Exam (elaborations)
Physical and Chemical Principles
- Course
- Institution
Physical and Chemical Principles Questions with Answers. Includes questions related to analytical, organic, biochemical, and physical chemistry.
[Show more]
Seller
Follow
EngrSalt
Content preview
1. If aspirin is made using the raw materialssalicylic acid and acetic anhydride with a yield
of 75%, how many grams of aspirin will be
produced
A. 25 B. 15
C. 30 D. 1
2. Classify each of the following as homogeneous
or heterogeneous:
I. a door
V. the water you drink
II. the air you breathe
V. salsa
III. a cup of coffee (black)
VI. your lab partner
A. hetero, homo, homo, C. homo, homo, homo,
homo, hetero, hetero homo, hetero, homo
B. hetero, hetero, homo, D. homo, homo, hetero,
homo, homo, hetero hetero, homo, hetero
3. How many beta particles are emitted in the
decomposition of 23892U to 20682Pb?
A. 4 B. 2
C. 6 D. 8
4. Give the mass empirical formula of the
following compound if a sample contains 57.8%C,
36%H, and 38.6%O by mass.
A. C2HO B. C4H3O2
C. C8H6O4 D. C12H9O6
5. The decomposition of iodoethane in the gas
phase proceeds according to the following
reactions:
C2H5I (g) C2H4 (g) + HI (g)
At 660 K, k = 7.2x10-4 /s and at 720 K, k =
1.70x10-2/s. If the initial pressure of
iodoethane is 894 torr at 2450C, what is the
pressure of iodoethane after three half-lives?
, A. 429 torr B. 112 torr
C. 356 torr D. 508 torr
6. Where in the body does fatty acid synthesis
occur?
A. Mitochondrion B. Cytoplasm
C. Ribosomes D. Golgi apparatus
7. A solution of an unknown base was titrated
with 0.150 M HCl, and 22.0 mL of acid was needed
to reach the end point of the titration. How many
moles of the unknown base were in the
solution?
A. 2.2x10-3 ml B. 1.2x10-3 ml
C. 0.9x10-3 ml D. 3.3x10-3 ml
8. Suppose you have a phosphate buffer of pH 7.21.
If you add more solid NaH2PO4 to this buffer,
would you expect the pH of the buffer to increase,
decrease, or remain unchanged?
A. increase D. either increase or
C. remain the same decrease
B. decrease
9. A water sample contains 60 mg/L of calcium, 60
mg/L of magnesium and 25 mg/L of sodium. What is
the total hardness in mg/L as CaCO3?
A. 7.9 B. 395
C. 85 D. 145
10. What is the theoretical oxygen demand in
liters of air for 300 mg/L solution of
methylamine, CH3NH2, to decompose completely?
A.4.2 L B.5.8 L
C. 2.9 L D. 3.6 L
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 EngrSalt. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $4.79. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
74735 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now