A Chemistry student had a cold and took 2.3 teaspoons (tsp) of cough syrup. If the syrup had a density of 0.950 g/mL and there is 6.0 mL in 1 tsp, what was the mass, in grams, of the cough syrup? Provide numerical values in standard notation (not scientific notation) not including units.

A chemistry student needs 75.0 g of methyl acetate for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that -3 the density of methyl acetate is 0.934 g⋅cm¯³. Calculate the volume of methyl acetate the student should pour out. Round your answer to 3 significant digits. mL x10 X Ś

Hydrocortisone is used as an anti-inflammatory for localized pain. You need to prepare a 45 mg/mL solution of hydrocortisone for an injection via a dilution.  You have 15 mL of a 175 mg/mL stock solution of hydrocortisone available.  How many mL of the 45 mg/mL solution can you prepare? Note:  Provide your answer using the correct number of significant figures and remember to include your units.

A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 74.1 ºC. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 ºC. What is her percent error?Record only your final answer with the correct number of significant digits and the proper units.

Because of the high heat and low humidity in the summer in Death Valley, California, a visitor requires about one quart of water for every two miles traveled on foot. Calculate the approximate number of liters required for a person to walk 25 kilometers in Death Valle y. 1 quart = 0.946 L, 1 mi =1.609 km Express your answer in decimal notation rounded to three significant figures.

Pheromones are compounds secreted by females of many insect species to attract mates. Typically, 1.00 × 10−8 g of a pheromone is sufficient to reach all targeted males within a radius of 0.500 mi. Calculate the density of the pheromone (in grams per liter) in a cylindrical air space having a radius of 0.500 mi and a height of 46.0 ft (volume of a cylinder of radius r and height h is πr2h). Enter your answer in scientific notation.

Liquid Tylenol has 325 milligrams of acetaminophen per 12.5 milliliters of liquid medicine (a fact that would be commonly abbreviated as 325 mg/ 12.5 ml). It means that if you could pour Liquid Tylenol into a 12.5 milliliter cup and separate all of the ingredients, you would find that it contains 325 milligrams of acetaminophen (the active ingredient that relieves pain) along with some inactive ingredients like flavorings. The doctor orders 260 milligrams of acetaminophen for a patient. If the patient takes the medicine in the form of Liquid Tylenol, how many milliliters of Liquid Tylenol would he need to take to get the prescribed amount of acetaminophen?

When converting between metric units, use the prefixes to help you determine the magnitude of a value. The prefix kk indicates kilo, 1000. Therefore 1000 gg = 1 kgkg. A 25.0 kgkg iron weightlifting plate has a volume of 3180 cm3cm3 . What is the density of the iron plate in g/cm3g/cm3?

Mannitol, a carbohydrate, is supplied as a 25.% solution. This hypertonic solution is given to patients who have sustained a head injury with associated brain swelling. What volume should be given to provide a dose of 71. g? Be sure your answer has the correct number of significant figures. 口味

A chemistry student needs 35.0 mL of dimethyl sulfoxide for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of dimethyl sulfoxide is 1.10 g·cm -3 Calculate the mass of dimethyl sulfoxide the student should weigh out. Be sure your answer has the correct number of significant digits. ?