PLEASE HURRY THIS IS TIMED How many moles are equivalent to 2.50x1020 atoms of Fe?
a. 4.15x104 mol Fe
C. 41500 mol Fe
b. 4.5x104 mol Fe
d. .00000415 mol Fe

a. 4.15x10⁻⁴moles Fe

Explanation:

1 mole of a substance is defined as 6.022x10²³ particles of this substance. That means:

1mol of electrons = 6.022x10²³electrons

1mol of atoms = 6.022x10²³atoms

1 mol of molecules = 6.022x10²³ molecules

And 1mol of atoms of Fe = 6.022x10²³ atoms of Fe

That means 2.50x10²⁰ atoms of Fe

2.50x10²⁰ atoms Fe * (1 mole of Fe / 6.022x10²³ atoms) =

4.15x10⁻⁴ moles of Fe

Right answer is:

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.