CHEMISTRY COMMUNITY

AsthaPatel4B

This question asks us to pick the chemical to build the galvanic cell. Lavelle mentions that many students make the mistake of picking copper. Why can't we pick copper? Is it because copper can't be used to build a redox half reaction?

AsthaPatel4B

In class, Lavelle said that the most common C ring structures are the 5 C rings and the 6 C rings because of stability. Are they most common because they are stable or because they are unstable?

AsthaPatel4B

For number 10 in quiz prep 2 in the course reader, can somebody explain to me why the answer is false? Number 11 states, "The rate constant for the reaction A->B is 25 min^-1 at 298K and 35 min^-1 at 350 K. Calculate the value of the rate constant at 770K. Give your answer in min^-1. What formu...

AsthaPatel4B

I wanted to clarify on a concept I'm not 100% sure about. If temperature is 25 degrees Celsius, the molar entropy of a molecule increases with molar complexity and if the temperature is 0 degrees Celsius, the molar entropy of a molecule increases with molar mass. Is this true or is it the other way ...

AsthaPatel4B

Can somebody please explain the difference between an extensive and intensive property? Also, is Ecell an extensive or intensive one? Why? Thank you :)

AsthaPatel4B

If a question asks for maximum work, why should we immediately know that we are dealing with a reversible reaction? (wmax=wrev) Can somebody please explain the concept behind this?

AsthaPatel4B

The problem states, "At its boiling point,the vaporization of 0.579mol CH4(l) requires 4.76 kj of heat. What is the enthalpy of vaporization of methane?"

My question: To solve this you would divide the heat by the moles(4.76kj/0.579mol). What is the reasoning behind dividing by moles?

AsthaPatel4B

Problem 8.21 says, "A piece of copper of mass 20.0g at 10.0 degrees C is placed in a vessel of negligible heat capacity but containing 50.7g of water at 22.0 degrees C. Calculate the final temperature of the water. Assume no energy is lost to the surroundings." My question: I know that we ...

AsthaPatel4B

Can somebody explain to me the relationship between the strength of a base or acid and the Ka/Kb and PKa/PKb? I know that the smaller the PKb of a base, the stronger the base.

AsthaPatel4B

I know KA is used for weak acids and bases. However, what is the KB used for/ to find?

AsthaPatel4B

What is the difference between percentage yield, percentage ionization, and percentage deprotonation? This is for when we are checking to see if we need to use the quadratic equation or not.

AsthaPatel4B

In this question, it asks to draw the lewis structure for aluminum chloride and name its shape. Then, it asks if the aluminum atom is a lewis acid or lewis base. Why is the aluminum atom a lewis acid? Is it because aluminum is a cation? Therefore, the aluminum atom is positive in charge and is attra...

AsthaPatel4B

The name's Bond.
Ionic Bond.
Taken not shared.

AsthaPatel4B

Can somebody explain why for part b 5 values are allowed for an electron in a 6d-subshell? Do you not take into the consideration the number 6? Do you only take into consideration the d in 6d?

AsthaPatel4B

Can somebody explain the concept of the balmer/lyman series and why the balmer series covers the visible region and the lyman series covers the ultraviolet region? Thank you. :)

AsthaPatel4B

Can somebody explain to me how the final units of measurements come out to hertz? 7.If the wavelength of orange-yellow light is 6.2x10^2 nm, what is its frequency? c=wavelength*frequency frequency=c/wavelength frequency=(2.99x10^8 m*(s^-1))/(6.2x10^2 nm) frequency=(2.99x10^8 m*(s^-1))/6.2x10^-7 m)=4...

AsthaPatel4B

Chemistry jokes are sodium funny! I slapped my neon that one.

CHEMISTRY COMMUNITY

Search found 17 matches

Question 3A of Winter 2014 Practice Final

Cycloalkanes

Quiz 2 Prep

standard molar entropy

Ecell properties

work

Problem 8.37 [ENDORSED]

HW Problem 8.21

Strength of Acids/Bases

KA VS KB

Acid and Bases

Fall 2014 Midterm Question 2B

Re: Post All Chemistry Jokes Here

Question 2.19 in textbook

Re: Balmer/Lyman Series [ENDORSED]

Problem 7 Quiz 1 Preparation in the Workbook [ENDORSED]

Re: CHEM JOKES