The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 0.20 M and the sodium lactate concentration is 2.0 M?
A) 2.86
B) 3.86
C) 4.86
D) 7.00
C
Environmental & Atmospheric Sciences
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Fundamental to insulators are
A. bound electrons. B. free electrons. C. both of these in various proportions D. none of the above
Environmental & Atmospheric Sciences
Striations are associated with
A. potassium feldspar B. plagioclase C. mica D. quartz
Environmental & Atmospheric Sciences
The study of paleomagnetism is possible because ____.
a. the magnetic minerals in rocks create the Earth's magnetic field b. most rocks contain no magnetic minerals c. the magnetic minerals in rocks disrupt the Earth's magnetic field d. the magnetic minerals in a cooling lava point toward the north magnetic pole e. none of these
Environmental & Atmospheric Sciences
Which of the following is NOT one of the four official languages of Switzerland?
A) German B) French C) Italian D) Romansh E) English
Environmental & Atmospheric Sciences