CHEM 103 Chemistry (CHEM103)

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...

CHEM 103 experiment 6 :Lab report (Portage learning) 2023

CHEM 103 MODULE 2 EXAM 2022 Show the calculation of the molecular weight for the following compounds, reporting your answer to 2 places after the decimal. 1. Al2(CO3)3 2. C8H6NO4Cl 1. 2Al + 3C + 9O = 233.99 2. 8C + 6H + N + 4O + Cl = 215.59 Question 2 Click this link to access the Periodic Table. This may be helpful throughout the exam. Show the calculation of the number of moles in the given amount of the following substances. Report your answerto 3 significant figures.

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...

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 Lab Exam 8 – Portage Learning. 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. It is a dependable predicator of the freezing/melting point of a substnace. it can determine the temperatures when the change occurs.