Questions from General Chemistry

Q: Suppose 1.25 L of argon is cooled from 291 K

Suppose 1.25 L of argon is cooled from 291 K to 78 K. What will be the new volume of the argon sample?

Q: Suppose a 125-mL sample of argon is cooled from 450

Suppose a 125-mL sample of argon is cooled from 450 K to 250 K at constant pressure. What will be the volume of the sample at the lower temperature?

Q: What is the geometric structure of the water molecule? How many

What is the geometric structure of the water molecule? How many pairs of valence electrons are there on the oxygen atom in the water molecule? What is the approximate H-O-H bond angle in water?

Q: What is the geometric structure of the ammonia molecule? How many

What is the geometric structure of the ammonia molecule? How many pairs of electrons surround the nitrogen atom in NH3? What is the approximate H-N-H bond angle in ammonia?

Q: What is the geometric structure of the boron trifluoride molecule, BF3

What is the geometric structure of the boron trifluoride molecule, BF3? How many pairs of valence electrons are present on the boron atom in BF3? What are the approximate F-B-F bond angles in BF3?

Q: What is the geometric structure of the SiF4 molecule? How many

What is the geometric structure of the SiF4 molecule? How many pairs of valence electrons are present on the silicon atom of SiF4? What are the approximate F-Si-F bond angles in SiF4?

Q: Why is the geometric structure of a molecule important, especially for

Why is the geometric structure of a molecule important, especially for biological molecules?

Q: For each of the following sets of volume/temperature data,

For each of the following sets of volume/temperature data, calculate the missing quantity after the change is made. Assume that the pressure and the amount of gas remain the same. a. V = 2.03 L at 24...

Q: At conditions of constant temperature and pressure, the volume of a

At conditions of constant temperature and pressure, the volume of a sample of ideal gas is proportional to the number of moles of gas present.

Q: How is the structure around a given atom related to repulsion between

How is the structure around a given atom related to repulsion between valence electron pairs on the atom?