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A sample of carbon dioxide gas occupies a volume of 3.50 l at 125 kpa and 273 K. What pressure in STP units would the gas exert if the volume was decreased to 2.00 liters at 273 K?
A 2.00 Liter container of nitrogen had a pressure of 3.20atm. What volume would it be 692 torr?
Oxygen gas is a temperature of 40 C when it occupies a pressure of 12.30 psi. To what temperature will it have at a pressure of 6.50 psi?
A sample of nitrogen occupies a volume of 250 mL at 25 C. What volume will it occupy at 0C?
A mixture of 50.0 g of nitrogen and 35.0 g of oxygen has a total pressure of 0.900 atm. What is the partial pressure of each gas?
How does a paperclip float on water? Use surface tension and intermolecular forces in your answer. Also how do intermolecular forces cause surface tension?
9. 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?
10. Match the following
A B
Body fluid component Cu2+
Heme respiratory carrier Ca2+
1.5 to 2% of body mass Na+
Muscle and nerve control K+
Cofactor in enzyme, e transfer Co3+
Vitamin B12 Fe2+
Heart muscle function Mg2+
- Use the localized electron model to describe the bonding in hydrogen cyanide and
Phosgene (COCl2).
1. 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.
