1. Identify each of the following as a measurements of length,area, volume, mass

Question

1. Identify each of the following as a measurements of length,area, volume, mass, density, time or temperature: a)ns b)10.0 kg/m3 c) 1.2 pm d)750 km2 e) 83 K f) 4.0 mm3
2. Carry out the following operations, and express the answerwith the appropriate number of significant figures and units: a) (5.231 mm)(6.1 mm) b) 72.3 g/1.5 mL c) 12.21 g + 0.0132 g d) 31.03 g + 12 mg
3. Drug medications are often prescribed on the basis of bodyweight. The adult dosage of Elixophyllin, a drug used to treatasthma, is 6 mg/kg of body mass. Calculate the dose in milligramsfor a 150-lb person.
4. A man who is 5 ft. 8 in. tall weighs 160 lb. What is hisheight in centimeters and his mass in kilograms.

a)ns b)10.0 kg/m3 c) 1.2 pm d)750 km2 e) 83 K f) 4.0 mm3
2. Carry out the following operations, and express the answerwith the appropriate number of significant figures and units: a) (5.231 mm)(6.1 mm) b) 72.3 g/1.5 mL c) 12.21 g + 0.0132 g d) 31.03 g + 12 mg
3. Drug medications are often prescribed on the basis of bodyweight. The adult dosage of Elixophyllin, a drug used to treatasthma, is 6 mg/kg of body mass. Calculate the dose in milligramsfor a 150-lb person.
4. A man who is 5 ft. 8 in. tall weighs 160 lb. What is hisheight in centimeters and his mass in kilograms.

Explanation / Answer

a)ns                   -------- time b)10.0 kg/m3      ------- density    ( density = mass / Volume ) c) 1.2pm            -------length d)750km2         ------- area e) 83K             ------- Temperature f) 4.0mm3            ------- Volume
2. Carry out the following operations, and express the answerwith the appropriate number of significant figures and units: a) (5.231 mm)(6.1 mm)   = 32 mm 2 -------- 2 significant figures b) 72.3 g/1.5 mL     = 48 g /mL       -------- 2 significantfigures c) 12.21 g + 0.0132 g   =12.2         -------- 3significant figures 3. Drug medications are often prescribed on the basis of bodyweight. The adult dosage of Elixophyllin, a drug used to treatasthma, is 6 mg/kg of body mass. Calculate the dose in milligramsfor a 150-lb person. 1 lb = 0.4536 Kg   or 1 Kg = 2.205 lb The dosage of the drug is 6 mg / Kg i.e For the 1 Kg the required mass of the drug is 6mg           Or 2.205 lb the required mass of the drug is 6 mg                 150 lb the required mass of the drug is X mg X = ( 150 * 6 ) / 2.205    = 408.163 mg 4. A man who is 5 ft. 8 in. tall weighs 160 lb. What is hisheight in centimeters and his mass in kilograms. We know that 1 ft = 30.48 cm                      1 in = 2.54 cm So , 5 ft . 8 in = 5 * 30.48 + 8* 2.54 cm                      = 152.4 + 20.32                      = 172.72 cm 160 lb = 160 * 4.448 N Weight , W = mg Mass , m = W / g               = 160* 4.448 / 9.8 Kg               = 72.62 Kg

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