Chemistry Answers

A solution of 20.91 % by weight H2SO4 has a specific gravity of 1.150. What is the

normality of this solution? Water is added to dilute this solution to a solution of

3.03% by weight H2SO4 (SG= 1.020). What is the new normality of the resulting

solution and how were they mixed? (Assume 100 mL of the original solution was

used.)

Use the localized electron model to describe the bonding in hydrogenvcyanide and phosgene(COCl2)

For each of the following molecules, write the Lewis structure(s), predict the molecular structure (including bond angles), give expected hybrid orbitals on the central atom, and predict the overall polarity. 

       a. OF2    b. AsF5   c. IF5   

Increasing the temperature increases reaction rate because

A ) the activation energy of the reaction decreases (B)collision frequency increases C) Increases the rate of forward as well as backward reaction equally (Đ) all

2-Which of the following has a maximum wavelength? (A) Far infra-red frequency (B) Gamma rays (C)UV light (D) X-rays

Describe the formation of outer orbit complex [Ni(H2O)6]2+ ion using VBT

Urea, a compound formed in the liver, is one of the ways humans excrete nitrogen.

The Lewis structure for urea is

Using hybrid orbitals for carbon, nitrogen, and oxygen, determine which orbitals overlap

to form the various bonds in urea.

One of the first drugs to be approved for use in treatment of acquired immune deficiency

syndrome (AIDS) was azidothymidine (AZT). Complete the Lewis structure for AZT.

Use the localized electron model to describe the bonding in hydrogen cyanide and

Phosgene (COCl2).

. Draw the resonance structures, and using formal charge arguments, predict the best Lewis structure for each ion. a. NCO- b. CNO