CHEM 120 (CHEM 120)

CHEM 120 WEEK 6 DISCUSSION 1-POLYMERS (GRADED A)

CHEM 120 WEEK 4 DQ: ACIDS & BASES

CHEM 120 Final Exam Study Guide

CHEM 120 Week 2 Discussion 1 - Chemical Names

Question: Bismuth (Bi) has a mass number if 214 and an atomic number of 83 and decays by beta emission. The product of this decay is Question: The pendant group in polystyrene is an Question: Which of the following statements about crystalline and amorphous is Question: Which physical state has the greatest entropy. _______ . Question: The fact that heat pump requires energy to move heat from a colder object to a hotter object is a real life observation of which thermodynamic law? _______ . Ques...

6. (TCO 6) A gas at a temperature of 95 degrees C occupies a volume of 165 mL. Assuming constant pressure, determine the volume at 25 degrees C. Show your work. (Points : 5) Using Charles’ Law, ( V1/T1) = (V2/T2). First, convert temperature to KELVIN (T1 = t1 +273) Thus, T1 = 95 + 273 = 368. We have V1 (165 mL) & T2 = (25 + 273) = 298. V2 = (V1*T2)/T1 = (165 mL*298)/368 = 133.6 mL. 0 7 Short 16 7. (TCO 6) A sample of helium gas occupies 1021 mL at 719 mmHg. For a gas sample at constant tempera...

Week 1: Quiz Instructions Here is some information about the quiz. • This quiz covers COs 1 and 2 and Chapters 1, 2, and 3. • This quiz is worth 30 total points, which include the followin g questions: o 10 multiple choice questions (2 points each); o 2 short-answer questions (3 points each); o one essay question 4 points. • You have 40 minutes to finish the quiz. • When the time limit is reached, you will automatically be exited from the exam. By submitting this work, I am attesting tha...

Week 4 Assignment: 20 points 1. Solve these ideal gas law problems. Show all work for credit. a. A gas occupies 250 mL at 739 mmHg. For a gas at constant temperature, determine the volume of gas at 514 mmHg. (1 points) P*V=P*V 739*250 = 514*V /514 = 359 b. Use the molar volume of a gas, at STP, to determine the number of moles of CO2 in 4.00 L of CO2 gas. (1 points) 22.4L/mol 4*(1/22.4) 0.179 c. A sample of nitrogen (N2) has a volume of 50.0 L at a pressure of 2 ATM. What is the vo...

1. Question : (TCO 9) An alkene is a carbon compound that contains a(n) _____ bond. Student Answer: double triple hydrogen aromati single Points Received: 3 of 3 Comments: Question 2.Question : (TCO 9) Which is the name of this compound CH3-CH2-CH2-CH2-CH3 ? Student Answer: Butane