A Biologist Needs 500 ML of a 10 MM Phosphate

Multiple Choice

A biologist needs 500 mL of a 10 mM phosphate buffer. The stock solution of the buffer is 100 mM. How much stock solution should be used to make the 10 mM phosphate buffer?

A) 500 mL
B) 5000 mL
C) 50 mL
D) 5.0 mL
E) 0.5 mL