AP Chemistry Summer 2009
... _____________c. If the actual yield from an experiment is only 300.0 g, what is the percent yield of this reaction? _____________d. If 25.0 g of Mg are react with 14.0 g N2, which is the limiting reactant and how many grams of Mg3N2 will form? 6. Balance first: __LiOH + __KCl __ LiCl + __KOH ______ ...
... _____________c. If the actual yield from an experiment is only 300.0 g, what is the percent yield of this reaction? _____________d. If 25.0 g of Mg are react with 14.0 g N2, which is the limiting reactant and how many grams of Mg3N2 will form? 6. Balance first: __LiOH + __KCl __ LiCl + __KOH ______ ...
heptane
... 8. Are the following pairs enantiomers or diastereomers? Also label each molecule as a D sugar or L sugar. ...
... 8. Are the following pairs enantiomers or diastereomers? Also label each molecule as a D sugar or L sugar. ...
General Chemistry Questions
... soluble in aqueous ammonia, due to the formation of the complex ion Ag(NH3)2+. How many moles of AgCl will dissolve in 1.00 L of solution containing 6.0 moles of free NH3? (Kf for Ag(NH3)2+ = 1.7 x 107) a. b. c. d. e. ...
... soluble in aqueous ammonia, due to the formation of the complex ion Ag(NH3)2+. How many moles of AgCl will dissolve in 1.00 L of solution containing 6.0 moles of free NH3? (Kf for Ag(NH3)2+ = 1.7 x 107) a. b. c. d. e. ...
Chapter Nine Organic Chemistry Hydrocarbon 1
... 1- Alkenes group : which are characterized by the presence of a double bond or more in the carbon chain . 2- Alkynes group : which are characterized by the presence of a triple bond in the carbon chain . 40-Olefins are hydrocarbons in which, one double bond or more are found between the carbon atom ...
... 1- Alkenes group : which are characterized by the presence of a double bond or more in the carbon chain . 2- Alkynes group : which are characterized by the presence of a triple bond in the carbon chain . 40-Olefins are hydrocarbons in which, one double bond or more are found between the carbon atom ...
Redox - edl.io
... 6. In its covalent compounds with nonmetals, hydrogen is assigned an oxidation state of +1. Metal hydrides are an exception; H is at the end of the chemical formula since it has an oxidation state of 1-. 7. The sum of the oxidation states must be zero for an electrically neutral compound. For a poly ...
... 6. In its covalent compounds with nonmetals, hydrogen is assigned an oxidation state of +1. Metal hydrides are an exception; H is at the end of the chemical formula since it has an oxidation state of 1-. 7. The sum of the oxidation states must be zero for an electrically neutral compound. For a poly ...
Exam 2, Fall 2001
... ______ NH4NO3(s) → ______ N2(g) + ______ H2O(g) + ______ O2(g) (b) Combustion of octane. ______ C8H18(liq) + ______ O2(g) → ______ H2O(g) + ______ CO2(g) 2. (8 points) Iron ore is reduced to iron metal with carbon. 2 Fe2O3(s) + 3 C(s) → 4 Fe(s) + 3 CO2 (g) (a) If 6.2 moles of Fe2O3(s) are reduced, _ ...
... ______ NH4NO3(s) → ______ N2(g) + ______ H2O(g) + ______ O2(g) (b) Combustion of octane. ______ C8H18(liq) + ______ O2(g) → ______ H2O(g) + ______ CO2(g) 2. (8 points) Iron ore is reduced to iron metal with carbon. 2 Fe2O3(s) + 3 C(s) → 4 Fe(s) + 3 CO2 (g) (a) If 6.2 moles of Fe2O3(s) are reduced, _ ...
Sodium acetate Product Number S 8750 Product - Sigma
... the presence of varying salts, including sodium acetate, at different ionic strengths has been ...
... the presence of varying salts, including sodium acetate, at different ionic strengths has been ...
DCC-promoted peptide coupling
... equivalent of proton source in DMSO are allowed to react overnight at room temperature. The reaction is quenched with acid. Dehydration Alcohols can also be dehydrated using DCC. This reaction proceeds by first giving the O-acylurea intermediate which is then hydrogenolyzed to produce the correspond ...
... equivalent of proton source in DMSO are allowed to react overnight at room temperature. The reaction is quenched with acid. Dehydration Alcohols can also be dehydrated using DCC. This reaction proceeds by first giving the O-acylurea intermediate which is then hydrogenolyzed to produce the correspond ...
Semester 1 Final Exam
... (C) 0.10 M (D) 0.20 M 43. List the following solutions prepared with the same solute in order of increasing concentration: I. 30.0 g solute in a 240 mL solution II. 30.0 g solute in a 120 mL solution III. 60.0 g solute in a 120 mL solution (A) I < II < III (B) II < I < III (C) II < III
... (C) 0.10 M (D) 0.20 M 43. List the following solutions prepared with the same solute in order of increasing concentration: I. 30.0 g solute in a 240 mL solution II. 30.0 g solute in a 120 mL solution III. 60.0 g solute in a 120 mL solution (A) I < II < III (B) II < I < III (C) II < III
Fe(H2O)63+ + H2O → ← H3O+ + Fe(H2O)5(OH)2+
... 66. Consider the equation: 2 NaI(aq) + Cl2(g) ÆI2 (aq) + 2 NaCl(aq) The element undergoing reduction is (A) (B) (C) (D) ...
... 66. Consider the equation: 2 NaI(aq) + Cl2(g) ÆI2 (aq) + 2 NaCl(aq) The element undergoing reduction is (A) (B) (C) (D) ...
2C - Edexcel
... 4 A student investigated the neutralisation of acids by measuring the temperature changes when alkalis were added to acids of known concentrations. He used this apparatus to add different volumes of sodium hydroxide solution to a fixed volume of dilute nitric acid. ...
... 4 A student investigated the neutralisation of acids by measuring the temperature changes when alkalis were added to acids of known concentrations. He used this apparatus to add different volumes of sodium hydroxide solution to a fixed volume of dilute nitric acid. ...
AP CHEMISTRY - An Incomplete List of Topics
... Example: When Na2CO3(s) is heated, it will decompose to form CO2(g). Solid Na2O will also be formed as the remainder of the original compound. The Na2O(s) will slowly re-absorb CO2(g) from the air and convert back into Na2CO3(s). Other carbonates follow this same pattern, as seen in the reaction of ...
... Example: When Na2CO3(s) is heated, it will decompose to form CO2(g). Solid Na2O will also be formed as the remainder of the original compound. The Na2O(s) will slowly re-absorb CO2(g) from the air and convert back into Na2CO3(s). Other carbonates follow this same pattern, as seen in the reaction of ...
1-Chemistry-101
... 5. How is a molecule different from a compound? • Combinations of atoms are called molecules. A molecule is a part of matter that is made up of more than one atom. Molecules may contain one kind of atom or more than one kind of atom. • Compounds are made up of two or more different kinds of atoms. ...
... 5. How is a molecule different from a compound? • Combinations of atoms are called molecules. A molecule is a part of matter that is made up of more than one atom. Molecules may contain one kind of atom or more than one kind of atom. • Compounds are made up of two or more different kinds of atoms. ...
Chemistry Honors Study Guide – Organic Chemistry You should be
... Memorize hydrocarbon prefixes 1 10 ...
... Memorize hydrocarbon prefixes 1 10 ...
Organolithium reagent
... Å RÄLi + LiX.[1] A side reaction of this synthesis, especially with alkyl iodides, is the Wurtz reaction, in which an RÄLi species reacts with an RÄX species forming an R-R coupled product. This side reaction can be almost completely avoided by using alkyl chlorides or bromides. A second method is t ...
... Å RÄLi + LiX.[1] A side reaction of this synthesis, especially with alkyl iodides, is the Wurtz reaction, in which an RÄLi species reacts with an RÄX species forming an R-R coupled product. This side reaction can be almost completely avoided by using alkyl chlorides or bromides. A second method is t ...
Revised Higher 2014 Paper
... To extract the essential oil, steam is passed through shredded strawberry gum leaves. The steam and essential oil are then condensed and collected. (i) Complete the diagram to show an apparatus suitable for carrying out this ...
... To extract the essential oil, steam is passed through shredded strawberry gum leaves. The steam and essential oil are then condensed and collected. (i) Complete the diagram to show an apparatus suitable for carrying out this ...
CH 3
... secondary (2°), or tertiary (3°), depending on how many carbon groups are connected to the nitrogen atom. ...
... secondary (2°), or tertiary (3°), depending on how many carbon groups are connected to the nitrogen atom. ...
When 1°, 2°, aromatic amines or aryl amines . (Rand
... It is believed that sulphonation of amines proceeds by a mechanism that is entirely different from ordinary aromatic substitution. Sulphanilic acid (p-Aminobenzenesulphonic acid) is a salt of special type, called a dipolar ion* (sometimes called a Zwitterion). It is formed by the reaction of on acid ...
... It is believed that sulphonation of amines proceeds by a mechanism that is entirely different from ordinary aromatic substitution. Sulphanilic acid (p-Aminobenzenesulphonic acid) is a salt of special type, called a dipolar ion* (sometimes called a Zwitterion). It is formed by the reaction of on acid ...
CH 3
... secondary (2°), or tertiary (3°), depending on how many carbon groups are connected to the nitrogen atom. ...
... secondary (2°), or tertiary (3°), depending on how many carbon groups are connected to the nitrogen atom. ...
Chapter 4 - Aqueous Reactions
... We has seen that some metals react with air, some also react with acids to give hydrogen. We have seen that some metals can be oxidized by ions of other metals. All this is summarized in the activity ...
... We has seen that some metals react with air, some also react with acids to give hydrogen. We have seen that some metals can be oxidized by ions of other metals. All this is summarized in the activity ...
Lewis base-assisted Lewis acid-catalyzed selective
... Acid‐catalyzed dehydration of alcohols has been widely employed for the synthesis of alkenes. However, activated alcohols when employed as substrates in dehydration reactions are often plagued by the lack of alkene selectivity. In this work, the reaction system can be signif ...
... Acid‐catalyzed dehydration of alcohols has been widely employed for the synthesis of alkenes. However, activated alcohols when employed as substrates in dehydration reactions are often plagued by the lack of alkene selectivity. In this work, the reaction system can be signif ...
Aldehyde and Ketone Identification
... Green precipitate and loss of orange color indicates presence of an aldehyde w/ aliphatic aldehydes – turns cloudy in 5 sec. and forms precipitate w/in 30 sec. If solution remains orange bur precipitate forms = negative result. ...
... Green precipitate and loss of orange color indicates presence of an aldehyde w/ aliphatic aldehydes – turns cloudy in 5 sec. and forms precipitate w/in 30 sec. If solution remains orange bur precipitate forms = negative result. ...
Strychnine total synthesis
Strychnine total synthesis in chemistry describes the total synthesis of the complex biomolecule strychnine. The first reported method by the group of Robert Burns Woodward in 1954 is considered a classic in this research field. At the time it formed the natural conclusion to an elaborate process of molecular structure elucidation that started with the isolation of strychnine from the beans of Strychnos ignatii by Pierre Joseph Pelletier and Joseph Bienaimé Caventou in 1818. Major contributors to the entire effort were Sir Robert Robinson with over 250 publications and Hermann Leuchs with another 125 papers in a time span of 40 years. Robinson was awarded the Nobel Prize in Chemistry in 1947 for his work on alkaloids, strychnine included. The process of chemical identification was completed with publications in 1946 by Robinson and later confirmed by Woodward in 1947. X-ray structures establishing the absolute configuration became available between 1947 and 1951 with publications from J. M. Bijvoet and J.H. Robertson .Woodward published a very brief account on the strychnine synthesis in 1954 (just 3 pages) and a lengthy one (42 pages) in 1963.Many more methods exist and reported by the research groups of Magnus, Overman, Kuehne, Rawal, Bosch, Vollhardt, Mori, Shibasaki, Li, Fukuyama Vanderwal and MacMillan. Synthetic (+)-strychnine is also known. Racemic synthesises were published by Padwa in 2007 and in 2010 by Andrade and by Reissig.In his 1963 publication Woodward quoted Sir Robert Robinson who said for its molecular size it is the most complex substance known.