The electronic structures of atoms X and Y are shown. х
X and Y form a covalent compound.
What is its formula?
A XY
B XY
C
XY
D XY

How many grams of ammonia would be produced by the decomposition of 16.93 mlof hydrazine? (the density of hydrazine is 1.021g/ml)

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.

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!