4. Zinc phosphate and ammonium chlonde are produced by the reaction of 15.00 grams of Encl, and 25 grams of ammonium phosphate
3 Zng + NH, E. Zn, (PO.), + 6 NH.
Find:
A) Limiting reactant
B) Excess reactant
c) Theoretical yeld of NH, CI
D) Calculate the actual yield of NH Cl, at 92% efficiency.

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.