if the oxygen saturation is 50% it means the total hemoglobin content of blood is half saturated with oxygen. in this condition the oxygen delivery to the tissues is the maximum.
Sulfur dioxide contains (nearly) equal masses of sulfur and oxygen.
about 50% i think
The mass percent of oxygen in SO2 is 50 %.
Sorry - no oxygen. 90 % hydrogen 9% helium, 1% lithium.
Because the mass of carbon is not the same as that of oxygen.
Quaternary colors are formed by mixing one primary that is at 100 percent saturation with any other primary that is at either 25 percent or 75 percent saturation. There are twelve quaternary colors: cherry red, red, red-orange, orange-yellow, yellow-green, warm green, cool green, blue-green, blue, ultramarine blue, purple-mauve, and red-violet.
50 percent of 50 is 25
76 Edit to the community's answer: 76% is a lie. Mine was 76% yesterday (June 19, 2015). And I didn't fall unconscious. It is dependent upon the length of time in which you are at that saturation. If you continue to be at 76% for too long you will eventually lose consciousness. But if you are only at 76% for a minute or so you will probably be fine. Put on some oxygen and do some breathing exercises to bring your oxygen saturations up. From what I have been able to find it seems that if your oxygen saturation hits 50% you are immediately unconscious. But more likely it is dependent upon different factors and certain people might be unconscious sooner. However everyone would be unconscious at 50% If you don't have oxygen call for emergency services and do some structured breathing exercises. I have found that the best exercise to bring my oxygen saturation up quickly is to control my exhaling but to let my body inhale at the rate it wants. That is I slowly control my exhaling and but then exert no control on my inhaling. The only problem is the oxygen saturation only stays so high for a short period of time which is why you should call for emergency services if your oxygen saturation is that low. In fact anything below about 90% should probably be called in as difficulty breathing, especially if you have any symptoms of hypoxia, such as, increased rate of breathing, visual problems, trouble concentrating, fatigue, changes in mood, shortness of breath, blue lips, blue fingers tips, blue ears, et cetera.
citric acid reaches its saturation point after about 45 grams of citric acid and 50 ml of water
Current thinking places it at between 50 to 85 percent, depending on time of year and the state of phytoplankton bloom.
50% + 50% = 100%
50 percent!