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A solution with 1 g of solute dissolved in a final volume of 100 mL of solution would be labeled as "1%" or "1% m/v" (mass/volume). This is incorrect because the unit "%" can only be used for dimensionless quantities. Instead, the concentration should simply be given in units of g/mL.
In chemistry, the mole fraction or molar fraction, also called mole proportion or molar proportion, is a quantity defined as the ratio between the amount of a constituent substance, n i (expressed in unit of moles, symbol mol), and the total amount of all constituents in a mixture, n tot (also expressed in moles): [1]
m(NaCl) = 2 mol/L × 0.1 L × 58 g/mol = 11.6 g. To create the solution, 11.6 g NaCl is placed in a volumetric flask, dissolved in some water, then followed by the addition of more water until the total volume reaches 100 mL. The density of water is approximately 1000 g/L and its molar mass is 18.02 g/mol (or 1/18.02 = 0.055 mol/g). Therefore ...
For years, doctors recommended that older adults at a higher risk for heart attack or stroke take a low-dose aspirin once a day to lower their risk. Aspirin helps prevent blood clots from forming ...
A study involving more than 190,000 U.S. veterans found those who ate more yogurt had higher levels of HDL, the good cholesterol, and lower levels of triglycerides — a beneficial ratio.
A systematic review found it brought lower total cholesterol of 12.3% to 31.3% and lower LDL of 7.6% to 40.8%. “It seems to have some effect on decreasing cholesterol, but the research is not as ...
Cholesterol is tested to determine for "normal" or "desirable" levels if a person has a total cholesterol of 5.2 mmol/L or less (200 mg/dL), an HDL value of more than 1 mmol/L (40 mg/dL, "the higher, the better"), an LDL value of less than 2.6 mmol/L (100 mg/dL), and a triglycerides level of less than 1.7 mmol/L (150 mg/dL).
Molar mass: 180.159 g·mol −1: 3D model ... 40 mg of aspirin a day is able to inhibit a large proportion of maximum ... and lower aspirin doses (75 or 81 mg/day) ...