12. A buffer solution is prepared by mixing 200 cm of 2.00 mol dm-propanoic acid,
CH, CH_COOH, with 600 cm of 1.00 mol dm-sodium propanoate, CH, CH, COONa.
K, for CH CH2COOH = 1.32 x 10-5 mol dm-3
What is the pH of the buffer solution?
A
4.58
B
4.70
Page 9 of 14

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.