Chemistry, 12.07.2019 04:30 boyancecristina

"what is the difference between a physical change and a chemical change? give an example of both and explain your answer. what are the three physical states of matter? "

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CHEM 1021 CHAPTER 1 (8 th Edition) MATTER, ENERGY, AND MEASUREMENT AND APPENDIX I AND II Note: This is an optional study guide. This study is not an exhaustive list of questions that could appear on quizzes or exams. These are sample questions that may or may not be used on a quiz or midterm exam or final exam. Other questions that are not found on this study guide will be on actual quizzes, midterm and final exams. It is important to do all ofthe homework problems that are in your Chem 1021 lecture text in addition to thequestions in this study guide. Make sure that you do all of the Chemical Connections homework questions that have assigned. Learn the basic principles and then be prepared to apply the principles to problems that you have not seen before. The following questions are to be answered from CHEM 1021 CHAPTER 1 (8 th Edition) ANDAPPENDIX I AND II LECTURE TEXT, LECTURE NOTES AND LECTURE SLIDES. 1. What is matter? 2. What is chemistry? 3. What is the difference between a physical change and a chemical change? Give an example of both and explain your answer. 4. What is the difference between a physical change and a chemical change? Give an example of both and explain your answer. What are the three physical states of matter? 5. What is the difference between a physical property and a chemical property? Give an example of both and explain your answer.6. What is the scientific method? What are the basic components of the scientific method? 7. What are the differences between a hypothesis, theory

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the dissociation of nickel hydroxide is follows:

$ni(oh)_2 > ni^2^+ + 2 oh^-$

$ksp for no(oh)2 = 5.5 * 10^-^1^6$

$5.5 * 10^-^1^6 = s * (2 s)^2 = 4 s^3$

$s^3 = 137.5 * 10^-^1^8$

$s = 5.14 * 10^-^6 = [oh^-]$

the concentration of hydroxide ion is

$5.14 * 10^-^6 = [oh^-]$

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

$k = [ ni^2^+] * [oh^-]^2$

$6.1 * 10^-^1^6 = [ ni^2] * [5.14 * 10^-^6]^2$

$[ ni^2^+] = 0.23 * 10^-^4 mol /l$

thus, concentration of ni is 0.23 * 10^-^4 mol /l

Answer from: Quest

You can look it up online and some images should pop up

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