The molar mass of sodium chloride is 58 g/mol. how many grams of sodium chloride are in 0.5 mol of sodium chloride?

Explanation:

we know that it's molar mass is

This means that 1 mol of sodium chloride contains 58g of sodium chloride; now How many grams of are in 0.5 moles?

In 0.5 mol of NaCl there will be 29 g of sodium chloride

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