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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-
1. Describe the type of bonding that exists in the F2(g) molecule. How does this type of bonding differ from that found in the HF(g) molecule? How is it similar?
4. Give one example of a compound having a linear molecular structure that has an overall dipole moment (is polar) and another example of a linear molecule that does not have an overall dipole moment (is non-polar). Do the same for molecules that have trigonal planar and tetrahedral molecular structures.
The function below calculates and returns the sum of integers between 1 and n (inclusive) where n is an integer accepted by the function i.e.
If n = 3;
then the function returns 6 (1+2+3). int sum(int n) { int sum = 0;
while (n > 0) { sum = sum + n; --n; } return sum;
}
Rewrite the body of the sum function using a single do-while loop instead of a while-loop
Write a C++ program that accepts an input value in Tambala from the user and
then the program should convert the value to equivalent value in Kwacha and
Tambala.
(For example, if the user enters 112 as input value, the program should display:
1 Kwacha and 12 tambala
A recent study by the American Accounting Association revealed among 30 graduates in accounting 20 students graduating with a major in accounting select public accounting. Suppose we select a sample of 15 recent graduates.
What is the probability that exactly two select public accounting?
What is the probability that exactly five select public accounting?
#339914 on Dec 2023