Identify the reactant(s) in the reaction below. NaOH + HF → NaF + H20
O A. NaOH and HF
O B. NaF and HF
O C. NaF and H20
O D. NaOH and H20

A. NaOH and HF

Explanation:

reactants are the ones that react with each other to form the product and they are always on the left side of the equation

i just got this problem. it's 90.3

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