Chem 121 - Study guides, Class notes & Summaries

CHEM 121 LAB FINAL EXAM 2023 Latest Update

Chem 121 Sample Final Exam Questions and Answers 2024/2025 With Complete Solution; The University of British Columbia

Show the calculation of the molecular weight for the following two compounds, reporting your answer to 2 places after the decimal. 1. Ca3(PO4)2 2. C9H8NO4Cl Your Answer: 1. 3(40.08)+2(30.97+4(16))=310.18 g/mol Ca3(PO4)2 2. 9(12.01)+8(1.008)+14.01+4(16)+35.45 = 229.61 g/mol C9H8NO4Cl 1. 3Ca + 2P + 8O = 310.18 2. 9C + 8H + N + 4O + Cl = 229.61 Question 2 9 / 10 pts You may find the following resources helpful: Scientific Calculator Links to an external site. Periodic Table Equation ...

In the reaction of gaseous N O to yield NO gas and O gas as shown below the following data table is obtained: 2 N O (g) → 4 NO (g) + O (g) 2 5 2 2 2 5 2 2 Your Answer: Data Table #2 Time (sec) [N O ] [O ] 0 0.300 M 0 300 0.272 M 0.014 M 600 0.224 M 0.038 M 900 0.204 M 0.048 M 1200 0.186 M 0.057 M 1800 0.156 M 0.072 M

Complete the two problems below: 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. Your Answer: 8.453x10^2 - the decimal point was moved two places to the left - the first number was 8 .0000321 - the decimal point needed to be moved five spaces to the left. 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 ...

Chem 121 Final ACTUAL Questions and CORRECT Answers Specific Heat equation - CORRECT ANSWER- Electronegativity trend - CORRECT ANSWER- Bond length - CORRECT ANSWER- The less bonds, the longer the bond length. Single bonds are the longest. Bond Strength - CORRECT ANSWER- More bonds, greater strength.

CHEM 121 Final Exam Latest Updates 2024/2025

CHEM 121 Final Exam Latest Update Questions and 100% Verified Correct Answers Actual Exam Guaranteed A+

CHEM 121 Module 2 Exam Questions and Answers- Portage 2024/2025/CHEM 121 Module 2 Exam Questions and Answers- Portage 2024/2025/CHEM 121 Module 2 Exam Questions and Answers- Portage 2024/2025

Experiment #: 2 Title: Density Purpose: To measure the density of some liquids and solids which includes some materials of biological interest. Procedure: 1. Dispense 10mL of water using a 10mL pipet into beaker on zeroed scale 2. Use scale to measure mass of water 3. Calculate density 4. Add 5mL of water to beaker using a 5mL pipet 5. Use scale to measure mass of water 6. Calculate Density 7. Add 10mL of water to beaker using a 10mL pipet 8. Use scale to measure mass of water 9. Ca...