The number of grams in 2.56 x 1025 molecules of HCl are

1569.5g

Explanation:

Given parameters:

Number of molecules   = 2.56 x 10²⁵

Unknown:

Mass of HCl  = ?

Solution:

To solve this problem, let us find the number of moles first;

      Number of moles  =  

 So,

    Number of moles  =   = 0.43 x 10²  = 43mol

Now;

 Mass of HCl  = number  of moles x molar mass

           Molar mass of HCl   = 1 + 35.5 = 36.5g/mol

   Mass of HCl  = 43 x 36.5  = 1569.5g

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