Thermal decomposition.
MgCO3(s) ==heat==> MgO + CO2
This would be classed as a double displacement reaction.
Decomposition
Synthesis or addition, not combustion.
Magnesium sulfide is decomposed in water.
Correctly represented, it's Mg + 2HCl --> MgCl2 + H2, and it's a single replacement reaction.
The reaction is 2Mg + O2 ----> 2MgO Mainly it is a Composition reaction (also called as combination or syntesis reaction). But also catogrised in redox reaction & combution reaction.
Mg + H2CO3 = MgCO3 + H2
The reaction is between Mg and O2. 2Mg+O2->2MgO
Correctly represented, it's Mg + 2HCl --> MgCl2 + H2, and it's a single replacement reaction.
Mg + 2HCl => H2 + MgCl2 The type of chemical reaction is a Single Replacement.
Ca + Mg(NO3)2 --> Ca(NO3)2 + Mg This is a single replacement reaction.
2HCl + Mg = MgCl2 + H2 It is a displacement reaction.
Salt formation reaction, reducto-oxidative reaction (redox)
a hard one
a displacement reaction, magnesium displaces hydrogen because it is more reactive
Here is an example of a Competition Reaction: Mg+HCL=Mg+H2 This equation is not balanced.
Oxidation reaction 2Mg + O2 ----------- 2MgO
Magnesium is converted into Magnesium oxide. 2Mg + O2 -----> 2MgO
Correctly represented, it's Mg + 2HCl --> MgCl2 + H2, and it's a single replacement reaction.
An acid base reaction producing salt and water. Mg(OH)2 + 2HCl >> MgCl2 + 2H2O
combination reaction