The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Raphael's mural, The School of Athens, depicts the early Greek philosophers engaged in ...
The Nutritional Needs of School-Aged Children Can Be Guided by MyPlate