first artificially produced in the early 16th century, via the mixing of metals with acids. In 1766–81, Henry Cavendish was the first to recognize that hydrogen gas was a discrete substance, and that it produces water when burned, a property which later gave it its name: in Greek, hydrogen means ""water-former"".Industrial production is mainly from the steam reforming of natural gas, and less often from more energy-intensive hydrogen production methods like the electrolysis of water. Most hydrogen is employed near its production site, with the two largest uses being fossil fuel processing (e.g., hydrocracking) and ammonia production, mostly for the fertilizer market. Hydrogen is a concern in metallurgy as it can embrittle many metals, complicating the design of pipelines and storage tanks.