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- Calculate the mass of 0.75 mole of CaCl₂ . 3H₂O, in kilogram. (Note: Some substances are highly soluble in water, therefore CaCl2 . 3H₂O are together. a. 1.2x10-¹ Kg b. 1.6x105 kg c. 1.6x10-¹ Kg d.1.2x105 kg6. Complete the following conversions 10.68 g to mg b. 6.8 x 10* mg to kg а. c. 25.0 mL to L d. 0.64 m to in e. 2.00 in to cm2 f. 162°F to °C g. -18°C to K h. 212.3 K to °C 7. A pharmacy technician is asked to prepare an antibiotic IV solution that will contain 500.0 mg ofWhat does salinity mean? O A. A measurement of the amount of floating particles in fresh water. O B. A measurement of disolved solids in ocean water, mostly salt but also many types of minerals too. OC. A measurement of dissolved solids in fresh water, mostly salt but also many types of minerals too. O D. A measurement of the amount of floating particles in fresh water. DELL F3 F5
- coffee (with milk) a. suspension b. solution c. an element d. heterogeneous mixture4. Which mixture(s) can be separated into its components using filtration? A. oil + vinegar B. sand + iron filings C. pure water D. salt + sugar E. sand + water8. A 141 mg sample was placed on a watch glass that has a mass of 9.203 g. What is the mass of the watch glass and sample in grams?
- 10. When an irregularly shaped solid of mass 105 g was placed in a cylinder that contained 25.00 ml of water, the water level rose to 45.35 ml. What is the density of the solid? A. 0.238 g/mL B. 2.3 g/mL C. 4.3 g/mL D. 5.16 g/ml E. 20.35 g/mL1. Classify each of the following as element, compound, solution or heterogeneous mixture. a. Gold b. Sugar c. Vinaigrette dressing with herbs d. Iron Ore e. Tears 2. How would you separate into its different components? a. A mixture of the volatile gases propane, butane, and isopropane b. A solution of rubbing alcohol made up of isopropyl alcohol and water 3. What instrument would you use to determine a. the mass of a head of lettuce? b. whether your refrigerator is cooling water to 10°C? c. the volume of a glass of orange juice? 4. Computers are not supposed to be in very warm rooms. The highest temperature tolerated for maximum performance is 308 K. Express this temperature in °C and °F. 5. To identify a liquid substance, a student determined its density. Using a graduated cylinder, she measured out a 45-ml sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the substance had to be either isopropyl alcohol (density 0.785…B. Describe whether the following are physical or chemical properties. Explain your answer in no more than 5 sentences. a. Deoxygenated blood is darker than oxygenated blood. b. Carbon dioxide emissions increase the acidity of oceans.
- 7. How many moles are contained in each of the following? A. 21.0 gg CaCa Express your answer using three significant figures. B. 5.30 gg SS Express your answer using three significant figures. C. 40.0 gg H2OH2O Express your answer using three significant figures.1. Homogeneous mixture(s) A. orange juice B. oil + vinegar C. household white vinegar D. salt + pepper E. 100% isopropanolg-sample? A sample of water has 2.15x10 molecules. What is the mass of the sample? 24 ut carbon, 4.58 perc