A buffer consists of 0.11 M NaH2PO4 and 0.38 M Na2HPO4. Phosphoric acid is a triprotic acid (Ka1 = 7.2 x 10-3, K42 = 6.3 x 10-8, K13 = 4.2 x 10-13).
(a) Which K, value is most important to this buffer?
O
Kq1 is most important.
O
K 2 is most important.
O
K 3 is most important.
(b) What is the buffer pH?

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

How big are the bighest ocean waves at mavericks