Question

please answer wuestions 7-9

sed as a medication to treat a ac arrest (Figure 11.39). This Calculations The concentration, or the amount of solu amount of solution mount of solution at a given temperature and pressure. The amount of solute dissolved in a given regularly quantified when working in o when working in a scientific context or hospital sing. Epinephrine, for example, is used as a medication 10 number of conditions including cardiac arrest (Figure 11.571 medication is distributed as a solution with the solution concentration written on the bottle for easy refer staff must quickly interpret the concentration and convert dosage amount that can be administered to patients in the appropriate amount. One of the difficulties with this is that solutio concentrations are measured and reported using several di conversion between units is a necessary skill, particularly when dosage amounts. Volume/ volume percent (v/v) = vo (veu) – volume of solute several different units and Ticularly when determining volume of solution x 100% Mass / volume percent (m/v) = milliliters of solution x 100% Molarity (M)= moles of solute liters of solution mol L 7. The concentration of salt in seawater (salinity) is relati mL) of seawater contains 35 grams of dissolved salts, (m/v%) of salt in this sample? Express your answer in standard decim salinity) is relatively consistent around the world. If 1.0 liter (1000 of dissolved salts, what is the mass/volume percent concentration ver in standard decimal form with two significant figures. 8. Automobile fuel often contains a certain percentage of ethanol (CH3 certain percentage of ethanol (CH3CH2OH) as a biofuel additive to make ethanol-gasoline blends if a car in Australia runs on fuel containing 1070 (V/V) ethanol, how many milliliters (ml) ethanol are contained in each liter (1000 ml) om den used by the car Express your answer in standard decimal form with two significant figures. 9. Potassium chloride (KCI) is an essential electrolyte in the body. If a patient's blood serum contains a total of 0.021 moles of KCl, and her total blood volume 5.1L, what is the molar concentration of KCl in the patient's blood serum? Express your answer in scientific notation with two significant figures.

Answer 1

to Hore 1 eit of sea water contain 35 grams. .: 1000 me of seawater contains 35 Broums. 100 " , " 35x100. [=3.5 gm Jang Ams: . The (m ) of salt = 3.5% 8. The it. fuel containing 15% (w/v) ethanol 100 me fuel contain 15 me ethanol 1000 1 1 5.1000". -150 meethanol w Ang 100 I g. contain 5.1L blood 5100 my . 0.021 mole Kel- 0.021 „ 0.021 x1000 - " 1000 1 5100 . . = 40117 x 103 (M) | 34.1X15% (m) ha sus 'M'sador stands fon molarity & no of mole of Solute Present in 1000 me solvent-