Exam (elaborations)

CHEM 103 FINAL EXAM 2024: PORTAGE LEARNING (ALREADY GRADED A+)

1 purchase

Course
CHEM 103

Institution
CHEM 103

CHEM 103 FINAL EXAM 2024: PORTAGE LEARNING (ALREADY GRADED A+) Question 1 Complete the two problems below: 1. Convert 0.0000726 to exponential form and explain your answer. 2. Convert 5.82 x 103 to ordinary form and explain your answer. Answer: 1. Convert 0.0000726 = smaller than 1 = negat...

[Show more]

Preview 2 out of 5 pages

View example

Uploaded on October 23, 2024
Number of pages 5
Written in 2024/2025
Type Exam (elaborations)
Contains Questions & answers

chem
chem 103
chem 103 final
chem 103 final exam
chem 103 final exam 2024
chem 103 final exam 2024 portage
chem 103 final exam 2024 portage learning

Institution CHEM 103
Course CHEM 103

Lectpearl Member since 1 year 26 documents sold

$10.49

Add to cart

Add to wishlist

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

HOSMERIT

CHEM 103 FINAL EXAM 2024: PORTAGE LEARNING
(ALREADY GRADED A+)

Question 1
Complete the two problems below:
1. Convert 0.0000726 to exponential form and explain your answer.

2. Convert 5.82 x 103 to ordinary form and explain your answer.

Answer:

1. Convert 0.0000726 = smaller than 1 = negative exponent, move decimal 5
places = 7.26 x 10-5

2. Convert 5.82 x 103 = positive exponent = larger than 1, move decimal 3
places = 5820

Question 2
Do the conversions shown below, showing all work:

1. 358oK = ? oC

2. 53oC = ? oF

3. 158oF = ? oK

Answer:

1. 358oK - 273 = 85 oC oK → oC (make smaller)
-273

2. 53oC x 1.8 + 32 = 127.4 oF oC → oF (make larger) x
1.8 + 32

3. 158oF - 32 ÷ 1.8 = 70 + 273 = 343 oK oF → oC → oK

, Question 3
Show the calculation of the number of moles in the given amount of the following substances.
Report your answerto 3 significant figures.
1. 12.0 grams of Ca3(PO4)2

2. 15.0 grams of C9H8NO4Cl

Answer:

1. Moles = grams / molecular weight = 12..18 = 0.0387 mole

2. Moles = grams / molecular weight = 15..61 = 0.0653 mole

Question 4
Show the calculation of the percent of each element present in the following compounds. Report
your answer to 2 places after the decimal.

1. Al2(SO4)3

2. C7H5NOBr
Answer:
1. %Al = 2 x 26.98/342.17 x 100 = 15.77% %S = 3 x 32.07/342.17
x 100 = 28.12%
%O = 12 x 16/342.17 = 56.11%

2
%C = 7 x 12.01/ 199.02 x 100 = 42.24% %H = 5 x 1.008/ 199.02 x 100
= 2.53%
%N = 1 x 14.01/199.02 = 7.04% %O = 1 x 16.00/199.02 x 100
= 8.04%
%Br = 79.90/199.02 x 100 = 40.15%

Question 5
1. List and explain which of the following atoms holds its valence electrons less tightly.

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 Lectpearl. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $10.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

67479 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling

Seller

Case ·

Exam (elaborations)

CHEM 103 FINAL EXAM 2024: PORTAGE LEARNING (ALREADY GRADED A+)

Document information

Subjects

Written for