burning Mg
Mg and HCI
heating Cu
heating (NH4)2 CO3
H2O2 and Mn02
KI and Pb(NO3)2
heating CuCO3
please
i need help
2007-03-04 08:19:14 · 5 answers · asked by brian f 2 in Science & Mathematics ➔ Chemistry
2Mg+O2--->2MgO
Mg+2HCl--->MgCl2+H2(g)
Cu (copper can be heated quite hot without reacting)
(NH4)2CO3--->2NH3(g)+CO2(g)+H2O
2H2O2--->O2(g)+2H2O,MnO2 is a catalyst
2KI+Pb(NO3)2--->PbI2(s)+2KNO3
CuCO3--->CO2(g)+CuO
2007-03-04 08:34:35 · answer #1 · answered by science teacher 7 · 1⤊ 0⤋
2Mg + O2 ===> 2MgO
Mg + 2HCl ===>MgCl2 + H2(g)
2Cu + O2 ===> 2CuO
(NH4)2CO3 ==> NH4+ + H2NCO2- (ammonium carbamate)
2H2O2 ==> O2 + 2H2O (it doesn't matter; once MnO2 catalyst is in contact with H2O2, the result was foreordained)
2KI + Pb(NO3)2 ==> PbI2(s) + 2KNO3
CuCO3 ==> CuO + CO2
2007-03-04 16:32:21 · answer #2 · answered by steve_geo1 7 · 0⤊ 1⤋
burning Mg-
2Mg (s) + O2 (g) = 2MgO(s)
Mg and HCl-
Mg(s) + 2HCl (aq) = MgCl2 (s) + H2 (g)
heating Cu- (i'm guessing u mean Copper (II))
2Cu (s) + O2(g) = 2CuO (s)
heating (NH4)2CO3-
(NH4)2CO3 = N2 + H2O + CO2 (not sure about this one)
dont know about the next two (sorry)
heating CuCO3
CuCO3 (s) = CuO (s) + CO2 (g)
i'm absolutely sure about the reactions i've given
2007-03-04 17:05:46 · answer #3 · answered by amandac 3 · 0⤊ 0⤋
2 Mg + O2 --> 2 MgO
2 Cu + O2 --> 2 CuO
(NH4)2CO3 --> 2 NH3 + CO2 + H2O
H2O2 + MnO2 --> H2O + O2 + MnO
2 KI + Pb(NO3)2 --> 2 KNO3 + PbI2
CuCO3 --> CuO + CO2
2007-03-04 16:24:16 · answer #4 · answered by physandchemteach 7 · 0⤊ 1⤋
2Mg + O2 = 2MgO
Mg + 2HCl =MgCl2 + H2
Heating copper is not a reaction
(NH4)2CO3 + heat = 2NH3 + H2O + CO2
2007-03-04 16:43:17 · answer #5 · answered by Matthew P 4 · 0⤊ 0⤋