问题
填空题
（8分）
(1)硫酸铵在强热条件下分解，生成氨、二氧化硫、氮气和水，其
成的氧化产物与还原产物分子个数之比为_______________。
(2)某钠盐A的溶液,实验时有以下一现象:(1)加入Ba(NO3)2溶液时出现白色沉淀,(2)加入Na2CO3,有气泡产生,由此可判断出该钠盐A为___________(化学式),写出有关离子方程式_____________________________，____________________________________。
答案
（1）1:3(2分) （2）NaHSO4 （2分） Ba2++SO42-=BaSO4↓(2分) CO32-+2H+=H2O+CO2↑ （2分）
of the eats and 
of the dogs had been adopted; no new cats or dogs were brought to the shelter during this period. What is the greatest possible number of pets that could have been adopted from the animal shelter between Monday and Friday