POGIL - Basic Skills Supplement - The Mole-1
... 3. There are an equal number of nitrogen atoms in one mole of NH3 and one mole of N2. 4. The number of Cu atoms in 100 grams of pure copper metal is the same as the number of atoms in 100 grams of cupric oxide. 5. The number of Ni atoms in 100 moles of pure nickel metal is the same as the number of ...
... 3. There are an equal number of nitrogen atoms in one mole of NH3 and one mole of N2. 4. The number of Cu atoms in 100 grams of pure copper metal is the same as the number of atoms in 100 grams of cupric oxide. 5. The number of Ni atoms in 100 moles of pure nickel metal is the same as the number of ...
The Major Classes of Chemical Reactions
... do not conduct an electric current, these substances are called nonelectrolytes. Many other covalent substances, such as benzene (C6H6) and octane (C8H18), do not contain polar bonds, and these substances do not dissolve appreciably in water. A small, but very important, group of H-containing covale ...
... do not conduct an electric current, these substances are called nonelectrolytes. Many other covalent substances, such as benzene (C6H6) and octane (C8H18), do not contain polar bonds, and these substances do not dissolve appreciably in water. A small, but very important, group of H-containing covale ...
Answers to examination questions
... The oxygen molecule (O O) contains one double bond; the carbon dioxide molecule (O C O) contains two double bond and the tetrafluoroethene molecule contains one double bond. ...
... The oxygen molecule (O O) contains one double bond; the carbon dioxide molecule (O C O) contains two double bond and the tetrafluoroethene molecule contains one double bond. ...
materials required/recommended for this paper
... The phosphoric acid fuel cell (PAFC) uses gaseous oxygen and hydrogen to produce electricity. The cell is named so, because the electrolyte is an extremely concentrated solution of phosphoric acid. Both electrodes are made from porous carbon, which is coated with a platinum catalyst. The cell operat ...
... The phosphoric acid fuel cell (PAFC) uses gaseous oxygen and hydrogen to produce electricity. The cell is named so, because the electrolyte is an extremely concentrated solution of phosphoric acid. Both electrodes are made from porous carbon, which is coated with a platinum catalyst. The cell operat ...
Solution - HCC Learning Web
... Plan We write the chemical formulas of the reactants and products and then determine which product is insoluble. We then write and balance the molecular equation. Next, we write each soluble strong electrolyte as separated ions to obtain the complete ionic equation. Finally, we eliminate the spectat ...
... Plan We write the chemical formulas of the reactants and products and then determine which product is insoluble. We then write and balance the molecular equation. Next, we write each soluble strong electrolyte as separated ions to obtain the complete ionic equation. Finally, we eliminate the spectat ...
CHAPTER 15 ACIDS AND BASES
... At this point, we can make an assumption that x is very small compared to 0.60. Hence, 0.60 − x ≈ 0.60 Oftentimes, assumptions such as these are valid if K is very small. A very small value of K means that a very small amount of reactants go to products. Hence, x is small. If we did not make this as ...
... At this point, we can make an assumption that x is very small compared to 0.60. Hence, 0.60 − x ≈ 0.60 Oftentimes, assumptions such as these are valid if K is very small. A very small value of K means that a very small amount of reactants go to products. Hence, x is small. If we did not make this as ...
Subject Materials for Chemistry
... Lime stone is calcium carbonate CaCo3, it decomposes to form quick lime Cao and CO2 on heating. CaCO3 (Lime Stone) ...
... Lime stone is calcium carbonate CaCo3, it decomposes to form quick lime Cao and CO2 on heating. CaCO3 (Lime Stone) ...
Sample Chapter - Chapter 4
... the water molecule: the distribution of its bonding electrons and its overall shape. Recall from Section 2.7 that the electrons in a covalent bond are shared between the bonded atoms. In a covalent bond that exists between identical atoms (as in H2, Cl2, O2, etc.), the sharing is equal. As Figure 4. ...
... the water molecule: the distribution of its bonding electrons and its overall shape. Recall from Section 2.7 that the electrons in a covalent bond are shared between the bonded atoms. In a covalent bond that exists between identical atoms (as in H2, Cl2, O2, etc.), the sharing is equal. As Figure 4. ...
Chapter 16 Aqueous Ionic Equilibrium Lecture Presentation
... • An equation derived from the Ka expression that allows us to calculate the pH of a buffer solution. • The equation calculates the pH of a buffer from the pKa and initial concentrations of the weak acid and salt of the conjugate base, as long as the “x is small” approximation is valid. ...
... • An equation derived from the Ka expression that allows us to calculate the pH of a buffer solution. • The equation calculates the pH of a buffer from the pKa and initial concentrations of the weak acid and salt of the conjugate base, as long as the “x is small” approximation is valid. ...
Answers to examination questions
... Q5 D The oxygen molecule (O=O) contains one double bond; the carbon dioxide molecule (O=C=O) contains two double bond and the tetrafluoroethene molecule contains one double bond. Q6 A B is trigonal planar (bond angles 120°); A, C and D are based upon a tetrahedral arrangement with four regio ...
... Q5 D The oxygen molecule (O=O) contains one double bond; the carbon dioxide molecule (O=C=O) contains two double bond and the tetrafluoroethene molecule contains one double bond. Q6 A B is trigonal planar (bond angles 120°); A, C and D are based upon a tetrahedral arrangement with four regio ...
Problem 5. Inorganic chains and rings
... agent)… The preparative procedure should be designed so as to avoid contamination by silicates or aluminates … Product B, in the form of well-crystallized sky-blue rods, remains stable at 0C if kept free of H2O and CO2… A solution of B in 50% potassium hydroxide turns grassy green upon heating or d ...
... agent)… The preparative procedure should be designed so as to avoid contamination by silicates or aluminates … Product B, in the form of well-crystallized sky-blue rods, remains stable at 0C if kept free of H2O and CO2… A solution of B in 50% potassium hydroxide turns grassy green upon heating or d ...
Name_________________________________________
... 3. If the actual yield is 4.95 g Pb, what is the percent yield? [ANS = 0.415 g, 5.69 g, 87%] Benzocaine is a compound containing carbon, oxygen, hydrogen and nitrogen. When a sample of benzocaine weighing 3.54 g is burned in excess oxygen, 8.49 g of CO2 and 2.14 g of H2O are formed. In a separate ex ...
... 3. If the actual yield is 4.95 g Pb, what is the percent yield? [ANS = 0.415 g, 5.69 g, 87%] Benzocaine is a compound containing carbon, oxygen, hydrogen and nitrogen. When a sample of benzocaine weighing 3.54 g is burned in excess oxygen, 8.49 g of CO2 and 2.14 g of H2O are formed. In a separate ex ...
Prep UK-intro.p65
... We have also endeavoured to apply the IUPAC nomenclature in this collection of problems. For the solutions of physical chemistry problems the units of the equilibrium constant, depending on the particular circumstances, have to be specified. If the constant appears in thermodynamic equations, the eq ...
... We have also endeavoured to apply the IUPAC nomenclature in this collection of problems. For the solutions of physical chemistry problems the units of the equilibrium constant, depending on the particular circumstances, have to be specified. If the constant appears in thermodynamic equations, the eq ...
15.0 EquilibriumIHS2014
... • At A, the concentration (or pressure) of every chemical in the system is decreased by increasing the container volume. Then the equilibrium shifts to the left (the side with more moles of gas) • At B, the temperature is increased. Then the equilibrium shifts to left. • At C, C2H6(g) is added to th ...
... • At A, the concentration (or pressure) of every chemical in the system is decreased by increasing the container volume. Then the equilibrium shifts to the left (the side with more moles of gas) • At B, the temperature is increased. Then the equilibrium shifts to left. • At C, C2H6(g) is added to th ...
664
... Reactions with reducing agents can be explosive. The compound attacks most metals almost as vigorously as fluorine. It spontaneously ignites boron, silicon, phosphorus, arsenic, antimony, and iodine at ordinary temperatures. Nitryl fluoride can add a nitrate group to many organics forming their nitr ...
... Reactions with reducing agents can be explosive. The compound attacks most metals almost as vigorously as fluorine. It spontaneously ignites boron, silicon, phosphorus, arsenic, antimony, and iodine at ordinary temperatures. Nitryl fluoride can add a nitrate group to many organics forming their nitr ...
Harrisburg Area Community College 2013/2014
... Mixtures are classified as either homogeneous or heterogeneous. When a mixture is homogeneous, techniques such as evaporation and crystallization are used to separate the mixture into its components. When a mixture is heterogeneous, techniques such as filtration and decantation are used to separate ...
... Mixtures are classified as either homogeneous or heterogeneous. When a mixture is homogeneous, techniques such as evaporation and crystallization are used to separate the mixture into its components. When a mixture is heterogeneous, techniques such as filtration and decantation are used to separate ...
Answers - Pearson-Global
... Note: This is included because it is a simple example of a perfectly stable covalent compound where there aren’t four pairs of electrons around one of the atoms – in other words, it is nothing like a noble gas structure. Despite the impression often given at GCSE, such compounds are very common – al ...
... Note: This is included because it is a simple example of a perfectly stable covalent compound where there aren’t four pairs of electrons around one of the atoms – in other words, it is nothing like a noble gas structure. Despite the impression often given at GCSE, such compounds are very common – al ...
Hydroxide
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. It functions as a base, a ligand, a nucleophile and a catalyst. The hydroxide ion forms salts, some of which dissociate in aqueous solution, liberating solvated hydroxide ions. Sodium hydroxide is a multi-million-ton per annum commodity chemical. A hydroxide attached to a strongly electropositive center may itself ionize, liberating a hydrogen cation (H+), making the parent compound an acid.The corresponding electrically neutral compound •HO is the hydroxyl radical. The corresponding covalently-bound group -OH of atoms is the hydroxyl group.Hydroxide ion and hydroxyl group are nucleophiles and can act as a catalyst in organic chemistry.Many inorganic substances which bear the word ""hydroxide"" in their names are not ionic compounds of the hydroxide ion, but covalent compounds which contain hydroxyl groups.