converstion formulas

Question 1

what is the converstion to get from volume to radius or vise versa

Answer 1

v=3/4 pie r^2
r=v x 3/4 pie

Question 2

how to get percent yield

Answer 2

% yield = actually yield/theoretical yield x100

Question 3

how do you get mass percent element

Answer 3

mass of element in one mole of compound/mass of 1 mol compound x 100