CHEM 103 Chemistry (CHEM103)

CHEM 103 Lab Exam 1 – Portage Learning. Which of the volume-measuring devices was determined to be least accurate in the volume measurement experiment? 2. What was the calculated volume for the pipet in the volume measurement experiment? 3. Water at 22.5oC has a density of 0.99766 g/ml. A 10.3 ml sample of water at 22.5oC, delivered from a buret had a mass of 10.1532 grams as measured on an analytical balance. (1) Show the calculation of the actual volume as determined from this mass. (...

CHEM 103 Module 3 Exam with Answers – Portage Learning. The calorimeter and mixture of HCl + NaOH Your Answer: 1. The type of thermochemical process is an acid base reaction or neutralization reaction where heat is given off called a exothermic reaction. 2. The calorimeter and mixture of HCl + NaOH would be described as enthalpy or the total energy of the system. 1. Heat given off = Exothermic process 2. With lid = closed system Question 2 Not yet graded / 10 pts Click this link to a...

A reaction which gives off heat is said to be exothermic . Answer 1: Answer 2: 2. A decomposition reaction has more products than reactants. exothermic Correct! decomposition Correct! Question 2 10 / 10 pts Answer 1: Fill in the blanks: The reaction of AgNO with Cu is a single displacement type reaction. During the reaction of AgNO with Cu a blue (color) solution and black/gray (color) solid are formed. 3 3 single displacement Correct! Answer 2: Answer 3: blue Correct! black/gr...

Classify each of the following as an element, compound, solution or heterogeneous mixture and explain your answer. 1. Barium chloride 2. Blood 3. Boron Answer: 1. Barium chloride - is not on periodic table (not element) - has two element names = Compound 2. Blood - is not on periodic table (not element) - no element names (not compound) appears to be one substance = Solution 3. Boron - is on periodic table = Element 7. Classify each of the following as a chemical change or a physical...

What does it mean that the heat of a reaction is an extensive property? 2. (3 points) Does the following reaction give off heat or absorb heat? Explain briefly. C D H = +263Kcal/mol 3. (4 points) In one experiment in the video, room temperature water was mixed with water at about 38 degrees. To what temperature (about) did the mixture of the two water samples come to after setting for a few minutes? Answer: 1. The heat depends on the amount of substance. If the amount of substance is d...

CHEM 103 Module 1 Exam Questions and Answers. Do the conversions shown below, showing all work: 1. 246oK = ? oC 2. 45oC = ? oF 3. 18oF = ? oK Answer: 1. 246oK - 273 = -27 oC oK → oC (make smaller) -273 2. 45oC x 1.8 + 32 = 113 oF oC → oF (make larger) x 1.8 + 32 3. 18oF - 32 ÷ 1.8 = -7.8 + 273 = 265.2 oK oF → oC → oK 4. Be sure to show the correct number of significant figures in each calculation. 1. Show the calculation of the mass of a 10.5 ml sample of mercury with densi...

CHEM 103 Module 1 Exam Questions and Answers. Click this link to access the Periodic Table. This may be helpful throughout the exam. Convert 0. to exponential form and explain your answer. Convert 8.32 x 102 to ordinary form and explain your answer. Answer: 1. Convert 0. = smaller than 1 = negative exponent, move decimal 4 places = 9.24 x 10-4 2. 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 ...

CHEM 103 Lab Exam 2 – Portage Learning. A reaction which gives off heat is said to be exothermic . Answer 1: Answer 2:

CHEM 103 Lab Exam 2 – Portage Learning. A decomposition reaction has more products than reactants. exothermic Correct! decomposition

CHEM 103 Lab Exam 4 – Portage Learning. What does it mean that the heat of a reaction is an extensive property? 2. (3 points) Does the following reaction give off heat or absorb heat? Explain briefly. C D H = +263Kcal/mol 3. (4 points) In one experiment in the video, room temperature water was mixed with water at about 38 degrees. To what temperature (about) did the mixture of the two water samples come to after setting for a few minutes? Answer: 1. The heat depends on the amount of s...