Overview
Answer the following questions
- On a certain day, a laboratory barometer indicates that the atmospheric pressure is 764.7 torr. A sample of gas is placed in a flask attached to an open end mercury manometer, and meter stick is used to measure the height of the mercury in the two arms of the U tube. The height of the mercury in the open ended arm is 150 mm and height of the arm in contact with the gas in the flask is 105 mm. What is the pressure of the gas in the flask in atmosphere?
Pt-5
- If 2.00 mol of an ideal gas at STP were confined to a cube, what would be the length in cm of an edge of this cube?
Pt-5
1000L = 1m3
- What is the rms speed of an atom in sample of He gas at 25 0C Pt-3
- Thiocyanate, SCN- has three possible structures
- a. Draw the resonance structures of thiocyanate, SCN-.
- b. Assign the formal charge of each atom in each of the three resonance
structures. - c. On the basis of the formal charges and the electronegativities, identify the
major resonance structure. - d. Draw the Lewis dot structure for each of the following molecules or ions. Determine
the number of bonding and nonbonding electron domains and indicate their electron
domain and molecular geometries.
1. BF3
2. NF3
3. BrF3 Pt-12
- Using MO theory draw orbital diagram (bonding and antibonding MO) the Li2 and calculate the bond order after distributing electrons. Pt-3
- Explain with reason why acetonitrile has higher Boiling Point than propane although their molecular weights are very close. Pt-2