It's one of the givens of kinetic molecular theory. It explains why hydrogen gas diffuses faster than carbon dioxide. Thus there is a greater probability that a lighter molecule like hydrogen will be able to cross a given transient empty space faster than a heavier one before the gap, so to speak, closes up.
(<60 kg) for IM injection in the deltoid muscle only if the subcutane-. ous tissue is not bunched and the injection is made at a 90Â° angle; a 1 needle is sufficient in adults weighing 130â152 lbs (60â70 kg);
IM injections are administered in five potential sites: deltoid (commonly used for adult vaccinations), dorsogluteal, ventrogluteal, rectus femoris, and vastus lateralis 3,10,11 (Figure 1). Maximum volumes have been proposed across the various IM sites for adult patients 3,12-16 (Table 1). Overall, 5 mL has been cited for adults as the maximum volume for a single IM injection, with lower maximums proposed for adult patients with less-developed or small muscle mass. 3,13,14 INTRAMUSCULAR INJECTIONS