1+14+(3*16)=63g/mol
hope it helps
First question

Balaneced:

Find how many moles potassium iodide it is in 345.0 grams

Find how many moles potassium nitrate there is for 2.078 moles 

Find how many grams potassium nitrate there is in 2.078 moles 

Second question

Answer:
I think the answer of the question is C?
Mostly found on the soles of feet, palms, forehead, cheeks and of course armpits they're also called eccrine sweat glands
ΔS =S(products) -S(reactants)
Where ΔS is the change of entropy in a reactions
a. ΔS = (2) - (2+1) = -1
b. ΔS = (1+1) -(1) = 1
c. ΔS = (1+2) - (1) = 2
d. ΔS = (2) - (2+1) = -1
e. ΔS = (1) - (1) = 0
ΔS is negative for reaction a. and d.