A RCRA hazardous waste is a waste that either appears on one of three lists created by the U.S. Environmental Protection Agency, or, if not on the lists, exhibits one of four characteristics of hazardous waste.
How often should oxygen nasal cannulas be changed? Update: Our supplier recommended we change the cannulas monthly and the tubing every 60-90 days. My father has friends who's suppliers have had different guidelines.
1) You cannot change a subscript. You cannot change the oxygen's subscript in water from one to two, as in: H 2 + O 2 2 O 2. True, this balances the equation, but you have changed the substances in it. H 2 O 2 is a completely different substance from H 2 O. 2) You cannot place a coefficient in the middle of a formula.ou cannot change the oxygen's subscript in water from one to two, as in: H 2 + O 2 2 O 2. True, this balances the equation, but you have changed the substances in it. H 2 O 2 is a completely different substance from H 2 O. 2) You cannot place a coefficient in the middle of a formula.