Cleaning Up With Atom Economy
... Atom economy means maximizing the incorporation of material from the starting materials or reagents into the final product. It is essentially pollution prevention at the molecular level. For example, a chemist practicing atom economy would choose to synthesize a needed product by putting together ba ...
... Atom economy means maximizing the incorporation of material from the starting materials or reagents into the final product. It is essentially pollution prevention at the molecular level. For example, a chemist practicing atom economy would choose to synthesize a needed product by putting together ba ...
Slide 1 / 55 Slide 2 / 55 Slide 3 / 55
... that is heated from absolute zero to a temperature above the boiling point of the liquid. Which of the following processes produces the greatest increase in the entropy of the substance? A ...
... that is heated from absolute zero to a temperature above the boiling point of the liquid. Which of the following processes produces the greatest increase in the entropy of the substance? A ...
class xii – preparatory examination - 1
... than water.The gas is also soluble in CCl4.Its solution in alcohol is used as an antiseptic.Identify ‘A’ and ‘B’ and explain the observations. 12. Which is more acidic-phenol or p-nitrophenol ? Explain. 13. How will you distinguish between : ...
... than water.The gas is also soluble in CCl4.Its solution in alcohol is used as an antiseptic.Identify ‘A’ and ‘B’ and explain the observations. 12. Which is more acidic-phenol or p-nitrophenol ? Explain. 13. How will you distinguish between : ...
Sample pages 2 PDF
... to its mass. For instance, organic compounds are made of carbon atoms. If there are no carbon atoms, then compounds are considered as inorganic. Functional groups. These molecules are made of a carbon atom bonded with one of the other atoms allowed in organic compounds. Functional groups are importa ...
... to its mass. For instance, organic compounds are made of carbon atoms. If there are no carbon atoms, then compounds are considered as inorganic. Functional groups. These molecules are made of a carbon atom bonded with one of the other atoms allowed in organic compounds. Functional groups are importa ...
Ex - Bosna Sema
... g of ammonia produced 1.87 g of hydrogen, what was the percent yield? 19a) Excess hydrochloric acid was reacted with 8.57 g of calcium carbonate and produced 3.11 g of CO2. What was the percent yield? b) In another experiment, using 9.21 g of calcium carbonate, 1.90 L of CO2 was collected. What is t ...
... g of ammonia produced 1.87 g of hydrogen, what was the percent yield? 19a) Excess hydrochloric acid was reacted with 8.57 g of calcium carbonate and produced 3.11 g of CO2. What was the percent yield? b) In another experiment, using 9.21 g of calcium carbonate, 1.90 L of CO2 was collected. What is t ...
Chemistry 11 – Course Review
... 10. What volume of 2.50 M Li2CO3 would need to be evaporated in order to obtain 47.232 g of solid Li2CO3? Include proper units in your work and in your answers. ...
... 10. What volume of 2.50 M Li2CO3 would need to be evaporated in order to obtain 47.232 g of solid Li2CO3? Include proper units in your work and in your answers. ...
chemistry
... Record the number of your choice for each Part A and Part B–1 multiple-choice question on your separate answer sheet. Write your answers to the Part B–2 and Part C questions in your answer booklet. All work should be written in pen, except for graphs and drawings, which should be done in pencil. You ...
... Record the number of your choice for each Part A and Part B–1 multiple-choice question on your separate answer sheet. Write your answers to the Part B–2 and Part C questions in your answer booklet. All work should be written in pen, except for graphs and drawings, which should be done in pencil. You ...
CHEM181H1_06_2013_Y_P1
... (d) they communicate or attempt to communicate any information relating to the examination to another candidate while the examination is in progress. (e) they use a false name or identity number in an examination. (f) they commit any other fraudulent, deceitful or dishonest practice which would mi ...
... (d) they communicate or attempt to communicate any information relating to the examination to another candidate while the examination is in progress. (e) they use a false name or identity number in an examination. (f) they commit any other fraudulent, deceitful or dishonest practice which would mi ...
TOPIC 11 Further equilibrium 11.1 Chemical equilibrium
... Acidic. NH4NO3 is a salt of a strong acid (HNO3) and a weak base (NH3). Alkaline. CH3CH2COOK is a salt of a weak acid (CH3CH2COOH) and a strong base (KOH). Neutral. NaNO3 is a salt of a strong acid (HNO3) and a strong base (NaOH). ...
... Acidic. NH4NO3 is a salt of a strong acid (HNO3) and a weak base (NH3). Alkaline. CH3CH2COOK is a salt of a weak acid (CH3CH2COOH) and a strong base (KOH). Neutral. NaNO3 is a salt of a strong acid (HNO3) and a strong base (NaOH). ...
Chemical Equations
... Chemical Equations Identify the substances involved in a chemical process Distinguish between the reactants and products in a chemical process Allow easy determination of quantities of substances involved in chemical processes ...
... Chemical Equations Identify the substances involved in a chemical process Distinguish between the reactants and products in a chemical process Allow easy determination of quantities of substances involved in chemical processes ...
Homework1-4-Answers
... (d) A: 10,5B B: 14, 7N -3 C: 39,19K+ D: 66, 30Zn 2+ E: 81,35Br− F: 11,5B G: 19,9F 15.0 Identify the elements represented by the following symbols and give the number of protons and neutrons in each case: (a) Ne, 10 p, 10 n (b) Cu, 29 p, 34 n (c) Ag, 47 p, 60 n (d) W, 74 p, 108 n (e) Po, 84 p, 119 n ...
... (d) A: 10,5B B: 14, 7N -3 C: 39,19K+ D: 66, 30Zn 2+ E: 81,35Br− F: 11,5B G: 19,9F 15.0 Identify the elements represented by the following symbols and give the number of protons and neutrons in each case: (a) Ne, 10 p, 10 n (b) Cu, 29 p, 34 n (c) Ag, 47 p, 60 n (d) W, 74 p, 108 n (e) Po, 84 p, 119 n ...
VCE Chemistry Study Design
... The VCAA Bulletin VCE, VCAL and VET is the only official source of changes to regulations and accredited studies. The Bulletin, including supplements, also regularly includes advice on VCE studies. It is the responsibility of each VCE teacher to refer to each issue of the Bulletin. The Bulletin is a ...
... The VCAA Bulletin VCE, VCAL and VET is the only official source of changes to regulations and accredited studies. The Bulletin, including supplements, also regularly includes advice on VCE studies. It is the responsibility of each VCE teacher to refer to each issue of the Bulletin. The Bulletin is a ...
IB Chemistry HL Topic5 Questions 1. Which
... of water, H2O(l), are –394 kJ mol–1 and –286 kJ mol –1 respectively. Calculate the standard enthalpy change of formation of phenol, C6H5OH(s). ...
... of water, H2O(l), are –394 kJ mol–1 and –286 kJ mol –1 respectively. Calculate the standard enthalpy change of formation of phenol, C6H5OH(s). ...
File
... The halide ion is the 1 charged ion that halogens form when in ionic compounds. As can be seen from the positive standard reduction potentials in Table 20.6, the halogens energetically favor the X form over the X2 form. Because the reduction potentials are so large, this give an indication of the ...
... The halide ion is the 1 charged ion that halogens form when in ionic compounds. As can be seen from the positive standard reduction potentials in Table 20.6, the halogens energetically favor the X form over the X2 form. Because the reduction potentials are so large, this give an indication of the ...
Chemical Reactions - 2012 Book Archive
... measurable quantity in the laboratory—a given mass of sample. The unit that provides this link is the mole (mol)6, from the Latin moles, meaning “pile” or “heap” (not from the small subterranean animal!). Many familiar items are sold in numerical quantities that have unusual names. For example, cans ...
... measurable quantity in the laboratory—a given mass of sample. The unit that provides this link is the mole (mol)6, from the Latin moles, meaning “pile” or “heap” (not from the small subterranean animal!). Many familiar items are sold in numerical quantities that have unusual names. For example, cans ...
chemical change
... The evidence for a chemical reaction occurring, is the formation of a substance which is different from the original reactant or reactant, this is often accompanied by changes in energy, which are measured as temperature changes. Thus for the reaction of the silver metal sodium with the green/yellow ...
... The evidence for a chemical reaction occurring, is the formation of a substance which is different from the original reactant or reactant, this is often accompanied by changes in energy, which are measured as temperature changes. Thus for the reaction of the silver metal sodium with the green/yellow ...
Chapter 23 Metals and Metallurgy
... Steel • The impurities are oxidized by O2 (except phosphorus, which reacts with CaO) to compounds easily separated from the molten iron. • Purified molten steel is poured into molds. ...
... Steel • The impurities are oxidized by O2 (except phosphorus, which reacts with CaO) to compounds easily separated from the molten iron. • Purified molten steel is poured into molds. ...
View PDF - CiteSeerX
... relates gene products that encode enzymes to the reactions these enzymes catalyze. EcoCyc also includes transport reactions and signaling pathways. 1.1 Metabolic Analysis and Nutrition-Related Studies Metabolic analysis is usually carried out through quantitative calculation of the fluxes of chemica ...
... relates gene products that encode enzymes to the reactions these enzymes catalyze. EcoCyc also includes transport reactions and signaling pathways. 1.1 Metabolic Analysis and Nutrition-Related Studies Metabolic analysis is usually carried out through quantitative calculation of the fluxes of chemica ...
Chemistry 1250 - Sp17 Solutions for Midterm 1
... For molecular compounds the less electronegative element is generally written first in the formula and is named first in the name. The second element (more electronegative element) in the formula is named by using the stem of the name and the suffix -ide. Numerical prefixes, indicating the numbers o ...
... For molecular compounds the less electronegative element is generally written first in the formula and is named first in the name. The second element (more electronegative element) in the formula is named by using the stem of the name and the suffix -ide. Numerical prefixes, indicating the numbers o ...
Answers - logo Pre-U Chemistry Textbook
... The two things that affect the size of hydration energies are ionic radius and the charge on the ion. The higher the charge on the ion the more exothermic ∆hydrH. The value for Mg2+ is nearly five times as large as Na+. Al3+ is nearly two and a half times as big as Mg2+. By comparing the values for ...
... The two things that affect the size of hydration energies are ionic radius and the charge on the ion. The higher the charge on the ion the more exothermic ∆hydrH. The value for Mg2+ is nearly five times as large as Na+. Al3+ is nearly two and a half times as big as Mg2+. By comparing the values for ...
2(g)
... for the products and the reactants. Be sure to include all states of matter! 2) Balance the atoms or ion present in the greatest number. You may do this by finding the lowest common multiple of the two. 3) Continue to systematically balance the rest of the atoms or ions. 4) Check the final equation. ...
... for the products and the reactants. Be sure to include all states of matter! 2) Balance the atoms or ion present in the greatest number. You may do this by finding the lowest common multiple of the two. 3) Continue to systematically balance the rest of the atoms or ions. 4) Check the final equation. ...
Redox
Redox reactions include all chemical reactions in which atoms have their oxidation state changed; in general, redox reactions involve the transfer of electrons between species. The term ""redox"" comes from two concepts involved with electron transfer: reduction and oxidation. It can be explained in simple terms: Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, these are only specific examples of a more general concept of reactions involving electron transfer.Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. Like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously. The oxidation alone and the reduction alone are each called a half-reaction, because two half-reactions always occur together to form a whole reaction. When writing half-reactions, the gained or lost electrons are typically included explicitly in order that the half-reaction be balanced with respect to electric charge.Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation state — the actual transfer of electrons may never occur. The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state. In practice, the transfer of electrons will always cause a change in oxidation state, but there are many reactions that are classed as ""redox"" even though no electron transfer occurs (such as those involving covalent bonds).There are simple redox processes, such as the oxidation of carbon to yield carbon dioxide (CO2) or the reduction of carbon by hydrogen to yield methane (CH4), and more complex processes such as the oxidation of glucose (C6H12O6) in the human body through a series of complex electron transfer processes.