CHEM 103 Exam 1-6 Final - Complete Solutions, Graded A
1 view 0 purchase
Course
CHEM 103
Institution
CHEM 103
1
CHEM 103 Exam 1-6 Final - Complete Solutions, Graded
A
Exam 1-6
EXAM 1
Question 1
1. Convert 1005.3 to exponential form and explain your answer.
2. Convert 4.87 x 10-6 to ordinary form and explain your answer.
Answer:
1. Convert 1005.3 = larger than 1 = positive exponent, move decimal 3
...
3. 175oK - 273 = -98 oC x 1.8 + 32 = -144.4 oK → oC → oF
oF
Question 4
Be sure to show the correct number of significant figures in each calculation.
1. Show the calculation of the mass of a 17.9 ml sample of chloroform
with density of 1.49 g/ml
2. Show the calculation of the volume of 19.4 grams of cresol with
density of 1.02 g/ml
Answer:
1. M = D x V = 1.49 x 17.9 = 26.7 g
2. V = M / D = 19..02 = 19.0 ml
Question 5
1. 1.35601 contains ? significant figures.
2. 0.151 contains ? significant figures.
3. 1.35601 + 0.151 = ? (give answer to correct number of significant figures)
Answer:
3
, 1. 1.35601 contains 6 significant figures.
2. 0.151 contains 3 significant figures.
3. 1.35601 + 0.151 = 1.50701 = 1.507 (to the thousands place for 0.151)
Question 6
Classify each of the following as an element, compound, solution or
heterogeneous mixture and explain your answer.
1. Honey
2. Hydrogen iodide
3. Tea
Answer:
1. Honey - is not on periodic table (not element) - no element
names (not compound) appears to be one substance = Solution
2. Hydrogen iodide - is not on periodic table (not element) - has two element
names
= Compound
3. Tea - is not on periodic table (not element) - no element names (not
compound) appears to be one substance = Solution
4
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ScottStevens. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.98. You're not tied to anything after your purchase.
