CHEM 121 Final Exam Questions and Answers- Portage Learning/CHEM 121 Final Exam Questions and Answers- Portage Learning/CHEM 121 Final Exam Questions and Answers- Portage Learning
chem 121 final exam questions and answers portage learningchem 121 final exam questions and answers portage learningchem 121 final exam questions and answers portage learningchem 121 final exam
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
Question 4
1. Show the calculation of the density of benzene if 28.6 g occupies 32.7 ml.
, 2. Show the calculation of the volume of 14.3 grams of acetone with density of
0.785 g/ml
1. D = M / V = 28..7 = 0.875
2. V = M / D = 14..785 = 18.2 ml
Question 5
1. 1.0780 contains ? significant figures.
2. 5.23 contains ? significant figures.
3. 5.23 x 1.0780 = ? (give answer to correct number of significant figures)
1. 1.0780 contains 5 significant figures
2. 5.23 contains 3 significant figures
3. 5.23 x 1.0780 = 5.63794 = 5.64 (to 3 significant figures for 5.23)
Question 6
Classify each of the following as an element, compound, solution or heterogeneous
mixture and explain your answer.
1. Honey - is not on periodic table (not element) - no element names (not
compound) appears to be one substance = Solution
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