# A patient’s cough syrup prescription comes in a 250ml bottle. For how long will the cough syrup last if he takes two teaspoons three times a day?

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A patient’s cough syrup prescription comes in a 250ml bottle. For how long will the cough syrup last if he takes two teaspoons three times a day?

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- Some cooks will tell you that they salt the water used to boil pasta because adding table salt (NaCl) to the water makes the water boil at a higher temperature, cooking the pasta faster. Assuming that the water needs to boil at least 5 °C hotter to make a measurable difference in the cooking time for the pasta, how much salt would need to be added to 2 L of water? Or, in other words, did these cooks pay close enough attention in their chemistry classes? Give your answer in cups. Hint: 1 teaspoon of NaCl weighs about 6 g, and there are 48 teaspoons per cup.Fluoridation is the process of adding fluorine compounds to the drinking water. Fluoridated water can help decrease tooth decay in the population. A concentration of 1 ppm of fluorine is typically required to provide adequate amounts. While daily water consumption per person is 151.0 gallons, most people only consume 7.6 of this water; the rest is used for cleaning or gardening. What percent of the sodium fluoride is “wasted”?Does it make a difference if you use a volumetric flask vs a beaker vs a graduated cylinder to make a solution?
- The distance from San Francisco to Los Angeles is approximately 385 miles. You and your friends decide to cycle from San Francisco to Los Angeles. If the distance between the cities is about 385 miles and your doctor tells you that you need to drink 1 L of water for every 1 km that you cycle, how many L of water will each cyclist need to drink on the journey?(Need explain and step) thanksOne of the Ionic compounds in sports drinks is potassium di hydrogen phosphate. The label on one of these sports drinks tells us that 240 mL of the solution contains 30 mg of potassium. KH2PO4 is the only ingredient that can provide potassium. how many grams of KH2PO4 are dissolved in 240 mL of the solution? What is the molars ty of KH2PO4 in this solution? Organize abs label your calculations so that they are presented in a logical manner for full creditSuppose that you are doing an experiment as part of your Capstone Design Project. A glass vessel originally contains 100 mL of fresh water. Then water containing 1 g/mL of NaCl is poured into the vessel at a rate of 2 mL/min, and the mixture is allowed to leave at the same rate. After 10 minutes the process is stopped, and fresh water is poured into the vessel at a rate of 2 mL/min, with the mixture again leaving at the same rate. Find the amount of NaCl in the vessel at the end of an additional 10 min.
- High-density lipoprotein (HDL) cholesterol is the “good” cholesterol because adequate levels reduce the risk of heart disease and stroke. HDL levels between 40. and 59 mg/dL are typical for a healthy individual. What is this range of HDL cholesterol in units of mol/L?you wanted to give drinks to your visitors, your classmates, by mixing a jar of water and a 500 grams powdered juice. you put all the content of the 500 grams (equivalent to one half kilogram) of the powdered juice. is this possible? what is the taste? can you dissolve all the 500 grams powdered juice in a jar of water?is this saturated or unsaturated? (use a complete sentence to answer the question)1. (answer the questions in the tan boxes in the tables below each question) A student conducted an investigation to determine the effect of water temperature on the amount of sugar that dissolves in a beaker of water. Identify components for trial 1 of this investigation. Beaker Number 1 2 3 4 Amount of Water (mL) 100 100 100 100 Amount of Water (mL) Trial 1 Temperature of Temperature of Amount of Sugar Sugar (°C) Water (°C) Dissolved (g) 20 20 20 20 Temperature of Sugar 5 10 15 20 185 189 194 204 Temperature of Water Terms Variable Constant Amount of Sugar Dissolved
- a label on a bottle of cough syrup shows that the bottle contains 25 mg dextromethrophan (DTN) dissolved in a solution weighing 1000.0 mg total. what is the mass percent of DTN?: 1.44 grams of a sample of marble (impure calcium carbonate) dissolved in 40 ml of 1.0 normality (N) of hydrochloric acid, then add an amount of distilled water to the resulting solution, and its volume became 100 ml, it was found that 25 ml of this resulting solution (mixture) needs 19 ml of 0.2 normality (N) NaOH solution. Calculate the normality (mole/L) of the mixture solution and then calculate the percentage of pure calcium carbonate in this sample. If you know that the molecular weight of pure calcium carbonateWhilst working in the pharmacy aseptic unit you are asked to prepare 5 litres of a solution containing potassium ions 1 mmol/mL. What weight of potassium chloride is required? (atomic weight of potassium = 39: atomic weight of chlorine = 35.5) Units - g

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