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Chemistry 12th Edition answers to Chapter 6 - The Periodic Table - 6 Assessment - Page 36 including work step by step written by community members like you. Explain why the flow of a compressed gas must be controlled for practical and safe use. A radio station has a frequency of Chapter 6 questions and answers will have to be obtained from the course materials provided by the instructor. Calculate the mass of the sample. Determine why producing 1 million fran-cium atoms per second is not enough to make measurements, such as density of boiling point.
Iodine turning a piece of bread black. Answer keys for homework assignments are listed below. Cornell Notes. Expresses the average rate of loss of a chemistry matter and change chapter 7 assessment answers a. Section 6. Dmitri Mendeleev 6. Eating and digesting cheese pizza. Elements that are good conductors of heat and electricity are metals. Chemistry Matter Change Chapter 13 Assessment Answer Key file : free craftsman manuals writing a position paper format tmaarcs tabeteststudyguide hickman animal diversity 6th edition java pocket guide robert liguori sample paper of maths for class 9 openoffice help guide canon imagerunner A dependent responding variable is the factor in an experiment that is purposely changed to test a hypothesis. Search Results Learn vocabulary, terms, and more with flashcards, games, and other study tools. Bookmark File PDF Chemistry Matter And Change Chapter 6 Assessment Answers Chemistry Matter And Change Chapter 6 Assessment Answers If you ally obsession such a referred chemistry matter and change chapter 6 assessment answers book that will pay for you worth, acquire the certainly best seller from us currently from several preferred authors.
The value of an extensive property depends upon the amount of matter being considered, whereas the value of an intensive property is the same regardless of the amount of matter being considered. Describe the development of the modern Explain your answer. Multiple Choice 1. Being extensive properties, both mass and volume are directly proportional to the amount of substance under study. Even one million atoms collected together as a solid are microscopic. Ch 1 — Introduction to Chemistry. Do not depend on answer keys to do your homework. A horizontal row of elements in the periodic table is called a n period. Enthalpy: Chemical Change at Constant Pressure 3. Henry Moseley Each textbook chapter has six study guide pages of questions and exercises for you to complete as you read the text. When an atom loses an electron, it forms a n a. Chemistry Chapter 6 Assessment. Chemistry is the study of matter and its properties. Chemistry Apps. A sample of aluminum is placed in a mL graduated cylinder containing What does each line in an atomic emission spectrum represent?
Question 4. Write the expression for the equilibrium constant for each of the following reactions Answer: Question 5. Find the value of Kc for each of the following equilibria from the value of K Answer: Question 6. What is Kc for the reverse reaction? Answer: Question 7. Explain why pure liquids and solids can be ignored while writing the value of equilibrium constants. Answer: This is because molar concentration of a pine solid or liquid is independent of the amount present. Since density of pure liquid or solid is fixed and molar mass is also fixed. Therefore molar concentration are constant. Question 8. Reaction between nitrogen and oxygen takes place as follows: If a mixture of 0. Answer: Let x moles of N2 g take part in the reaction. The molar concentration per litre of different species before the reaction and at the equilibrium point is: The value of equilibrium constant 2.
This means that only small amounts of reactants have reacted. Therefore, is extremely small and can be omitted as far as the reactants are concerned. Question 9. Nitric oxide reacts with bromine and gives nitrosyl bromide as per reaction given below: When 0. Determine the compositions of the equilibrium mixture. Answer: The balanced chemical equation for the reaction is: According to the equation, 2 moles of NO g react with 1 mole of Br2 g to form 2 moles of NOBr g. The composition of the equilibrium mixture can be calculated as follows: No.
Answer: Question A sample of HI g is placed in a flask at a pressure of 0. At equilibrium partial pressure of HI g is 0. What is Kp for the given equilibrium? A mixture of 1. At this temperature, the equilibrium constant Kc for the reaction Is this reaction at equilibrium? If not, what is the direction of net reaction? The equilibrium constant expression for a gas reaction is, Write the balanced chemical equation corresponding to this expression. Answer: Balanced chemical equation for the reaction is 4 Question If l mole of H20 and 1 mole of CO are taken in a 10 litre vessel and heated to K, at equilibrium point 40 percent of water by mass reacts with carbon monoxide according to equation.
Calculate the equilibrium constant for the reaction. Thus, the molar cone, per litre of the reactants and products before the reaction and at the equilibrium point are as follows: Question What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0. What is the equilibrium concentration ok C2H6 when it is placed in a flask at 4 atm pressure,and allowed to come to equilibrium.
Note that water is not in excess and is not a solvent in this reaction. Calculate the equilibrium constant. Has equilibrium been reached? Answer: Since Qc is less than Kc this means that the equilibrium has not been reached. The reactants are still taking part in the reaction to form the products. Question A sample of pure PCl5 was introduced into an evacuated vessel at K.
After equilibrium was reached, the concentration of PCl5 was found to be 0. If Kc is 8. Therefore, partial pressure of C02 will decrease while that of CO will increase so that the equilibrium may be attained again. Let p atm be the decrease in the partial pressure of C Therefore, the partial pressure of CO will increase by the same magnitude i. Bromine monochloride BrCl decomposes into bromine and chlorine and reaches the equilibrium: The value of Kc is 32 at K.
If initially pure BrCl is present at a concentration of 3. Answer: Let x moles of BrCl decompose in order to attain the equilibrium. The initial molar concentration and the molar concentration at equilibrium point of different species may be represented as follows: Question At K and 1 atmosphere pressure, a gaseous mixture of CO and C02 in equilibrium with solid carbon has Calculate Kc for the reaction at the above temperature. Does the number of moles of reaction products increase, decrease or remain same when each of the following equilibria is subjected to a decrease in pressure bp increasing the volume?
Answer: i Pressure will increase in the forward reaction and number of moles of products will increase. Which of the following reactions will get affected by increase in pressure? Also mention whether the change will cause the reaction to go to the right or left direction. With the exception of the reaction 1 ; all the reamaining five reactions will get affected by increasing the pressure. The equilibrium constant for the following reaction is 1. Find the equilibrium pressure of all gases if Hydrogen gas is obtained from the natural gas by partial oxidation with steam as per the following endothermic reaction: Write the expression for Kp for the above reaction How will the value of Kp and composition of equilibrium mixture be affected by: i increasing the pressure, ii increasing the temperature, iii using a catalyst?
Answer: The expression for Kp for the reaction is: i By increasing the pressure, the number of moles per unit volume will increase. In order to decrease the same, the equilibrium gets shifted to the left or in the backward direction. As a result, more of reactants will be formed and the value of Kp will decrease. Therefore, the equilibrium gets shifted to the right and the value of Kp will increase. But it will be attained more quickly. At K, the equilibrium constant Kc for the decomposition of phosphorus pentachloride PCl5 is 8.
Answer: c i By adding more of PCl5, value of Kc will remain constant because there is no change in temperature. Therefore, the value of equilibrium constant will increase. The first stage of two stage reaction involves the formation of CO and H2 In second stage, CO formed in first stage is reacted with more steam in water gas shift reaction. Predict which of the following will have appreciable concentration of reactants and products: Answer: Following conclusions can be drawn from the values of Kc. What is meant by conjugate acid-base pair?
Which of the following are Lewis Acids? What will be the conjugate bases for the Bronsted acids? For each case, give the corresponding conjugate acid and base. It is a Lewis acid. The concentration of hydrogen ions in a sample of soft drink is 3. What is the pH value? The pH of a sample of vinegar is 3. Calculate the concentration of hydrogen ion in it. The ionization constant of phenol is 1. What is the concentration of phenolate ion in 0. What will be its degree of ionization if the solution is also 0. The-first ionization constant of H2S is 9. Calculate the concentration of HS— ions in its 0. If the second dissociation constant of H2S is 1.
The ionization constant of acetic acid is 1. Calculate the degree of dissociation of acetic acid in its 0. Calculate the concentration of acetate ions in the solution and its pH. It has been found that the pH of a 0. Calculate the concentration of the anion, the ionization constant of the acid and its PKa. Assuming complete dissociation, calculate the pH of the following solutions: a 0. Calculate the pH of the following solutions: a 2g ofTlOH dissolved in water to give 2 litre of the solution b 0. The degree of ionization of a 0. Calculate the pH of the solution and the PKa of bromoacetic acid. The pH of0. Calculate the ionization constant and PKb. What is meant by equilibrium? Answer: Equilibrium is a state at which rate of forwarding reaction is equal to the rate of backward reaction.
Question 4. Write the expression for the equilibrium constant for each of the following reactions Answer: Question 5. Find the value of Kc for each of the following equilibria from the value of K Answer: Question 6. What is Kc for the reverse reaction? Answer: Question 7. Explain why pure liquids and solids can be ignored while writing the value of equilibrium constants. Answer: This is because molar concentration of a pine solid or liquid is independent of the amount present. Since density of pure liquid or solid is fixed and molar mass is also fixed. Therefore molar concentration are constant. Question 8. Reaction between nitrogen and oxygen takes place as follows: If a mixture of 0. Answer: Let x moles of N2 g take part in the reaction. The molar concentration per litre of different species before the reaction and at the equilibrium point is: The value of equilibrium constant 2.
This means that only small amounts of reactants have reacted. Therefore, is extremely small and can be omitted as far as the reactants are concerned. Question 9. Nitric oxide reacts with bromine and gives nitrosyl bromide as per reaction given below: When 0. Determine the compositions of the equilibrium mixture.
Answer: The balanced chemical equation for the reaction is: According to the equation, 2 moles of NO g react with 1 mole of Br2 g to form 2 moles of NOBr g. The composition of the equilibrium mixture can be calculated as follows: No. Answer: Question A sample of HI g is placed in a flask at a pressure of 0. At equilibrium partial pressure of HI g is 0. What is Kp for the given equilibrium? A mixture of 1. At this temperature, the equilibrium constant Kc for the reaction Is this reaction at equilibrium? If not, what is the direction of net reaction? The equilibrium constant expression for a gas reaction is, Write the balanced chemical equation corresponding to this expression.
Answer: Balanced chemical equation for the reaction is 4 Question If l mole of H20 and 1 mole of CO are taken in a 10 litre vessel and heated to K, at equilibrium point 40 percent of water by mass reacts with carbon monoxide according to equation. Calculate the equilibrium constant for the reaction. Thus, the molar cone, per litre of the reactants and products before the reaction and at the equilibrium point are as follows: Question What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0. What is the equilibrium concentration ok C2H6 when it is placed in a flask at 4 atm pressure,and allowed to come to equilibrium. Note that water is not in excess and is not a solvent in this reaction.
Calculate the equilibrium constant. Has equilibrium been reached? Answer: Since Qc is less than Kc this means that the equilibrium has not been reached. The reactants are still taking part in the reaction to form the products. Question A sample of pure PCl5 was introduced into an evacuated vessel at K. After equilibrium was reached, the concentration of PCl5 was found to be 0. If Kc is 8. Therefore, partial pressure of C02 will decrease while that of CO will increase so that the equilibrium may be attained again. Let p atm be the decrease in the partial pressure of C Therefore, the partial pressure of CO will increase by the same magnitude i. Bromine monochloride BrCl decomposes into bromine and chlorine and reaches the equilibrium: The value of Kc is 32 at K.
If initially pure BrCl is present at a concentration of 3. Answer: Let x moles of BrCl decompose in order to attain the equilibrium. The initial molar concentration and the molar concentration at equilibrium point of different species may be represented as follows: Question At K and 1 atmosphere pressure, a gaseous mixture of CO and C02 in equilibrium with solid carbon has Calculate Kc for the reaction at the above temperature. Does the number of moles of reaction products increase, decrease or remain same when each of the following equilibria is subjected to a decrease in pressure bp increasing the volume?
Answer: i Pressure will increase in the forward reaction and number of moles of products will increase. Which of the following reactions will get affected by increase in pressure? Also mention whether the change will cause the reaction to go to the right or left direction. With the exception of the reaction 1 ; all the reamaining five reactions will get affected by increasing the pressure. The equilibrium constant for the following reaction is 1. Find the equilibrium pressure of all gases if Hydrogen gas is obtained from the natural gas by partial oxidation with steam as per the following endothermic reaction: Write the expression for Kp for the above reaction How will the value of Kp and composition of equilibrium mixture be affected by: i increasing the pressure, ii increasing the temperature, iii using a catalyst?
Answer: The expression for Kp for the reaction is: i By increasing the pressure, the number of moles per unit volume will increase. In order to decrease the same, the equilibrium gets shifted to the left or in the backward direction. As a result, more of reactants will be formed and the value of Kp will decrease. Therefore, the equilibrium gets shifted to the right and the value of Kp will increase. But it will be attained more quickly. At K, the equilibrium constant Kc for the decomposition of phosphorus pentachloride PCl5 is 8. Answer: c i By adding more of PCl5, value of Kc will remain constant because there is no change in temperature.
Therefore, the value of equilibrium constant will increase. The first stage of two stage reaction involves the formation of CO and H2 In second stage, CO formed in first stage is reacted with more steam in water gas shift reaction. Predict which of the following will have appreciable concentration of reactants and products: Answer: Following conclusions can be drawn from the values of Kc. What is meant by conjugate acid-base pair? Which of the following are Lewis Acids? What will be the conjugate bases for the Bronsted acids? For each case, give the corresponding conjugate acid and base. It is a Lewis acid. The concentration of hydrogen ions in a sample of soft drink is 3. What is the pH value? The pH of a sample of vinegar is 3. Calculate the concentration of hydrogen ion in it. The ionization constant of phenol is 1. What is the concentration of phenolate ion in 0. What will be its degree of ionization if the solution is also 0.
The-first ionization constant of H2S is 9. Calculate the concentration of HS— ions in its 0. If the second dissociation constant of H2S is 1. The ionization constant of acetic acid is 1. Calculate the degree of dissociation of acetic acid in its 0. Calculate the concentration of acetate ions in the solution and its pH. It has been found that the pH of a 0. Calculate the concentration of the anion, the ionization constant of the acid and its PKa. Assuming complete dissociation, calculate the pH of the following solutions: a 0. Calculate the pH of the following solutions: a 2g ofTlOH dissolved in water to give 2 litre of the solution b 0. The degree of ionization of a 0. Calculate the pH of the solution and the PKa of bromoacetic acid.
The pH of0. Calculate the ionization constant and PKb. What is meant by equilibrium? Answer: Equilibrium is a state at which rate of forwarding reaction is equal to the rate of backward reaction. Question 2.
This book more than covers a standard 2-semester college physics curriculum - from mechanics to thermal to optics to modern, including up to date information on the latest areas of active research. Which of the following types of radiation has the longest wavelength? For example argon Ar, atomic mass Andersen describes atomic structure and tours the periodic table. It also deals with atomic models like the Bohr model of the atom, isotopes, and mass spectrometry.
Base your answers to questions 2 and 3 on the information below. Also an "alien" atom in one of the interstitials in a structure. All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various schools. Please fill this form, we will try to respond as soon as possible. An isotope is radioactive if it has an unstable nucleus.
You have remained in right site to begin getting this info. In this atom worksheet, students review the subatomic particles, the scientists associated with the atomic theory, and the periodic table. Periodicity is the trend of chemical and physical properties across a period or down a group of elements; Atomic Radius decreases across a period as there are more protons so the nuclear charge is greater and pulls the electrons in more. The average atomic mass is the weighted average of all the isotopes of an element. C, N, Al e. Describe how and why the atomic model has. Protons Neutrons and Electrons Practice Worksheet Answers Name of element element symbol mass number atomic number protons neutrons electrons boron b 11 5 5 6 5 24 11 31 37 sodium gallium y 89 copper 39 29 tc 98 pb 35 43 ytterbium. This is an enormously simple means to specifically acquire guide by on-line.
These will appear in both exam papers, and at both Tiers. This includes safe and reliable practical experiments, interactive simulations, games and problem solving activities. Li, Na, K c. General Atomic Structure presentation. Periodic trends. Glycolipids purple. Thomson produced a visible beam in a cathode ray tube.
Chapter 3 - Classification of Elements and Periodicity in Properties. Periodicity and Atomic Structure Answers to problem club questions in orange. Theme: Atomic structure and bonding. This activity promotes good discussion between students and supports meaning making of key. If you get it wrong the site has you do the electron configuration to see why. Each of the elements in the periodic table is classified according to its atomic number, which is the number of protons in that element's nucleus. For an atom to be neutral, the number of protons must equal the number of neutrons. Hydrogen II. This is a compilation of several videos covering all areas of Chemical bonding and Structure.
This text covers atomic structure and periodicity. The real development in the periodic table took place after the development of Mendeleev periodic table. Rather than enjoying a good book with a cup of tea in the afternoon,. As you have learned, the electron configurations of the elements explain the otherwise peculiar shape of the periodic table. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery. Atomic size decreases from left to right, because the addition of. Refer to the U-tube pictures above when answering the questions below. Atomic Structure Power Point Notes sat. Explain your answer to Question Why does the atomic radius change? We are going to begin discussing nuclear fusion and nuclear fission, radioactive isotopes and nuclear equations. Chapter 7 Notes Atomic Structure and Periodicity. Atomic radii decrease, however, as one moves from left to right, across the Periodic Table.
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