CHEM 130 final exam
Comprehensive Questions
(Frequently Tested) and Complete
Solutions Graded A+
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what is chemistry? - Answer: the study of matter
,hypothesis - Answer: a tentative explanation for a single or small
number of observations. can be validated or invalidated by
experiments.
law - Answer: a brief statement that summarizes many past
observations and predicts future ones. can be validated or
invalidated by experiments (laws don't explain why but
summarize with a statement)
theory - Answer: also called model. a broad and deep explanation
for a large number of observations. consists of a set of
extensively-tested hypothesis. widely accepted model that be
used to predict behavior. can be validated/invalidated
Which of these statements about the scientific method is NOT
true? - Answer: a law can also be described as a model
Based on a limited number of experimental observations, Walter
White makes the following statement: "The yield of my latest
batch of methamphetamine was 15% lower than expected
because the heating bath failed to maintain a consistent
temperature." This statement is an example of a: - Answer:
hypothesis
, accurate - Answer: if its close to the true (accepted value)
precise - Answer: if the measurements are closely spaced
2.49 g, 2.50 g, 2.52 g, 2.49 g (avg = 2.50 g) true value = 2.50 -
Answer: precise and accurate
2.49 g, 2.50 g, 2.52, 2.49 (avg=2.50) true value= 3.77 g - Answer:
precise but not accurate
1.19 g, 1.62 g, 1.40 g, 1.79 g (avg=1.50g) true value= 2.50 g -
Answer: not accurate and not precise
write 600,592 in scientific notation - Answer: 6.00592 x 10^5
write 0.003925 in scientific notation - Answer: 3.925 x 10^-3
write 12,756.1 in scientific notation - Answer: 1.27561 x 10^4
write 0.00002093 in scientific notation - Answer: 2.093 x 10^-5
Comprehensive Questions
(Frequently Tested) and Complete
Solutions Graded A+
Professional Academic Assistance Services
Services Offered
• Proctored Exam Assistance
• Online Class Management (Full Course Support)
• Exam Preparation & Study Materials
• Assignments and Coursework Support
• Essay and Research Paper Writing
• Discussion Posts & Responses
• Editing and Proofreading
• Confidential Academic Consultation
Contact Information
Email:
WhatsApp link: https://wa.me/254704846336
Fast Response | Confidential | Reliable Academic Support
Helping Students Achieve Academic Excellence
what is chemistry? - Answer: the study of matter
,hypothesis - Answer: a tentative explanation for a single or small
number of observations. can be validated or invalidated by
experiments.
law - Answer: a brief statement that summarizes many past
observations and predicts future ones. can be validated or
invalidated by experiments (laws don't explain why but
summarize with a statement)
theory - Answer: also called model. a broad and deep explanation
for a large number of observations. consists of a set of
extensively-tested hypothesis. widely accepted model that be
used to predict behavior. can be validated/invalidated
Which of these statements about the scientific method is NOT
true? - Answer: a law can also be described as a model
Based on a limited number of experimental observations, Walter
White makes the following statement: "The yield of my latest
batch of methamphetamine was 15% lower than expected
because the heating bath failed to maintain a consistent
temperature." This statement is an example of a: - Answer:
hypothesis
, accurate - Answer: if its close to the true (accepted value)
precise - Answer: if the measurements are closely spaced
2.49 g, 2.50 g, 2.52 g, 2.49 g (avg = 2.50 g) true value = 2.50 -
Answer: precise and accurate
2.49 g, 2.50 g, 2.52, 2.49 (avg=2.50) true value= 3.77 g - Answer:
precise but not accurate
1.19 g, 1.62 g, 1.40 g, 1.79 g (avg=1.50g) true value= 2.50 g -
Answer: not accurate and not precise
write 600,592 in scientific notation - Answer: 6.00592 x 10^5
write 0.003925 in scientific notation - Answer: 3.925 x 10^-3
write 12,756.1 in scientific notation - Answer: 1.27561 x 10^4
write 0.00002093 in scientific notation - Answer: 2.093 x 10^-5
