Atoms to moles - 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...

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...

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...

RNAS C Practice Test Review 437 Questions with Verified Answers A capacitor and resisitor in parallel - CORRECT ANSWER will have same voltage across since in parallel. if in series, voltage drops would occur they can be treated together If the absolute pressure of a gas is increased from 3 atm to 4 atm at constant volume, then the absolute temperature of the gas will increase by: A. 25%. B. 33%. C. 67%. D. 75% - CORRECT ANSWER B. Assuming the validity of the Ideal-Gas law, PV = n...

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 ...

A piece of shiny metal was found pm the edge of the road. The metal was put on a balance and had a mass of 1.325g. The volume was determined by difference when the metal was placed into a 20.00 ml column of oil, which was displaced to 34.97ml. correct answersa) volume=14.97ml b) 0.08851 possible metal density: aluminum, zinc, lead, uranium correct answersunknown light chocolate melts at 88.2 degrees f. What would this temperature be if reported on both the Celsius scale and the Kelvin sca...

Stoichiometry Correct Answer The study of quantities of materials consumed and produced in chemical reactions What is the formula weight? Correct Answer Average atomic weights in amu. It is the weight of 1 formula unit What is the molecular weight? Correct Answer Average atomic weights in amu. It is the weight of 1 molecular unit Percent Composition Correct Answer Relative amount of an element in a compound/molecule What is 1 mol of particles equivalent to? Correct Answer 6.02x10^23 ...

Edexcel iGCSE Chemistry, question and answer with rated solution Experiment for Diffusion? 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? 1) Put a coloured substance in a solvent e.g food colouring in water. 2) Over the time, the colour le...

Chem 111 General Chemistry 1 Practice Test #3 (Chapter 6 & 7) 50 Questions with Verified Answers 1. Which one of the following statements about balanced equations is TRUE? A reaction is balanced by A) multiplying by suitable coefficients B) changing the formula of the molecule C) changing the charge of an ion D) rearranging atoms in a molecule - CORRECT ANSWER A) multiplying by suitable coefficients 2. What is the stoichiometric coefficient for oxygen when the following equati...