Chemistry Answers

If 15.0 mol of C₃H₈ react with 4.5 mol of O₂ which is the limiting reagent? Which is the excess reagent?

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DEADLINE : 05/02/2022 11 : 00 PM

If the actual yield of CO₂ is 150g, what is the percent yield of CO₂?

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

11. Describe bonding in [Mn(CN)₆]^3- using VBT

           State the hybridisation state of the metal, predict the geometry and magnetic property      of the complex

11. Which of the following elements form diatomic molecule held together by triple covalent bonds?

(a)   Oxygen (b) Lithium (c ) carbon (d) Nitrogen

11. Molecular orbital model is based upon which of the following models ?

(a)   Classical model (b) Bohr model) (c ) Quantum mechanical model (d) Democritus model

The antibiotic thiarubin-A was discovered by studying the feeding habits of wild

chimpanzees in Tanzania. The structure for thiarubin-A is

a. Complete the Lewis structure showing all lone pairs of electrons.

b. Indicate the hybrid orbitals used by the carbon and sulfur atoms in thiarubin-A.

c. How many σ and π bonds are present in this molecule?

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.

a. How many carbon atoms are sp³ hybridized?  

b. How many carbon atoms are sp² hybridized?  

c. Which atom is sp hybridized?  

d. How many σ bonds are in the molecule? 

e. How many π bonds are in the molecule?

f. What is the N=N=N bond angle in the azide (–N₃) group?

g. What is the H–O–C bond angle in the side group attached to the five-membered ring?

h. What is the hybridization of the oxygen atom in the –CH₂OH group?

. 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. 

1.     The following ions are best described with resonance structures. Draw the resonance structures, and using formal charge arguments, predict the best Lewis structure for each ion. a. NCO^- b. CNO^-