HS - is amphoteric; it can behave as either an acid or a base.

Prove that HS - is an amphoteric. (You need to write two equations).

Which of the following aqueous solutions is the best conductor of electricity? (1) 0.10 M CH3OH (3) 0.10 M NaOH (2) 1.0 M CH3OH (4) 1.0 M NaOH

A beaker contains 0.42 L of water. The beaker's volume Is ___milliliters.

Who was the person who investigated the personal life of the president but was originally supposed to be investigating Whitewater? a. George Bush c. Al Sharpton b. Newt Gingrich d. Kenneth Starr

At a depth of 40 m, the water pressure is 500 kPa. A diver breathing air (78% N2, 21% O2) at this depth would have what partial pressure of oxygen in his lungs?

Which phrase describe typcal features of plains? Check all that apply A. usually have a low relief B. have steep sides C. usually have a high elevatio D. can be interior E. can be coastal

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.