1 Basic Concepts About Matter 2 Measurements In Chemistry 3 Atomic Structures And The Periodic Table 4 Chemical Bonding: The Ionic Bond Model 5 Chemical Bonding: The Covalent Bond Model 6 Chemical Calculations: Formula Masses, Moles, And Chemical Equations 7 Gases, Liquids, And Solids 8 Solutions 9 Chemical Reactions 10 Acids, Bases, And Salts 11 Nuclear Chemistry 12 Saturated Hydrocarbons 13 Unsaturated Hydrocarbons 14 Alcohols, Phenols And Ethers 15 Aldehydes And Ketones 16 Carboxylic Acids, Esters, And Other Acid Derivatives 17 Amines And Amides 18 Carbohydrates 19 Lipids 20 Proteins 21 Enzymes And Vitamins 22 Nucleic Acids 23 Biochemical Energy Production 24 Carbohydrate Metabolism 25 Lipid Metabolism 26 Protein Metabolism Chapter6: Chemical Calculations: Formula Masses, Moles, And Chemical Equations
6.1 Formula Masses 6.2 The Mole: A Counting Unit For Chemists 6.3 The Mass Of A Mole 6.4 Chemical Formulas And The Mole Concept 6.5 The Mole And Chemical Calculations 6.6 Writing And Balancing Chemical Equations 6.7 Chemical Equations And The Mole Concept 6.8 Chemical Calculations Using Chemical Equations 6.9 Yields: Theoretical, Actual, And Percent Chapter Questions Section: Chapter Questions
Problem 6.1EP: Calculate, to two decimal places, the formula mass of each of the following substances. Obtain the... Problem 6.2EP: Calculate, to two decimal places, the formula mass of each of the following substances. Obtain the... Problem 6.3EP: The compound 1-propanethiol, which is the eye irritant released when fresh onions are chopped up,... Problem 6.4EP: A compound associated with the odor of garlic on a persons breath has the chemical formula CyH8S and... Problem 6.5EP: Indicate the number of objects present in each of the following molar quantities. a. Number of... Problem 6.6EP: Indicate the number of objects present in each of the following molar quantities. a. Number of... Problem 6.7EP: A sample is found to contain 0.500 mole of a chemical substance. a. How many atoms are present if... Problem 6.8EP: A sample is found to contain 0.800 mole of a chemical substance. a. How many atoms are present if... Problem 6.9EP: Select the quantity that contains the greater number of atoms in each of the following pairs of... Problem 6.10EP: Select the quantity that contains the greater number of atoms in each of the following pairs of... Problem 6.11EP: What is the mass, in grams, of 1.000 mole of each of the following substances? a. Ca (calcium) b. Ag... Problem 6.12EP: What is the mass, in grams, of 1.000 mole of each of the following substances? a. S (sulfur) b. Mg... Problem 6.13EP: How much, in grams, does each of the following quantities of matter weigh? a. 2.00 moles of C atoms... Problem 6.14EP: How much, in grams, does each of the following quantities of matter weigh? a. 3.00 moles of P atoms... Problem 6.15EP: How many moles of specified particles are present in a sample of each of the following substances if... Problem 6.16EP: How many moles of specified particles are present in a sample of each of the following substances if... Problem 6.17EP: What is the formula mass of a compound whose molar mass is 44.01 g? Problem 6.18EP: What is the formula mass of a compound whose molar mass is 28.01 g? Problem 6.19EP: The mass of 7.00 moles of a compound is determined to be 140.07 g. What is the formula mass of the... Problem 6.20EP: The mass of 5.00 moles of a compound is determined to be 308.05 g. What is the formula mass of the... Problem 6.21EP: How many moles of oxygen atoms are present in 2.00-mole samples of each of the following compounds?... Problem 6.22EP: How many moles of nitrogen atoms are present in 3.00-mole samples of each of the following... Problem 6.23EP: How many total moles of atoms are present in each of the samples in Problem 6-21? a. H2SO3 b. H2S2O7... Problem 6.24EP Problem 6.25EP: Write the six mole-to-mole conversion factors that can be derived from each of the following... Problem 6.26EP: Write the six mole-to-mole conversion factors that can be derived from each of the following... Problem 6.27EP Problem 6.28EP: Based on the chemical formula H2CO3, write the conversion factor that would be needed to do each of... Problem 6.29EP: Determine the number of atoms present in 20.0 g samples of each of the following elements? a. Be b.... Problem 6.30EP: Determine the number of atoms present in 30.0 g samples of each of the following elements? a. B b.... Problem 6.31EP: Determine the mass, in grams, of each of the following quantities of substance. a. 6.02 1023 copper... Problem 6.32EP: Determine the mass, in grams, of each of the following quantities of substance. a. 6.02 1023 silver... Problem 6.33EP: Determine the number of moles of substance present in each of the following quantities. a. 10.0 g He... Problem 6.34EP: Determine the number of moles of substance present in each of the following quantities. a. 25.0 g N... Problem 6.35EP: Determine the number of atoms of sulfur present in each of the following quantities. a. 10.0 g H2... Problem 6.36EP: Determine the number of atoms of nitrogen present in each of the following quantities. a. 10.0 g... Problem 6.37EP: Determine the number of grams of sulfur present in each of the following quantities. a. 3.01 1023... Problem 6.38EP: Determine the number of grams of oxygen present in each of the following quantities. a. 4.50 1022... Problem 6.39EP Problem 6.40EP Problem 6.41EP: A compound has a molar mass of 34.02 g. What is its chemical formula if hydrogen and oxygen are... Problem 6.42EP: A compound has a molar mass of 32.06 g. What is its chemical formula if nitrogen and hydrogen are... Problem 6.43EP: Indicate whether each of the following chemical equations is balanced. a. SO3 + H2O H2SO4 b. CuO +... Problem 6.44EP: Indicate whether each of the following chemical equations is balanced. a. H2 + O2 H2O b. NO + O2 ... Problem 6.45EP Problem 6.46EP: How many total atoms does each of the following expressions, extracted from balanced chemical... Problem 6.47EP: How many oxygen atoms are present on the reactant side and on the product side of each of the... Problem 6.48EP: How many oxygen atoms are present on the reactant side and on the product side of each of the... Problem 6.49EP Problem 6.50EP: Balance the following chemical equations. a. H2S + O2 SO2 + H2O b. Ni + HCl NiCl2 + H2 c. IBr +... Problem 6.51EP Problem 6.52EP: Balance the following chemical equations. a. C2H4 + O2 CO2 + H2O b. C6H12 + O2 CO2 + H2O c. C3H6O... Problem 6.53EP Problem 6.54EP: After the following chemical equation was balanced, the name of one of the reactants was substituted... Problem 6.55EP: The following diagrams represent the reaction of A2 (red spheres) with B2 (blue spheres) to give... Problem 6.56EP: The following diagrams represent the reaction of A2 (red spheres) with B2 (blue spheres) to give... Problem 6.57EP Problem 6.58EP Problem 6.59EP: Write the six mole-to-mole conversion factors that can be derived from the balanced chemical... Problem 6.60EP Problem 6.61EP: For the chemical reaction Sb2S3+6HCl2SbCl3+3H2S write the conversion factor that would be needed to... Problem 6.62EP: For the chemical reaction UF6+2H2OUO2F2+4HF write the conversion factor that would be needed to do... Problem 6.63EP: Using each of the following balanced chemical equations, calculate the number of moles of the first... Problem 6.64EP: Using each of the following balanced chemical equations, calculate the number of moles of the first... Problem 6.65EP: For the chemical reaction C6H12O6+6O26CO2+6H2O how many product molecules are formed when seven... Problem 6.66EP: For the chemical reaction C3H8O2+4O23CO2+4H2O how many product molecules are formed when nine C3H8O2... Problem 6.67EP: How many water molecules (H2O) are needed to react with 8 ethene molecules (C2H4) to produce ethyl... Problem 6.68EP: How many carbon monoxide molecules (CO) are needed to react with 8 hydrogen molecules (H2) to... Problem 6.69EP: The following diagram represents the high-temperature reaction between CH4 and O2. Use this diagram... Problem 6.70EP: The following diagram represents the high-temperature reaction between CH4 and H2O. Use this diagram... Problem 6.71EP: How many moles of beryllium (Be) are needed to completely react with 10.0 moles of N2 in the... Problem 6.72EP: How many moles of magnesium (Mg) are needed to completely react with 8.0 moles of O2 in the... Problem 6.73EP: The principal constituent of natural gas is methane, which burns in air according to the reaction... Problem 6.74EP: Tungsten (W) metal, which is used to make incandescent bulb filaments, is produced by the reaction... Problem 6.75EP: The catalytic converter that is standard equipment on American automobiles converts carbon monoxide... Problem 6.76EP: A mixture of hydrazine (N2H4) and hydrogen peroxide (H2O2) is used as a fuel for rocket engines.... Problem 6.77EP: Both water and sulfur dioxide are products from the reaction of sulfuric acid (H2SO4) with copper... Problem 6.78EP: Potassium thiosulfate (K2S2O3) is used to remove any excess chlorine from fibers and fabrics that... Problem 6.79EP: How many grams of beryllium (Be) are needed to react completely with 45.0 g of nitrogen (N2) in the... Problem 6.80EP: How many grams of aluminum (Al) are needed to react completely with 55.0 g of sulfur (S) in the... Problem 6.81EP: The theoretical yield of product for a particular reaction is 32.03 g. A very meticulous student... Problem 6.82EP: The theoretical yield of product for a particular reaction is 64.55 g. A very careless student... Problem 6.83EP Problem 6.84EP: In an experiment designed to produce calcium oxide by the chemical reaction 2Ca + O2 2CaO 177.2 g... Problem 6.85EP: If 125.5 g of Ca3N2 were produced from 29.0 g of N2 and an excess of Ca according to the reaction... Problem 6.86EP: If 64.15 g of HCl were produced from 2.07 g of H2 and an excess of Cl2 according to the reaction H2... Problem 6.66EP: For the chemical reaction C3H8O2+4O23CO2+4H2O how many product molecules are formed when nine C3H8O2...
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A chemical reaction is predicted to produce 87.5 grams of PbCrO4 . If 0.22 moles of PbCrO4 are experimentally obtained, what is the percent yield?
Definition Definition Transformation of a chemical species into another chemical species. A chemical reaction consists of breaking existing bonds and forming new ones by changing the position of electrons. These reactions are best explained using a chemical equation.
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