CHEM 121
CHEM 121
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CHEM 121 Lab Report 3: Quantitative and Qualitative Analysis FALL 2023 Portage learning
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Title: Quantitative and Qualitative Analysis 
Purpose: The purpose of this experiment is to learn how to measure the amount of a substance 
that is present in a chemical compound. A metal carbonate will be analyzed to determine how 
much CO2 and moles of CO2 are lost. Another experiment will also look into how much water a 
hydrate loses and determine what type of hydrate it is. Paper chromatography will be used to 
determine the identity of chemical substances. Lastly, SEM/EDX will be used to d...
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CHEM 121 Lab Report 2: Density Determination FALL 2023_Portage learning
- Other • 15 pages • 2023 Popular
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Experiment #: 2 
Title: Density Determination 
Purpose: The purpose of this experiment is to learn how to calculate the density of both liquids 
and solids in the chemistry lab by finding the volume and mass of different substances. 
Procedure: 
Density Determination of Water: 
1) A graduated cylinder is to be filled with water 
2) The temperature is taken using a digital thermometer of the water in the graduated 
cylinder 
3) A value is read and recorded in ºC for the temperature of the water ...
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CHEM 121 Lab Report 8: Organic Synthesis FALL 2023_Portage learning
- Other • 6 pages • 2023
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Title: Organic Synthesis 
Purpose: In this lab, three carbon based organic compounds were synthesized to determine 
their true purity. The experiments were done to learn about how to use these compounds’ melting 
points and infrared spectroscopy to determine their percent yield. 
Procedure: 
Experiment 1: Making Acetylsalicylic Acid (aspirin) 
1. Obtain a flask. 
2. Weigh 2 grams of salicylic acid. 
3. Put the 2 grams of salicylic acid into the flask. 
4. Put 5 mL of acetic anhydride into a gr...
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CHEM 121 Exam 2 SPRING 2024 Portage learning
- Exam (elaborations) • 39 pages • 2024
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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 ...
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CHEM 121 Exam 1 SPRING 2024 Portage learning
- Exam (elaborations) • 17 pages • 2024
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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 ...
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CHEM 121 Module 5 exam (Portage learning) SPRING 2024
- Exam (elaborations) • 19 pages • 2024
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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
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CHEM 121 Module 4 exam (Portage learning) SPRING 2024
- Exam (elaborations) • 15 pages • 2024
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Show the determination of the charge on the ion formed by the Mg12 atom. 
Mg has a +2 charge 
S 2S 2P 3S 
also you can just look at the periodic table and see that it is in collumn 2 on the left side and would 
know that it has a +2 charge because the 2 columns on the left are + this is day 1 chem 101 
knowledge 
12 
2 2 6 2 
Mg (metal = lose electrons) 1s 2s 2p 3s 
lose 2e → Mg 
12 
2 2 6 2 
+2 
Ques 10 / 10 pts tion 2
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CHEM 121 Lab 2 Density SPRING 2024 Portage learning
- Other • 11 pages • 2024
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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...
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CHEM 121 MODULE 1 EXAM-with 100% verified solutions-2024
- Exam (elaborations) • 11 pages • 2024
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CHEM 121 MODULE 1 EXAM-with 100% verified solutions-2024
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CHEM 121 FINAL EXAM QUESTIONS AND ANSWERS 100% PASS
- Exam (elaborations) • 9 pages • 2024
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CHEM 121 FINAL EXAM QUESTIONS AND 
ANSWERS 100% PASS 
kinetic molecular theory - Correct Answer ️️ -all matter is made of tiny particles that 
are constantly moving 
fundamental particle - Correct Answer ️️ -take a macroscopic object and divide it 
repeatedly. Eventually you have a particle, which, if further divided is no longer the 
original substance. This smallest piece of the substance is called... 
h2o molecule - Correct Answer ️️ -the fundamental particle of water is what? 
at...
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