Which of the following can be characterized as a strong base?
A) Ba(OH)2
B) NH3
C) both a and b
D) neither a nor b
A
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Which nation in Latin America remains the top producer of cocaine?
A) Peru B) Argentina C) Chile D) Colombia E) Brazil
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
The horizon where leached minerals and organic matter accumulate is called the ________
A) O horizon B) parent material C) B horizon D) E horizon E) C horizon
The approximate land surface of the Earth totals more than ________ square kilometers (square miles)
A) 1.5 thousand (579) B) 15 thousand (5,791) C) 150 million (50,791,000) D) 1.5 billion (50,791,000,000) E) 15 trillion (50,791,000,000,000)