Exam (elaborations)
biochem module 2 exam questions and answers rated A+ 2024/2025
- Course
- Institution
biochem module 2 exam questions and answers rated A+ 2024/2025
[Show more]
Seller
Follow
Content preview
biochem module 2 examThe pH of a solution of zero.0010 M NaOH is:
1
11
8
0
14 - ANS11 [Kw=[H+ ][OH- ] = 1.Zero x 10-14; [H+ ][0.0010] = 1.Zero x 10-14 [H+ ]=1.Zero x
10-11; pH=-log[1.0 x 10-11;]=11]
Water is a unique molecule. Which of the following contributes to water's unique region in
the chemical global?
- The geometry of the molecule
- The polarity of the O-H bonds
- The capacity of water molecules to hydrogen bond
- The bond angle of water
- All of the answers are correct - ANS- All of the solutions are correct
The bent form of water is because of ______________.
- The dipole arrows in a water molecule - - The electronegativity distinction between
hydrogen and oxygen
- The unequal electron sharing between hydrogen and oxygen
- The unshared electron pairs on the oxygen atom
- None of the answers are correct - ANS- The unshared electron pairs at the oxygen atom
The H+ awareness of an answer is 1.2 x 10-3 M. What is the pH?
-1.20
1.20
3.12
-2.92
2.Ninety two - ANS2.Ninety two
If the Ka of an acid is 5.Sixty three x 10-three, what's the pKa?
6.86
2.25
5.Sixty three
10.12
1.38 - ANS2.25 [pKa = -log(5.63 x 10-3) = 2.25]
List the acids in DECREASING order of electricity (most powerful to weakest):
, Nitrous acid (Ka = four.Zero x 10-4);
acetic acid (Ka = 1.7 x 10-five);
phosphoric acid (Ka = 7.Three x 10-3)
- Nitrous acid, acetic acid, phosphoric acid
- Acetic acid, nitrous acid, phosphoric acid
- Phosphoric acid, nitrous acid, acetic acid - Acetic acid, phosphoric acid, nitrous acid
- None of the above - ANS- Phosphoric acid, nitrous acid, acetic acid
Elemental iodine (I2) is a stable at room temperature. What is the dominant appealing
pressure that exists between I2 molecules within the solid?
- London forces
- Hydrogen bonds
- Halogen forces
- Dipole-dipole forces
- Covalent bonds - ANS- London forces
Which one of the following molecules can shape a hydrogen bond?
A. HBr
B. HCl
C. NH3
D. CH4
E. H - ANSC. NH3
A hydrogen bond can shape among a hydrogen atom bonded to oxygen, O-H, and
________.
C
B
Cl
P
N - ANSN
dipole arrow factors closer to - ANSnegative aspect
The following reaction happens in glues purchased from hardware stores. Customers use
this product to connect plastic together. Epoxy (l) + hardener (l) ⟶ Glue (s) + heat given off
What is the signal (+ or -) of the alternate in Δ G and Δ H?
A) Δ G is (+) and Δ H is (-)
B) Δ G is (-) and Δ H is (-)
C) Δ G is (-) and Δ H is (+)
D) Δ G is (+) and Δ H is (+)
E) None of the above - ANSB) Δ G is (-) and Δ H is (-)
Which of the following is the loose-power exchange of a reaction?
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 Qualityexam. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77973 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
