Calcium oxide reacts with water in a combination reaction to ...

[jessicacav]

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H2O(l)  Ca(OH)2(s) In a particular experiment, a 5.00-g sample of CaO is reacted with excess water and 6.11 g of Ca(OH)2 is recovered.
 
  What is the percent yield in this experiment? A) 122
  B) 1.22
  C) 7.19
  D) 92.5
  E) 81.9

Question 2

Which pair of compounds is used in the manufacture of fertilizers?
 
  A) HCl and NaOH
  B) HCl and H3PO4
  C) HNO3 and HCl
  D) H2SO4 and H3PO4
  E) HNO3 and NaOH

[Joc]

Answer to Question 1

D

Answer to Question 2

D