A2.6 kg rat needs to be dosed w/ insulin. dosage is 10mg insulin/kg body weight. given that concentration is 90mg/ml, how many microliters needed to dose rat?

You need 290 µL of insulin to dose the rat.

Mass of insulin = 2.6 kg rat × (10 mg insulin/1 kg rat) = 26.0 mg insulin

Millilitres of insulin = 26.0 mg insulin × (1 mL insulin/90 mg insulin)

= 0.289 mL insulin

Microlitres of insulin = 0.289 mL insulin × (1000 µL insulin/1 mL insulin)

= 290 µL insulin

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.