CHEM 103 Chemistry (CHEM103)

CHEM 103 Module 1 to 6 Exam Answers 2021/2022 Portage learning. 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 = smaller than 1, move decimal 5 places = 0. Question 2 ...

Chem 103 portage learning exam 5

CHEM 103 Module 3 Exam Portage Learning 2023. NH4Cl is being dissolved in water and this process is being studied in a styrofoam coffee cup with a lid and the heat absorbed is measured by means of a thermometer immersed in the reaction mixture. Enter the correct thermochemistry term to describe the item listed. 1. The type of thermochemical process 2. The air above the cup Your Answer: 1) endothermic 2) Surroundings 1. Heat absorbed = Endothermic process 2. The air above the cup = Surro...

Why is glass so often used as a material for lab containers? 3. What is the metal device used to hold hot containers? 4. What is the weighing dish used for solids? 5. What device is used to smother small fires? 1.) beaker 2.) glass is strong combat things like acid and other kinds of harsh stuff. It is neutral with most lab chemicals. 3.) tongs. 4.) watch glass 5.) fire blanket . 1. beaker 2. Glass is so often used as a material for lab containers because it is unreactive with most l...

CHEM 103 Lab Exam 6 – Portage Learning. Bonds within a molecule are called intra-molecular bonds. Non-polar (type) compounds are insoluble in water

Show the calculation of the heat of reaction (ΔHrxn) for the reaction: 2 C2H6 (g) + 5 O2 (g) → 4 CO (g) + 6 H2O (l) by using the following thermochemical data: ΔHf 0 C2H6 (g) = -84.0 kJ/mole, ΔHf 0 CO (g) = -110.5 kJ/mole, ΔHf 0 H2O (l) = -285.8 kJ/mole Your Answer: 2 C2H6 (g) + 5 O2 (g) → 4 CO (g) + 6 H2O (l) ΔHrxn = ∑ n ΔHf 0 (products) - ∑ m ΔHf 0 (reactants) ΔHrxn = 4 ΔHf 0 (CO) + 6 ΔHf 0 (H2O) - 2 ΔHf 0 (C2H6 ) - 5 ΔHf 0 (O2) ΔHrxn = 4 (-110.5 kJ/mole...

CHEM 103 Lab Exam 8 – Portage Learning. The unit “m” stands for _______ in this experiment. 2. (4 points) Why was warming data used for estimating the freezing/melting point of the cyclohexane? 3. (3 points) How much of the cyclohexane solvent was placed in the test? 1.) molarity 2.) It is considered reliable.

CHEM 103 Module 1 Exam Questions and Answers. Convert 8.32 x 102 = positive exponent = larger than 1, move decimal 2 places = 832 2. Click this link to access the Periodic Table. This may be helpful throughout the exam. Using the following information, do the conversions shown below, showing all work: 1 ft = 12 inches 1 pound = 16 oz 1 gallon = 4 quarts 1 mile = 5280 feet 1 ton = 2000 pounds 1 quart = 2 pints kilo (= 1000) milli (= 1/1000) centi (= 1/100) deci (= 1/10) 1. 350 pounds = ...

CHEM 103 Module 3 Exam with Answers – Portage Learning. A reaction between HCl and NaOH is being studied in a styrofoam coffee cup with a lid and the heat given off is measured by means of a thermometer immersed in the reaction mixture. Enter the correct thermochemistry term to describe the item listed. 1. The type of thermochemical process 2. The calorimeter and mixture of HCl + NaOH Your Answer: 1. The type of thermochemical process is an acid base reaction or neutralization reaction...

CHEM 103 Lab Exam 1 – Portage Learning. What is the wide-mouthed glass container shown below? Your Answer: 2. Why is glass so often used as a material for lab containers? 3. What is the metal device used to hold hot containers? 4. What is the weighing dish used for solids? 5. What device is used to smother small fires?