Molarity of ions - Study guides, Class notes & Summaries

Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT OF 100) Portage learning (Latest Update) MODULE 1 EXAM Question 1 Click this link to access the Periodic Table. This may be helpful throughout the exam. 1. Convert 845.3 to exponential form and explain your answer. 2. Convert 3.21 x 10-5 to ordinary form and explain your answer. 1. Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places = 8.453 x 102 2. Convert 3.21 x 10-5 = negative exponent = smalle...

1. A solution is prepared by dissolving 50 g of KCl (74.6 g/mol) to a volume of 1 L. What is the molarity of this solution? 2. You prepare a solution by dissolving 20 g of NaCl to a volume of 350 mL in water. What is the mass/volume % concentration of this solution? 3. When the following reaction goes in the forward direction, what is the base? 4. You are preparing a buffered solution. So far, your solution contains H2PO4- ions, what would you add to this solution to prepare your buffer sy...

Rio Salado CHM 130 Midterm Objectives with Complete Solutions What is the definition of an element in chemistry? An element is a pure substance consisting of only one type of atom. How is a compound different from a mixture? A compound is a substance composed of two or more different elements chemically combined, while a mixture is a combination of two or more substances that are not chemically bonded. What does the term “molarity” refer to in chemistry? Molarity refers t...

describe the basic functions all life forms must accomplish -response to environmental stimuli & maintain homeostasis -uptake and processing of nutrients/energy -regulation -growth and reproduction compare and contrast eukaryotic and prokaryotic cell types Prokaryotes: -circular chromosomes, no nucleus, no organelles, 3.5 bya -DNA concentrated in nucleoid Eukaryotes: -linear chromosomes, nucleus, organelles, 1.5 bya -DNA concentrated in nucleus Both: -cellular function takes p...

The outermost electrons - Answer-valence electrons the shell the outermost electrons occupy - Answer-Valence shell Electron pairs in an electron dot structure that are not participating in a chemical bond - Answernon-bonding pair the electric force of attraction between two oppositely charged ions - Answer-ionic bond The fluid hold of electrons which holds the positively charged metal ions together - Answer-metallic bond An electrical attraction in which atoms are held together by their mu...

Chapter 3: Chemical Reactions 1. Which of the following cannot be determined from a balanced chemical equation? a. b. c. d. e. ANSWER: POINTS: TOPICS: OTHER: The number of molecules of reactants and products. The number of atoms of each element reacting. The number of moles of reactants and products. The relative mass of each reactant and product. Whether the reaction will proceed as written. e 1 3.1 Chemical Equations Comprehension 2. In the reaction given below, if 12 moles of aluminu...

What atoms follow the Duet role? Li and Na What type of bonding takes place between N and F? covalent Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:08 / 0:15 Full screen How many electrons is an octet? 8 To draw the Lewis Structure of the polyatomic ion CIO2, you would have to ________ those in the structures of Cl, O, O and O. add one electron to The correct Lewis structure for a molecule of the compound ...

AP Biology - The Chemistry of Life Latest Update Already Passed 4 classes of organic molecules 1. carbohydrates 2. proteins 3. lipids 4. nucleic acids acid substance that increases the molarity of hydrogen ions in a solution, decreasing pH (simultaneously diminishes the molarity of hydroxide ions, because product of the molarities of both is always 10^-14) adhesion the tendency of water molecules to stick to other substances; enables transportation of H2O against gravity in vascular...

What is the total concentration of ions (in mol/L) in a solution obtained by dissolving 3.51 g of Cr(NO3)3 in enough water to make 351 mL of solution? (Molar mass of Cr(NO3)3: 238.01 g/mol) - Ans: 0.168 +/- 1% What is the concentration of sodium ions (in mol/L) in a solution obtained by mixing 90.5 mL of 0.181 M solution of Na2SO4 and 65.5 mL of 0.147 M solution of Na3PO4? Assume that volumes are additive. - Ans: 0.395 Which of the following molecules is polar? - Ans: IF5 What is the ...

Ionic Character correct answersdifference between in electronegativity between two atoms cation correct answerspositively charged ions anion correct answersnegatively charged ions Which organic compound smells like fruit? correct answersesters - mostly found in fruits Compound correct answerssubstance containing two or more chemical elements held together by chemical bonds What type of reaction is the process of fermentation? correct answersexothermic (converting sugar into alcoho...