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Examen
CHM 151 Exam 1 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS
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---7marzo 20262025/2026A+
- CHM 151 Exam 1 UPDATED ACTUAL 
QUESTIONS AND CORRECT ANSWERS 
Chemistry - CORRECT ANSWER 
Observation - CORRECT ANSWER 
Law - CORRECT ANSWER 
The study of matter and the changes it undergoes 
Information gathered using senses 
Describes what happens in nature 
Hypothesis - CORRECT ANSWER 
Theory - CORRECT ANSWER 
Tentative explanation for observations 
Well-tested explanation of why something happens 
Macroscopic domain - CORRECT ANSWER 
Microscopic domain - CORREC...
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Examen
CHM 151 Exam 2 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS
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---5marzo 20262025/2026A+
- CHM 151 Exam 2 UPDATED ACTUAL 
QUESTIONS AND CORRECT ANSWERS 
Biomass - CORRECT ANSWER 
plants within a particular region 
biofuel - CORRECT ANSWER 
A measure of the total dry mass of organisms and 
Liquid fuel created from processed or refined biomass 
concentrated vs dilute solutions - CORRECT ANSWER 
concentrated if many solute particles are present 
Dilute - Solutions are dilute if few solute particles are present 
electrolyte (strong vs weak) - CORRECT ANSWER 
Concent...
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Examen
CHM 151 Exam 1 UPDATED QUESTIONS AND CORRECT ANSWERS
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---4marzo 20262025/2026A+
- CHM 151 Exam 1 UPDATED QUESTIONS 
AND CORRECT ANSWERS 
How to find mass % from molecular formula - CORRECT ANSWER 
element x MM of element)/ (MM of compound) 
how to find empirical formula - CORRECT ANSWER 
(subscript of 
Start with the number of grams 
of each element, given in the problem. 
Convert the mass of each element to moles using the molar mass from the periodic table. 
Divide each mole value by the smallest number of moles calculated. 
Round to the nearest whole number...
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