Question

A 5cc vial contains 5 grams. You need 250 mg.
How much (volume) will you give?​

Answer 1

change mg to g by

${10}^{? - 3} mg \: = 1g$

therefore to get for 250mg=

$10}^{ - 3?} \times 0.25 \div 5 = 0.5cc$