Is density useful in identifying unknown substances?

Yes

Explanation:

You can identify an unknown substance by measuring its density and comparing your result to a list of known densities.

Density = mass/volume

When you divide the mass by the volume and compare the density to a list of known densities.

Density can be used to identify an object by discovering the mass of your object on the scale, then finding the capacity of an item with a uniform shape. 2

Explanation:

You can identify an unknown substance by measuring its density and comparing your result to a list of known densities. Density = mass/volume. Assume that you have to identify an unknown metal. You divide the mass by the volume and compare the density to a list of known densities. Density is one of the properties that can be used to identify an unknown metal. As you know, density is the ratio of mass to volume. In equation form: Density K Mass J Volume. these measurements, you will calculate the density of the unknown metals.

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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.