chemistry 111

28 Chapter 1 Mattel Energy, and Measurement

(e) A paper clip weighs 50 mg or 50 g or 50 kg (f) Your hand has a width of 100 mm or 100 cm or

1.00 m (S) An audiocassette weighs 40 mg or 40 g or 40 kg

1.35 You are taken for a helieopter ride in Hawaii from Kona (sea level) to the top of the volcano Mauna Kea. Which property of your body would change dur- ing the helicopter ride? (a) height (b) weight (c) volume (d) mass

1.36 Convert to Celsius and to Kelvin: (a) 320"F (b) 212"F (c) 0"F (d) -250'F

L.87 Convert to Fahrenheit and to Kelvin: (a) 25"C (b) 40'C (c) 250'C (d) -273'C

Sectron 1.5 What ls a Handy Way to Convert trom One Unit to Another? 1.38 Make the following conversions (conversion factors

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are given in Table 1.3):

is labeled 208 mg/ml, how many mL would be given in a daily dose?

1.49 A critical care physician prescribes an fV of heparin to be administered at a rate of 1100 units per hour. The IV contains 26,000 units ofheparin per liter. Determine the rate of the IV in cclh.

1.50 If an fV is mixed so that each 150 mL contains 500. mg of the drug lidocaine, how many minutes will it take for 750 mg of lid.ocaine to be adminis- tered if the rate is set at 5 ml/min?

1.51 Anurse practitioner otders isotonic sodnrmlactate 50. ml/kg body mass to be administered intravenously for a 139-lb patient with severe acidosis. The rate of flow is 150 gtts/min, and the fV administration set d.elivers 20. gbts/ml, where the unit "gtts" stands for drops of liquid.What is the running time in minutes?

1.52 An order for a patient reads "Give 40. mg of pantoprazole IV and 5 g of MgSO, IV." The pantoprazole should be administered at a concentration of 0.4 mg/ml and the MgSOa should be administered at a concentration of 0.02 g/ml, in separate fV infusion bags. What is the total fluid vol- ume the patient has received from both IV infusions?

Section 1.6 What Are the States of Matter? 1.58 Which states of matter have a defrnite volume? 1.54 WiII most substances be solids, Iiquids, or gases at

Iow temperatures?

1.65 Does the chemical nature of a substance change when it melts from a solid to a liquid?

Section 1.7 What Are Density and Specific Gravity? 1.56 The volume of a rock weighing 1.075 kg is 334.5 mT"

What is the density of the rock in g/ml,? Express it to three significant figures.

1.57 The density of manganese is 7.21 g/ml, that of cal- cium chloride is 2.15 g/ml,, and that of sodium ac- etate is 1.528 g/ml. You place these three solids in a Iiquid, in which they are not soluble. The liquid has a density of 2.15 g/ml. Which will sink to the bot- tom, which will stay on the top, and which will float in the middle of the liquid?

1.58 The density of titanium is 4.54 g/ml. What is the volume, in milliliters, of 163 g of titanium?

1.59 An injection of 4 mg of Valium has been prescribed for a patient suffering from muscle spasms. A sam- ple ofValium labeled 5 mg/ml is on hand. How many mL should be injected?

1.60 The density of methanol at 20'C is 0.791 g/ml.

- whut is the mass, in grams, of a 280 mL sample?

L.61 The density of dichloromethane, a liquid insoluble in water, is 1.33 g/cc. If dichloromethane and water are placed in a separatory funnel, which will be the upper layer?

1.62 A sample of 10.00 g of oxygen has a volume of 6702 rnI' The same weight of carbon dioxide occupies 5058 mI' (a) What is the density of each gas in g/L? (b) Carbon dioxide is used as a fire extinguisher

to cut offthe fire's supply of oxygen. Do the densities ofthese two gases explain the fire- extinguishing ability of carbon dioxide?

1.Bg Make the foliowing metric conve$ions:

(a) 42.6 kg to lb (c) 34 in. to cm (e) 2.73 gal to L (g) 33.6r qt to L (i) 1.1 mi to km

(a) 96.4 mL to L (c) 45.7 kg to g (e) 21.64 cc to mL (g) 0.04a L to mL (i) 63.7 mL to cc (k) 83.4 m to mm

(b) 1.62 lb to g (d) 37.2 km to mi (f) 62 gto oz (h) 43.7 L to gal

0) 34.9 mL to fl oz

(b) 275 mm to cm (d) 475 cm to m (f) 3.29 L to cc (h) 711 g to kg

0) 0.073 kg to mg 0) 361 mg to g

1.40 There are 2 bottles of cough syrup available on the shelf at the pharmacy, One contains 9.5 oz and the other has 300. cc. Which one has the larger volume?

L,41 A humidifier located at a nursing station holds 4.00 gallons of water. How many fluid ounces of water wiII completely frll the reservoir?

t,42 You drive in Canada where the distances are marked in kilometers. The sign says you are 80 km from Ottawa. You are traveling at a speed of 75 mi/h' Would you reach Ottawa within one hour, after one hour, or later than that?

1.43 The speed limit in some European cities is 80 km/h' How many miles Per hour is this?

1.44 Your car gets 25.00 miles on a gallon of gas. What

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would be your car's fuel efficiency in km/L?

1,46 Children's Chewable Tylenol contains 80. mg of acetaminophen per tablet. If the recommended dosage is 10. mgi/kg, how many tablets are needed for a 70.-Ib child?

L,46 A patient weighs 186 lbs. She must receive an IV medication based on body weight. The order reads,

"Give 2.0 mg per kilogram."The label reads "10. mg per cc." How many mL of medication would you give?

1.47 The doctor orders administration of a drug at 120. mg per 1000. mL at 400. mU24 h. How many mg of drug will the patient receive every 8.0 hours?

L,48 The recommended pediatric dosage ofVelosef is

- 20. mgn<glday.What is the daily dose in mg for a child weighing 36 pounds? Ifthe stock vial ofVelosef