You are on a bus and a fellow passenger collapses clutching their chest and trying to open a pill bottle. You examine the bottle and it reads: Nitroglycerin for EMERGENCY use in case of heart attack! The person is gasping and unable to speak so you read the label further. Tablets 0.120 grams active ingredient each pill. Dosage 2.0 mg/kg of subject. Warning: Active Ingredient Unstable, 20% potency after 3 years (only 20% effective). The manufacturers date on the bottle is 3 years old and you estimate that the person weighs 180lbs. How many pills should you give them?

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.