If 4500 g of Zr metal is reacted with 1.5 x 104 g of water what is the limiting reactant?

Zr

Explanation:

The balance equation of the reaction is:

Zr + 2 H₂O ⇒ ZrO₂ + 2 H₂

Being:

the molar mass of the reactants participating in the reaction are:

If by stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction) they react in moles:

then by stoichiometry the following quantity of mass react:

Now the following rule of three applies: if 91 g of Zr react with 36 g of H₂O, 4500 g of Zr with how much mass of H₂O would it react?

mass of H₂O= 1,780 grams

But 1780 grams of H₂0 are not available, 1.5 * 10⁴(15,000) grams are available. Since it has more mass than it needs to react with 4500 grams of Zr, Zr zirconia will be the limiting reagent.

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

thats how its supposed to be