Pentane - Study guides, Class notes & Summaries

What molality of pentane solution is obtained by dissolving 5.0 g pentane, C5H12, in 245.0 g hexane, C6H14? Enter your answer with two decimal places and no units. Molar mass pentane: 72.15 g/mol Molar mass hexane: 86.18 g/mol - 0.28 5 g pentane x (1 mol/ 72 g)= 0.069 mol pentane 245g > .245 kg hexane 0.069 mol/ .245= 0.28 If an aqueous CsCl solution is 7.28% CsCl (by mass) and has a density of 1.05 g/mL at 20.°C,what is the expected boiling point of the solution? Kb = 0.51°C/m for ...

Chapter 1 Carbon and Its Compounds CHECKPOINT PROBLEMS Practice Problem 1.1 a) S — 1s2 2s2 2p6 3s2 3p4 b) Cl — 1s2 2s2 2p6 3s2 3p5 c) Na+ — 1s2 2s2 2p6 1-2 Copyright © 2018 Nelson Education Limited Practice Problem 1.2 a) Count valence electrons. Build a basic bonding framework and account for electrons used. Add remaining electrons and check for formal charges. The molecule has a lone pair on the nitrogen. All other electrons are bonding electrons. b) Count valence electrons. Build a bas...

Chemistry 104 Organic Chemistry- Exam #1; Questions and Answers 100% Solved Alkane Correct answer-Contains only single bonds. Saturated Hydrocarbons Correct answer-Contain the largest possible number of hydrogen atoms per carbon atom (alkanes). Prefixes for alkanes Correct answer-Methane (1 C) Ethane (2 C's) Propane (3 C's) Butane (4 C's) Pentane (5 C's) Hexane (6 C's) Heptane (7 C's) Octane (8 C's) Nonane (9 C's) Decane (10 C'

AAMC MCAT Practice Exam 2 Questions and Answers 2024 C/P: What expression gives the amount of light energy (in J per photon) that is converted to other forms between the fluorescence excitation and emission events? "intensity of fluorescence emission at 440 nm excitation at 360 nm) was monitored for 20 minutes" A) (6.62 × 10-34) × (3.0 × 108) B) (6.62 × 10-34) × (3.0 × 108) × (360 × 10-9) C) (6.62 × 10-34) × (3.0 × 108) × [1 / (360 × 10-9) - 1 / (440 × 10-9)] D) (6.62 × ...

Title: Bonding and Properties Purpose: Study the infrared spectra and physical properties of molecules to determine what kinds of intra-molecular bonds are present within the molecules and what kinds of intermolecular bonds are present between the molecules. Procedure: 1. Add potassium chloride (ionic) to water in a test tube. Shake tube so potassium chloride dissolves. 2. Add pentate to test tube of water. Shake to see if it dissolves in the water. 3. Add normal propyl chloride to test t...

Experiment # 5 Bonding Type by Solubility, Distillation, and IR Spectroscopy Purpose: Different methods to identify inter and intramolecular bonding types. Procedure: A. Solubility 1) Place sample of KCl into a test tube filled with water. Take note of any layers separating the water with the added material. Mix the materials together in the test tube. Note if the mixture is homogenous or remains separated. 2) Repeat the process each for pentane, n-propyl chloride, ethyl alcohol, n-butyl...

IGCSE Chemistry- Organic Chemistry Practice Exam Questions & Answers. Molecular formula for methane - CORRECT ANSWER CH4 Molecular formula for ethane - CORRECT ANSWER C2H6 Molecular formula for propane - CORRECT ANSWER C3H8 Molecular formula for butane - CORRECT ANSWER C4H10 Molecular formula for pentane - CORRECT ANSWER C5H12 General formula for alkanes - CORRECT ANSWER CnH2n+2 Structural formula for methane - CORRECT ANSWER CH4 Structural formula for ethane - CORRECT ...

Chem 104 Final Exam Review; Questions and Answers 100% Solved Alkanes Correct answer-nonpolar saturated CnH2n+2 Methane Correct answer-1 C Ethane Correct answer-2 C Propane Correct answer-3 C Butane Correct answer-4 C Pentane Correct answer-5 C

microbiology test bank Which of the following was NOT an aspect of Pasteur's experiments to disprove spontaneous generation? A. The necks of the flasks he used were bent into an S-shape B. The flasks were free of microbes until they opened C. He boiled the infusions to kill any microbes present. D. The flasks were incubated for very long periods of time E. The flasks he used were sealed with corks - answersThe flasks he used were sealed with corks The study of the occurrence, distributi...

Experiment #: 5 Title: Bonding Type by Solubility, Distillation, and Spectroscopy Purpose: This lab is used to study the Infrared Spectra and physical properties of molecules to determine what kinds of intra-molecular bonds are present within the molecules and what kinds of inter-molecular bonds are present between the molecules. Procedure: Solubility Evaluation: Experiment 1: 1. Put a small amount of water in a test tube 2. Add two scoops of Potassium Chloride (solid) 3. Swirl in test...