chapter 2 - chemical equations and reaction yields
... Note that there was no place where we had to deal with the oxygens. These are balanced as a result of the others being done. The final check is that both sides have 2 K, 1 S, 3 O, 2 H, and 2 Cl. (d) ___ NH3 + ___ O2 + ___ CH4 → ___ HCN + ___ H2O We start with the NH3: _1_ NH3 + ___ O2 + ___ CH4 → __ ...
... Note that there was no place where we had to deal with the oxygens. These are balanced as a result of the others being done. The final check is that both sides have 2 K, 1 S, 3 O, 2 H, and 2 Cl. (d) ___ NH3 + ___ O2 + ___ CH4 → ___ HCN + ___ H2O We start with the NH3: _1_ NH3 + ___ O2 + ___ CH4 → __ ...
Chapter 4
... Strategy: Hydrogen displacement: Any metal above hydrogen in the activity series will displace it from water or from an acid. Metals below hydrogen will not react with either water or an acid. Solution: Only (b) Li and (d) Ca are above hydrogen in the activity series, so they are the only metals in ...
... Strategy: Hydrogen displacement: Any metal above hydrogen in the activity series will displace it from water or from an acid. Metals below hydrogen will not react with either water or an acid. Solution: Only (b) Li and (d) Ca are above hydrogen in the activity series, so they are the only metals in ...
Chapter 3 Solutions - Bremerton School District
... When balancing reactions, start with elements that appear in only one of the reactants and one of the products, then go on to balance the remaining elements. a. Fe + O2 ÷ Fe2O3. Balancing Fe first, then O, gives: 2 Fe + 3/2 O2 ÷ Fe2O3. The best balanced equation contains the smallest whole numbers. ...
... When balancing reactions, start with elements that appear in only one of the reactants and one of the products, then go on to balance the remaining elements. a. Fe + O2 ÷ Fe2O3. Balancing Fe first, then O, gives: 2 Fe + 3/2 O2 ÷ Fe2O3. The best balanced equation contains the smallest whole numbers. ...
Stoichiometry - Normal Community High School Chemistry
... This number is called AVOGADRO’s number NA = 6.02 x 1023 particles/mol The mass of one mole of a substance is called MOLAR MASS symbolized by MM Units of MM are g/mol ...
... This number is called AVOGADRO’s number NA = 6.02 x 1023 particles/mol The mass of one mole of a substance is called MOLAR MASS symbolized by MM Units of MM are g/mol ...
2 - Chemistry
... gases. A small lamp fueled by methanol, CH3OH, is lighted in the container. How many mL of methanol (d=0.791 g/mL) will be consumed when the lamp goes out? • CH3OH(l) + O2(g) • CH3OH(l) + O2(g) CO2(g) + H2O(l) • 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(l) I recommend you to practice this balancin ...
... gases. A small lamp fueled by methanol, CH3OH, is lighted in the container. How many mL of methanol (d=0.791 g/mL) will be consumed when the lamp goes out? • CH3OH(l) + O2(g) • CH3OH(l) + O2(g) CO2(g) + H2O(l) • 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(l) I recommend you to practice this balancin ...
Chapter 4 - UCF Chemistry
... gases. A small lamp fueled by methanol, CH3OH, is lighted in the container. How many mL of methanol (d=0.791 g/mL) will be consumed when the lamp goes out? • CH3OH(l) + O2(g) • CH3OH(l) + O2(g) CO2(g) + H2O(l) • 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(l) I recommend you to practice this balancin ...
... gases. A small lamp fueled by methanol, CH3OH, is lighted in the container. How many mL of methanol (d=0.791 g/mL) will be consumed when the lamp goes out? • CH3OH(l) + O2(g) • CH3OH(l) + O2(g) CO2(g) + H2O(l) • 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(l) I recommend you to practice this balancin ...
chapter 20 - United International College
... reduction occurs. To complete the electrical circuit, the solutions must be connected by a conducting medium through which the cations and anions can move from one electrode compartment to the other. This requirement is satisfied by a salt bridge, which, in its simplest form, is an inverted U tube c ...
... reduction occurs. To complete the electrical circuit, the solutions must be connected by a conducting medium through which the cations and anions can move from one electrode compartment to the other. This requirement is satisfied by a salt bridge, which, in its simplest form, is an inverted U tube c ...
Stoichiometric Calculations
... about the relative volumes of gas reactants and products. For the next problem, we will not write out all of the ratios ahead of time. Sample Problem #4 How many liters of SO2 will be produced when 6 liters of O2 are reacted as shown below? CS2 (g) + 3 O2 (g)® CO2 (g) + 2 SO2 (g) ...
... about the relative volumes of gas reactants and products. For the next problem, we will not write out all of the ratios ahead of time. Sample Problem #4 How many liters of SO2 will be produced when 6 liters of O2 are reacted as shown below? CS2 (g) + 3 O2 (g)® CO2 (g) + 2 SO2 (g) ...
Announcements - University of Illinois Urbana
... removal, so reactor heats up until a steady state is reached • R(T) > G(T) (R(T) line above G(T) on graph): rate of heat generation < heat removal, so reactor cools off until a steady state is reached Slides courtesy of Prof M L Kraft, Chemical & Biomolecular Engr Dept, University of Illinois, Urban ...
... removal, so reactor heats up until a steady state is reached • R(T) > G(T) (R(T) line above G(T) on graph): rate of heat generation < heat removal, so reactor cools off until a steady state is reached Slides courtesy of Prof M L Kraft, Chemical & Biomolecular Engr Dept, University of Illinois, Urban ...
Topic 1 Quantitative Chemistry Answers - slider-dpchemistry-11
... A substance that cannot be divided into simpler, smaller substances. In an element, all the atoms have the same number of protons or electrons, but the number of neutrons may vary (more about this Topic 2) b) atom The smallest part of an element that can exist. An atom consists of an extremely tiny ...
... A substance that cannot be divided into simpler, smaller substances. In an element, all the atoms have the same number of protons or electrons, but the number of neutrons may vary (more about this Topic 2) b) atom The smallest part of an element that can exist. An atom consists of an extremely tiny ...
CHAPTER 9 Stoichiometry - Modern Chemistry Textbook
... burnt metal and observed a weight increase relative to the original tin. Curiously, this increase equaled the weight of the air that had rushed into the vessel. To Lavoisier, this did not support the idea of phlogiston escaping the burning material. Instead, it indicated that during combustion a por ...
... burnt metal and observed a weight increase relative to the original tin. Curiously, this increase equaled the weight of the air that had rushed into the vessel. To Lavoisier, this did not support the idea of phlogiston escaping the burning material. Instead, it indicated that during combustion a por ...
CHAPTER 9
... understand the laws of nature by observing, measuring, and performing experiments on the world around them. However, this scientific method was incorporated into chemistry slowly. Although early chemists experimented extensively, most considered measurement to be unimportant. This viewpoint hindered ...
... understand the laws of nature by observing, measuring, and performing experiments on the world around them. However, this scientific method was incorporated into chemistry slowly. Although early chemists experimented extensively, most considered measurement to be unimportant. This viewpoint hindered ...
© www.CHEMSHEETS.co.uk 17-Jul
... For most bonds (e.g. C-H, C-C, C=O, O-H, etc.) the value for the bond enthalpy is an average taken from a range of molecules as the exact value varies from compound to compound. For some bond enthalpies (e.g. H-H, H-Cl, O=O, etc) the value is exact as only one molecule contains that bond. ...
... For most bonds (e.g. C-H, C-C, C=O, O-H, etc.) the value for the bond enthalpy is an average taken from a range of molecules as the exact value varies from compound to compound. For some bond enthalpies (e.g. H-H, H-Cl, O=O, etc) the value is exact as only one molecule contains that bond. ...
Chapter 1: Matter and Measurements
... (a) “Compounds containing carbon atoms are molecular” is usually true. Carbon, being a nonmetal can combine with other non-metals to form molecular compounds such as those mentioned in Section 2.4 (indeed, a whole field of chemistry, called organic chemistry, is dedicated to the study of such compou ...
... (a) “Compounds containing carbon atoms are molecular” is usually true. Carbon, being a nonmetal can combine with other non-metals to form molecular compounds such as those mentioned in Section 2.4 (indeed, a whole field of chemistry, called organic chemistry, is dedicated to the study of such compou ...
File
... entropy values is: ΔSorxn = ΣnpSoproducts ΣnrSoreactants This equation works because entropy is a state function of the system (it is not pathwaydependent). Because of this, one can manipulate chemical reactions with known Svalues to determine S for a different reaction. The entropy change for ...
... entropy values is: ΔSorxn = ΣnpSoproducts ΣnrSoreactants This equation works because entropy is a state function of the system (it is not pathwaydependent). Because of this, one can manipulate chemical reactions with known Svalues to determine S for a different reaction. The entropy change for ...
CHAPTER SIXTEEN SPONTANEITY, ENTROPY, AND FREE
... Note that these substances are not in the solid state, but are in the aqueous state; water molecules are also present. There is an apparent increase in ordering when these ions are placed in water as compared to the separated state. The hydrating water molecules must be in a highly ordered arrangeme ...
... Note that these substances are not in the solid state, but are in the aqueous state; water molecules are also present. There is an apparent increase in ordering when these ions are placed in water as compared to the separated state. The hydrating water molecules must be in a highly ordered arrangeme ...
IB Chemistry Online SAQ_Ans
... unstable in higher levels and rapidly emit radiation and fall back into lower energy levels. As the energy levels are fixed, the energy lost between any higher level and a lower level is also of a certain fixed value so the radiation emitted will only have certain fixed frequencies (i.e. specific co ...
... unstable in higher levels and rapidly emit radiation and fall back into lower energy levels. As the energy levels are fixed, the energy lost between any higher level and a lower level is also of a certain fixed value so the radiation emitted will only have certain fixed frequencies (i.e. specific co ...
SCH3U: Final Exam Review Note: These questions a
... b) H3PO2(aq) c) H2SO3(aq) d) HIO3(aq) e) HBrO4(aq) 51. Write the chemical formula of each acid. a) carbonic acid b) hyponitrous acid c) sulfurous acid d) hydrocyanic acid e) perchloric acid 52. What are two major flaws with the Arrhenius definition of an acid and a base? Explain how the Brønsted-Low ...
... b) H3PO2(aq) c) H2SO3(aq) d) HIO3(aq) e) HBrO4(aq) 51. Write the chemical formula of each acid. a) carbonic acid b) hyponitrous acid c) sulfurous acid d) hydrocyanic acid e) perchloric acid 52. What are two major flaws with the Arrhenius definition of an acid and a base? Explain how the Brønsted-Low ...
Chapter 8 PowerPoint - Southeast Online
... More Making Pancakes • Let’s now assume that as we are making pancakes, we spill some of the batter, burn a pancake, drop one on the floor, or other uncontrollable events happen so that we only make 11 pancakes. The actual amount of product made in a chemical reaction is called the actual yield. • ...
... More Making Pancakes • Let’s now assume that as we are making pancakes, we spill some of the batter, burn a pancake, drop one on the floor, or other uncontrollable events happen so that we only make 11 pancakes. The actual amount of product made in a chemical reaction is called the actual yield. • ...
Chapter 1 - Solutions
... reactant in predicting the amount of product obtained in a reaction? Can there be a limiting reactant if only one reactant is present? The limiting reactant is the reactant that first runs out in a chemical reaction, therefore limiting the amount of products that can be formed. Excess reactants refe ...
... reactant in predicting the amount of product obtained in a reaction? Can there be a limiting reactant if only one reactant is present? The limiting reactant is the reactant that first runs out in a chemical reaction, therefore limiting the amount of products that can be formed. Excess reactants refe ...
Answers to Problem-Solving Practice Problems
... 3.4 (a) A Ca4 charge is unlikely because calcium is in Group 2A, the elements of which lose two electrons to form 2 ions. (b) Cr2 is possible because chromium is a transition metal ion that forms 2 and 3 ions. (c) Strontium is a Group 2A metal and forms 2 ions; thus, a Sr ion is highly unlike ...
... 3.4 (a) A Ca4 charge is unlikely because calcium is in Group 2A, the elements of which lose two electrons to form 2 ions. (b) Cr2 is possible because chromium is a transition metal ion that forms 2 and 3 ions. (c) Strontium is a Group 2A metal and forms 2 ions; thus, a Sr ion is highly unlike ...
The science of chemistry is concerned
... As you can see from the example, in a case where there is a limiting reagent, the initial amount of the limiting reagent must be used to calculate the amount of product formed. Using the initial amount of a reagent present in excess would be incorrect, because such a reagent is not entirely consumed ...
... As you can see from the example, in a case where there is a limiting reagent, the initial amount of the limiting reagent must be used to calculate the amount of product formed. Using the initial amount of a reagent present in excess would be incorrect, because such a reagent is not entirely consumed ...
SCH3U: Final Exam Review
... ____ iii. When the volume of a gas is decreased by a factor of 5, the temperature is decreased by a factor of 5. ____ iv. When the pressure of a gas is halved, the temperature is halved. ____ v. When the volume of a gas is increased by a factor of 5,the temperature is decreased by a factor of 5. B) ...
... ____ iii. When the volume of a gas is decreased by a factor of 5, the temperature is decreased by a factor of 5. ____ iv. When the pressure of a gas is halved, the temperature is halved. ____ v. When the volume of a gas is increased by a factor of 5,the temperature is decreased by a factor of 5. B) ...
Solutions - ChemConnections
... ∆GE = !RT ln K = ∆HE ! T∆SE; HX(aq) ⇌ H+(aq) + X−(aq) Ka reaction; the value of Ka for HF is less than one, while the other hydrogen halide acids have Ka > 1. In terms of ∆GE, HF must have a positive ∆G orxn value, while the other HX acids have ∆G°rxn < 0. The reason for the sign change in the Ka va ...
... ∆GE = !RT ln K = ∆HE ! T∆SE; HX(aq) ⇌ H+(aq) + X−(aq) Ka reaction; the value of Ka for HF is less than one, while the other hydrogen halide acids have Ka > 1. In terms of ∆GE, HF must have a positive ∆G orxn value, while the other HX acids have ∆G°rxn < 0. The reason for the sign change in the Ka va ...
Chapter 4 Chemical Quantities and Aqueous Reactions
... Electrolytes and Nonelectrolytes • in order to conduct electricity, a material must have charged particles that are able to flow • electrolyte solutions all contain ions dissolved in the water – ionic compounds are electrolytes because they all dissociate into their ions when they dissolve ...
... Electrolytes and Nonelectrolytes • in order to conduct electricity, a material must have charged particles that are able to flow • electrolyte solutions all contain ions dissolved in the water – ionic compounds are electrolytes because they all dissociate into their ions when they dissolve ...