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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.