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);
All four doses of the inactivated polio vaccine (IPV) are given by injection. Sometimes they're given at the same time as the DTaP, hepatitis B, or Hib vaccines. Another type of vaccine â oral polio vaccine (OPV), which is made from a live, weakened version of the virus â has not been used in the United States since 2000. The OPV was considered somewhat more effective than the IPV.