1 mole ------------- 6.02 x 10²³ atoms
5.10 moles -------- ( atoms sulfur )
atoms sulfur = 5.10 x ( 6.02 x 10²³ ) / 1
atoms sulfur = 3.07 x 10²⁴ / 1
= 3.07 x 10²⁴ atoms of sulfur
hope this helps!
B, you can see there are 2 F atoms on each side of the equation
Answer:
Equation 2, because K being more reactive, exchanges position with Pb in PbNO3.
Explanation: