Calculate the amount of moles in 1.17 x 1016 molecules of H2S.

Explanation:

To convert from molecules to moles, Avogadro's Number must be used.

This number tells us how many particles (atoms, ions, molecules, etc.) are in 1 mole of a substance. For this problem, it is moles of hydrogen sulfide.

We can use the number as a fraction.

Multiply by the given number of molecules.

Flip the fraction so the molecules of hydrogen sulfide will cancel out.

The original measurement of molecules had 3 significant figures so we must round our answer to that.

For the number we calculated, that is the hundredth place. The 2 in the thousandth place tells us to leave the 4 in the hundredth place.

There are about 1.94*10⁻⁸ molecules of hydrogen sulfide.

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