65mg/ml of sodium pentobarbitol what is the volume of this drug would be appropiate to administer to a 300 g?

Question

rat at a dose of 40mg/kg

Answer 1

300 grams = 0.3 kg x 40 mg/kg = 12mg dose

12 mg divided by 65 mg/ml = 0.185 ml

Answer 2

300 gm * 0.001 kg/gm * 40 mg/kg = 12 mg

so you need 12 mg of pentobarbitol. to get that in mls, use:

12 mg / 65 mg/ml = 0.1846 ml

Answer 3

Approx 200 microliters