General Chemistry Answers

Calculate the initial molar concentration of HF solution with a pH of 2.21. (1.5×10^-11)

A sample of gas has a volume of 2.8 L at a temperature of 27 °C. What temperature is

needed to expand the volume to 15 L? The pressure and number of moles are constant.

A gas sample with a volume of 525 mL and temperature of -25.0 °C is heated to 175.5 °C.

What is the new volume of the gas if pressure and number of moles are held constant?

At What temperature will a solution freeze if 200 grams of calcium chloride, CaCl2, is dissolved in 850 mL of water? kf H2O = 1.86°C/m

At What temperature will a sucrose solution boy if it contains 1.55 Mol of sucrose in 600 mL of water? Kb of water is 0.51 °C/m

The name of Natural Product is Kava (Piper Methysticum)

1. Any more recent work on the natural product and/or organism.
2. A brief review of the isolation procedure, and any suggestions you might have for improving it
3. The key features of the structural data which would tell you if you were dealing with this or a related natural product you isolated from another organism
4. Any structure-activity relationship (SAR) studies done on this natural product.
5. Any synthetic work for which this natural product was the target

2. In determining the mole ratio which of the following will you consider?

A. The subscript of the product

B. The subscript of the reactant

C. The coefficient of balance reactant only

D. The coefficient of balance chemical equation

How many grams of silver chloride will be precipitated by adding sufficient silver nitrate to react with 1500.mL of 0.400M barium chloride solution?