What type of chemical reaction does this equation represent? Zn + 2 HCI --> ZnCl2 + H2
O single replacement
O synthesis
O double replacement
O decomposition

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c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

it means there are 3 atoms of oxygen