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);
General Advice. 1  Administer in deltoid muscle in adults. 2  May administer subcutaneous in patients at risk of hemorrhage from IM injection. 3  Inspect visually for particulate matter or discoloration prior to administration.  No dilution is 1  necessary. Engerix- B. Shake well before withdrawal and 1  use. Use full recommended dose of the vaccine.