Chem help please?

Wat type of reaction is:
a) Zn
b)Mg
Write and equation for the following:
a) Sodium and water react to form sodium hydroxide and hydrogen gas

Answer:
For Zinc(Zn) its a Single Replacement Reaction when you try to react it with HCl. The type of reaction may depend on where you react a certain element or compounds.

for the next question;

2Na + 2H2O --------- 2NaOH + H2

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Zn and Mg are metals, not reactions. Melted and mixed, they form an alloy.

2Na + 2H2O -> 2NaOH + H2

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Errr...

Zn and Mg are NOT reactions (breathing deeply into paper bag...)

2Na + 2H2O -> 2NaOH + H2

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Zn and Mg are natural elements

2Na + 2H20 ----> 2NaOH + H2

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Zn and Mg react with acids in this way :
Zn (s) + 2 HCl (aq) >> ZnCl2 (aq) + H2(g)
Mg (s) + 2 HCl (aq) >> MgCl2 ( aq) + H2 (g)

2Na(s) +2 H2O>>2 NaOH (aq) + H2 (g)

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