Digitalis, a drug used to control atrial fibrillation in patients is to be given as 20.0 mg/kg body weight.  The drug concentration must be carefully controlled and accurately measured or the patient may die from too low of concentration from heart complications or too high concentrations of fatal overdose.  Calculate the mg of digitalis needed to treat a 160.0 pound patient. 2.205 pounds = 1.00 kg.

You are on a road trip. Your car travels at an average speed of 65 miles/hr, with an average gas use of 17.8 km/L.       1 liter = 1,000 mL = 0.264 gallons. 1 km = 0.621 miles.  1) If your trip takes 2.6 hours, determine how many total liters and gallons of gasoline are used on this trip. 2) How many mL (milliliters) of gasoline are used by the car each minute during this trip? 3) The density of the gasoline used on your trip is 0.755 g/mL. What is the total mass in grams, and in ounces of the gasoline used on your trip?

Ethanol has a density of 0.789 g cm‐3. Calculate the volume in mL that must be poured into a measuring cylinder to give 19.8 g of ethanol. Note 1 mL = 1 cm3.

A chemist must prepare 350.mL of 235.mM aqueous potassium permanganate KMnO4 working solution. She'll do this by pouring out some 0.248M  aqueous potassium permanganate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the potassium permanganate stock solution that the chemist should pour out. Round your answer to 3 significant digits.

A chemist must prepare 325. mL of 1.00 M aqueous aluminum sulfate (Al₂(SO4)3) working solution. She'll do this by pouring out some 1.74 M aqueous aluminum sulfate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the aluminum sulfate stock solution that the chemist should pour out. Round your answer to 3 significant digits. mL x10 X

A student pipetted 10 mL of a sample solution into a 250 mL volumetric flask and diluted it to the mark with distilled water. The student then, pipetted 10 mL of this new solution into a 50.00 mL volumetric flask and diluted it to the mark with water. What is the dilution factor of the final solution? 100X 25X 125X 5X 50X

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

In some polluted city air the amount of lead was measured at 3.1 x 10^-6 g/m^3. What is the amount of lead in nanograms per cubic centimeter

A A chemistry student weighs out 0.130 g of phosphoric acid (H,PO,), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. mL x10

3. The total volume of seawater is 1.5 x 1021 L. Assume that seawater contains 3.1% NaCl by mass (this means that there are 3.1 g NaCl in 100 g solution) and that its density is 1.03 g/mL, calculate the total mass of NaCl in the seawater in kilograms. Note that 1 kg = 1000 g. 4. Copy the table and fill in the blanks with the appropriate values, symbols and the like: (Note: You can use a periodic table to locate the element.) 5. 6. 7. 8. SYMBOL protons neutrons electrons net charge Which of the following are: (a) SO₂ (b) Sg 5 6 5 Write only the letter of your choice. (c) Cs (d) N₂O5 56 26 A. Molecules but not compounds B. Compounds but not molecules C. Both compounds and molecules Which of the following has more atoms? A. 1.10 g of hydrogen (H) atoms B. 14.7 g of chromium (Cr) atoms 2+ Fe CHEM01-(09-101P) Problem Set No. 1 (e) (f) 0₂ o o Which of the following has a greater mass? A. 2.0 atoms of lead B. 5.1 x 1023 mole lithium 16 18 - 3 79 117 79 (g) CH4 (h) KBr 86 136 0 Write the…