Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas
which group of statements best describe all of the materials he is using in the investigation?
they are each compounds. each of the compounds is made of atoms. all of the atoms are made of matter
they are each made of matter some are compounds and some are elements. they all contain atoms
they are all elements some contain molecules of the same type of atom fome contain different types of atoms
they are each made of matter some are compounds made of one type of element some are pure atoms

hope this !

thinking it would be d not too sure but i think it's right

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.