You have 17.6 mL of an unknown concentration of HClO4. What is the concentration of perchloric acid if you added 16.9 mL of 0.14 M NaOH to neutralize it?

What are the first three quantum numbers for the electrons located in subshell 2s?

What is the value of the standard enthalpy of formation of an element in its most stable form?

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.