General Chemistry Answers

5.00 L of a gas is collected at 200 K and then allowed to

expand to 20.0 L. What must the new temperature be in order

to maintain the same pressure?

A child has a toy balloon with a volume of 2.80 liters. The

temperature of the balloon when it was filled was 25° C and the

pressure was 2.00 atm. If the child were to let go of the balloon

and it rose 3 kilometers into the sky where the pressure is

0.578 atm and the temperature is -9° C, what would the new

volume of the balloon be?

Atmospheric pressure on the peak of the highest mountain can

be as low as 150 Torr, which is why climbers need to bring

oxygen tanks for the last part of the climb. If the climbers carry

8.0 liter tanks with an internal gas pressure of 3040 Torr, what

will be the volume of the gas when it is released from the

tanks?

4. Balance the following redox reaction in a basic solution. Use any method you prefer (oxidation number method or half reaction method). Ce4+ + I –  Ce3+ + IO3 –

Balance the following redox reaction in an acidic solution using any method you prefer (oxidation number or half reaction). H2PO2 - + TeO4 2-  PO4 3- + Te

~ How would you describe MDMA's bonding arrangement according to Valence Bond Theory? Include details with respect to bond angles and orbital hybridization, the presence of σ and π bonds, etc.

~How would you describe its general shape and intermolecular forces? What does its shape have to do with its functions, effects, and properties?

~ How would you describe MDMA's (C11H15NO2) bonding arrangement according to Valence Bond Theory? Include details with respect to bond angles and orbital hybridization, the presence of σ and π bonds, etc.

~How would you describe its general shape and intermolecular forces? What does its shape have to do with its functions, effects, and properties?

 pH = 6.0

0.000675 M

 0.000675 M calcium hydroxide