Molarity equation - 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...

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...

CHEM120 Week 8: Exam 3 (Units 5, 6, and 7) – With 100% Correct Answers- Download To Score An A+ 1. Question: (TCO 7) (a, 5 pts) Given that the molar mass of H3PO4 is 97.994 grams, determine t he number of grams of H3PO4 needed to prepare 0.25L of a 0.2M H3PO4 solution. Show your work. (b, 5 pts) What volume, in Liters, of a 0.2 M H3PO4 solution can be prepared by diluting 50 mL of a 5M H3PO4 solution? Show your work. (Pts. : 10) A. Molarity = moles of solute/liters of solution moles of solute ...

Things to Memorize for IB Chem HL 100% Correct Percentage Yeild actual yield/theoretical yield x 100 Avogadro's Law for gases One mole of any gas occupies 22.7 L at STP Ideal Gas Law PV=nRT (n is equal to the number of moles of the substance and R is the gas constant 0.082 or 8.314) Molarity equation moles of solute/liters of solution Dilution M1V1=M2V2 Hydrogen Emission Spectrum Color lines indicate the wavelengths of light that are released Balmer series A set of spec...

Final Certification for CHEM 1212 Exam 2 Q&A What is Molarity and the units for molarity? - CORRECT ANSWER-M=moles of solute/liters of solution, units are mol/liter What is Molality and the units for molality? - CORRECT ANSWER-m= moles of solute/moles of solvent, units are mol/kg What is Mass Percentage or Weight Percent and the units for mass percentage or weight percent? - CORRECT ANSWER-Mass %= (mass of solute/total mass of solution) x 100 What is Mole Fraction and the units for...

Rf value correct answers Distance travelled by substance / distance travelled by solvent Thin lens equation correct answers 1/f = 1/O + 1/I Ohm's law correct answers V=IR Volts Index of refraction correct answers n=c/v Energy of a photon correct answers E=hf Joules Work correct answers W = force x distance Joules Ideal Gas Law Equation and assumptions correct answers PV=nRT Intermolecular forces are negligible Individual molecular volume is negligible STP conditions ...

BioChem 210 Module 2 Exam - Portage Learning 1. The pH of a solution of 0.0010 M NaOH is:: 11 (Kw=[H+][OH-] = 1.0 x 10-14; [H+][0.0010] = 1.0 x 10-14 [H+]=1.0 x 10-11; pH=-log[1.0 x 10- 11]=11) 2. Water is a unique molecule. Which of the following contributes to water's unique place in the chemical world?: All of the answers are correct 3. The bent shape of water is due to ______________.: The unshared electron pairs on the oxygen atom 4. Which diagrams correctly represent ...

Sulphur and its Compounds Questions and Answers Questions 1.Sulphur is extracted from underground deposits by a process in which three concentric pipes are sunk down to the deposits as shown below 1.a)Name the process represented above b)What is passed down through pipe J? c)Name the two allotropes of sulphur d) Commercial sulphuric acid has a density of 1.8gcm3. Calculate the molarity of this acid. Determine the volume of commercial acid in(a) above that can be used to prepare...

Gen Chem Equations to study for the ACS Exam 28 Questions with Verified Answers Rydberg Equation for Hydrogen - CORRECT ANSWER Speed of Light/Wavelength/Frequency Equation - CORRECT ANSWER Speed of Light (3 x 10^8) Energy of a Single Quantum - CORRECT ANSWER E = hv v = frequency (c/λ) h = Planck's Constant (6.26 x 10^-34) Photoelectric Effect Equation - CORRECT ANSWER hv = KE + W h = Planck's Constant (6.26 x 10^-34) W = binding energy of the electron Electrostatic E...