Answer:
3.74 atmospheres
Explanation:
If the temperature is constant, then the formula is
V*P = V1 * P1
V = 22.6 L
P = 1.67 atm
V1 = 10.0 L
P1 = ??
=============
22.6 * 1.67 = 10 * P1
37.742 = 10 * P1
37.742/10 = P1
P1 = 3.742
Note there are 3 sig digs in each given, so the answer should be
P1 = 3.74 atmospheres
Answer:
Given that,
Molarity of molecule X = 0.16M
Molarity = no.of moles / volume of solution in Litres
So, rearranging the equation for no.of moles = Molarity * volume of solution in Litres
substituting the values,
no.of moles = 0.16M* 1 L = 0.16 moles
osmolarity is the no.of osmoles per litre of a solution. osmolarity refers to concentration in terms of moles per litre of the solution.
since molecule X dissociates in to 4 ions when dissolved in aqueous solution ,
1 mole of X forms 4 mol of paticles
so, 1 mole of X = 4 osmoles
Therefor, 0.16 moles of X = 0.16 * 4 = 0.64 osmoles
osmolarity = osmoles / L
= 0.64 / 1L = 0.64 osmoles / L
Explanation:
Answer: 8 moles of hydrogen reacts with 1 mole of sulfur.
Explanation: We are given a balanced chemical equation:
By Stoichiometry, it is said that
8 moles of Hydrogen gas reacts with 1 mole of sulfur to produce 8 moles of hydrogen sulfide.
Mole ratio of reactants = Hydrogen : Sulfur = 8 : 1
CHEM 1021 CHAPTER 1 (8 <span>th </span><span>Edition) MATTER, ENERGY, AND MEASUREMENT </span><span>AND APPENDIX I AND II </span><span>Note: </span><span>This is an optional study guide. </span><span>This study is not an exhaustive list of questions that </span><span>could appear on quizzes or exams. </span><span>These are sample questions that may or may not be </span><span>used on a quiz or midterm exam or final exam. </span><span>Other questions that are not found on this </span><span>study guide will be on actual quizzes, midterm and final exams. </span>It is important to do all ofthe homework problems that are in your Chem 1021 lecture text in addition to the<span>questions in this study guide. </span><span>Make sure that you do all of the Chemical Connections </span><span>homework questions that have assigned. </span><span>Learn the basic principles and then be prepared </span><span>to apply the principles to problems that you have not seen before. </span><span>The following questions are to be answered from CHEM 1021 CHAPTER 1 (8 </span><span>th </span>Edition) AND<span>APPENDIX I AND II LECTURE TEXT, LECTURE NOTES AND LECTURE SLIDES. </span><span>1. </span><span>What is matter? </span><span>2. </span><span>What is chemistry? </span><span>3. </span><span>What is the difference between a physical change and a chemical change? </span><span>Give an </span><span>example of both and explain your answer. </span><span>4. </span><span>What is the difference between a physical change and a chemical change? </span><span>Give an </span><span>example of both and explain your answer. </span><span>What are the three physical states of matter? </span><span>5. </span><span>What is the difference between a physical property and a chemical property? </span>Give an example of both and explain your answer.<span>6. </span><span>What is the scientific method? </span><span>What are the basic components of the scientific method? </span><span>7. </span><span>What are the differences between a hypothesis, theory</span>
<span>Electrons move from higher energy states to lower energy states</span>
