> What is the pH of a butter system that contains 0.200 M hydrocyanic acid (HCN) and 0.210 M sodium cyanide (NaCN)? The pKof hydrocyanic acid is 9.31.
Express your answer using two decimal places.
IVO AO
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How many valence electrons are in atom of radon?

Which statement is true according to the kinetic theory? a. molecules of different gases with the same mass and temperature always have the same average density. b. molecules of different gases with the same mass and temperature always have the same average volume. c. molecules of different gases with the same mass and temperature always have the same pressure. d. molecules of different gases with the same mass and temperature always have the same molecular mass. e. molecules of different gases with the same mass and temperature always have the same average kinetic energy.

What is the daughter nucleus produced a. when 217(at) undergoes alpha decay? b. when 103(mo) undergoes beta decay? c. when 188(hg) undergoes positron emission?