Jawapan

2015-10-18T19:20:11+08:00
Sodium carbonate......
why?
sodium carbonate is a soluble salt. (NaCo3)
2015-10-23T23:20:22+08:00
2HNO3 + PbCO3 > Pb(NO3)2 + CO2 + H2O. Lead(II) nitrate is colorless therefore the answer is C