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);
Intramuscular (IM) injection . site for infants and toddlers Intramuscular (IM) injection . site for children and adults. IM injection site (shaded area) Insert needle at a 90Â° angle into the anterolateral thigh muscle. Give in the central and thickest portion of the deltoid muscle â above the level of the armpit