Chem120 atomic structure - Study guides, Class notes & Summaries

Initial Post Instructions Option 1: Your initial post in the discussion this week consists of two parts. First, choose amolecule used in healthcare, industry, or found in a natural source and discuss theimportance of this molecule. Be sure to include at least one outside source and makesure to follow APA citation guidelines. In the second part of your initial post, we will be practicing naming ionic and covalentcompounds as well as polyatomic ions. To begin, give the chemical formula for each ...

OL Lab 2 Chemistry Safety 1 |Elaborated| CHEM-120: Intro to General, Organic & Biological Chemistry with Lab OL Lab 2 Chemistry Safety 1 |Elaborated| CHEM-120: Intro to General, Organic & Biological Chemistry with LabOL Lab 2: Atomic Structure: Assess the possibility of life on other planets Learning Objectives • Explain the concept of an atom • Explain the properties of the basic subatomic particles: protons, neutrons, and electrons • Define the atomic number and atomic mass • Defin...

CHEM120 FINAL EXAM -WEEK 8- PAGE 3- 100% Question: (TCO 7) (a, 5 pts) Given that the molar mass of H3PO4 is 97.994 grams, determine the number of grams of H3PO4 needed to prepare 0.25L of a 0.2M H3PO4 solution. Show your work. (b, 5 pts) What volume, in Liters, of a 0.2 M H3PO4 solution can be prepared by diluting 50 mL of a 5M H3PO4 solution? Show your work. Question: (TCO 7) (a, 5 pts) What is the mass/volume percent of a solution prepared by dissolving 43 g of NaOH in enough water to make ...

CHEM 120 FINAL EXAM 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) 7. (TCO 6) A sample of helium gas occupies 1021 mL at 719 mmHg. For a gas sample at constant temperature, determine the volume of helium at 745 mmHg. Show your work. (Points : 5) 8. (TCO 12) If one strand of a DNA double helix has the sequence T T A G C G A C G C, what is the sequenc...

CHEM 120 Week 8 Final Exam A+ GRADED 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. 7. (TCO 6) A sample of helium gas occupies ...