QUIZ- INTERSYSTEM CONVERSION WITH DIMENSIONAL ANALYSIS

1.

How many drops would be prescribed in each dose of a liquid medicine if 20 mL contained 60 doses? The dispensing dropper calibrates 35 gtts per mL.
- A.
  
  12 gtt
- B.
  
  15 gtt
- C.
  
  8 gtt
- D.
  
  23 gtt
Correct Answer
A. 12 gtt

Explanation
20 mL 35 gtt
------- X _______ = 12gtt
60 doses mL

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2.

If a pint of a certain liquid weighs 9200 grains, what is the specific gravity of the liquid?
- A.
  
  1.0
- B.
  
  1.32
- C.
  
  1.276
- D.
  
  1.26
Correct Answer
D. 1.26

Explanation
convert pint to mL
convert grain to g

to get specific grav is g/mL

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3.

Nitrostat Sublingual tablets are available as 1/200-gr tablets. What is the approximate equivalent in milligrams?
- A.
  
  0.325
- B.
  
  0.077
- C.
  
  0.005
- D.
  
  0.65
Correct Answer
A. 0.325

Explanation
convert grain to milligram using the factor

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4.

Four thousand (4000) nanograms equals 4
- A.
  
  Miligram
- B.
  
  Centigram
- C.
  
  Nanogram
- D.
  
  Microgram
Correct Answer
D. Microgram

Explanation
refer to metric system conversion table

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5.

If a physician prescribed 4 grams of aspirin to be taken by a patient daily, about how many 5-grain tablets should the patient take each day?
- A.
  
  10 tablets
- B.
  
  12 tablets
- C.
  
  15 tablets
- D.
  
  8 tablets
Correct Answer
B. 12 tablets

Explanation
convert grams to grain

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6.

Pico denotes _____ of the basic unit
- A.
  
  10 raised to -12
- B.
  
  10 raised to -15
- C.
  
  10 raised to -18
- D.
  
  10 raised to -10
Correct Answer
A. 10 raised to -12

Explanation
refer to metric system table

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7.

Sudafed cough syrup contains 0.09 g of dextromethorphan hydrobromide in each fluidounce. How many milligrams of this agent would be present in each teaspoonful dose?
- A.
  
  10 mg
- B.
  
  12 mg
- C.
  
  15 mg
- D.
  
  20 mg
Correct Answer
C. 15 mg

Explanation
convert gram to milligram

each teaspoon ful dose is equal to 5 ml

convert 5 ml to fluidounce

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8.

How many 1-fluidounce bottles of lagundi syrup can e prepared form 5 gallons of the syrup?
- A.
  
  740
- B.
  
  640
- C.
  
  680
- D.
  
  540
Correct Answer
B. 640

Explanation
refer to english system conversion table

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9.

A formula for a cough syrup contains 1/8 grain f codeine phosphate per teaspoonful. How many grams of codeine phosphate should be used to prepare a quart of the cough syrup?
- A.
  
  1.75 g
- B.
  
  1.54 g
- C.
  
  1.84 g
- D.
  
  2.54 g
Correct Answer
B. 1.54 g

Explanation
convert grain to grams
teaspoonful = 5 ml then convert to quart

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10.

The inhalant dose of amyl nitrite is 0.18 mL. Express the dose in minims.
- A.
  
  4 mL
- B.
  
  2 mL
- C.
  
  3 mL
- D.
  
  5 mL
Correct Answer
C. 3 mL

Explanation
convert mL to minim using intersystem conversion table

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11.

Tetracycline has been shown to form a calcium complex in bone-forming tissue in infants given oral tetracycline in doses of 0.011 g/lb body weight every 6 hours. Express the dose in terms of milligrams per kilogram of body weight.
- A.
  
  5 mg/Kg
- B.
  
  24.2 mg/Kg
- C.
  
  25 mg/Kg
- D.
  
  11 mg/Kg
Correct Answer
B. 24.2 mg/Kg

Explanation
Tetracycline has been shown to form a calcium complex in bone-forming tissue in infants given oral tetracycline in doses of 0.011 g/lb body weight every 6 hours. To express this dose in terms of milligrams per kilogram of body weight, we need to convert pounds to kilograms. Since 1 pound is approximately 0.454 kilograms, we can calculate the dose as follows: 0.011 g/lb * 0.454 kg/lb = 0.004994 g/kg. To convert grams to milligrams, we multiply by 1000: 0.004994 g/kg * 1000 mg/g = 4.994 mg/kg. Rounding to one decimal place, the dose is approximately 5 mg/kg. Therefore, the correct answer is 5 mg/Kg.

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12.

How many grams of reserpine would be required to prepare 10,000 tablets, each containing 250 mg of reserpine?
- A.
  
  2.5
- B.
  
  2500
- C.
  
  250
- D.
  
  25
Correct Answer
B. 2500

Explanation
To find the total amount of reserpine required for 10,000 tablets, we need to multiply the amount of reserpine in each tablet (250 mg) by the number of tablets (10,000). This can be calculated as 250 mg * 10,000 tablets = 2,500,000 mg. Since there are 1,000 mg in a gram, we divide 2,500,000 mg by 1,000 to get the answer of 2,500 grams. Therefore, 2,500 grams of reserpine would be required to prepare 10,000 tablets, each containing 250 mg of reserpine.

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13.

A pharmacist purchased 5 gallons of alcohol. At different times, 2pints, 2 gallons, 8 fluidounces, and ½ gallon were used by the pharmacist. What volume, in fluidounces, remained?
- A.
  
  256
- B.
  
  264
- C.
  
  280
- D.
  
  296
Correct Answer
C. 280

Explanation
The pharmacist initially purchased 5 gallons of alcohol, which is equivalent to 640 fluid ounces (1 gallon = 128 fluid ounces). Then, the pharmacist used 2 pints (32 fluid ounces), 2 gallons (256 fluid ounces), 8 fluid ounces, and 1/2 gallon (64 fluid ounces). Adding up all the amounts used, we get a total of 360 fluid ounces (32 + 256 + 8 + 64). To find the volume that remained, we subtract the total amount used from the initial amount purchased: 640 - 360 = 280 fluid ounces. Therefore, the correct answer is 280.

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14.

Reduce 25 mcg to g
- A.
  
  2.5 x 10 –6
- B.
  
  2.5 x 10 –5
- C.
  
  2.5 x 10 –7
- D.
  
  2.5 x 10 –8
Correct Answer
B. 2.5 x 10 –5

Explanation
To convert from micrograms (mcg) to grams (g), we need to divide the value in mcg by 1,000,000. In this case, 25 mcg divided by 1,000,000 equals 0.000025 g. In scientific notation, this can be written as 2.5 x 10^-5 g. Therefore, the correct answer is 2.5 x 10^-5.

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15.

Five pints of HCl weigh 2.79 kg. Calculate its specific gravity. a. 0.810 b. 1.180 c. 2.180 d. 3.180
- A.
  
  0.810
- B.
  
  1.180
- C.
  
  2.18
- D.
  
  0.0018
Correct Answer
B. 1.180

Explanation
The specific gravity of a substance is the ratio of its density to the density of a reference substance. In this case, the reference substance is typically water. To calculate the specific gravity, we need to find the density of the HCl solution.

Given that five pints of HCl weigh 2.79 kg, we can convert the weight to grams by multiplying by 1000. This gives us a weight of 2790 grams.

To find the density, we divide the weight by the volume. Since we are given the weight in grams and the volume in pints, we need to convert the volume to milliliters. One pint is equal to 473.176 milliliters. So, five pints is equal to 2365.88 milliliters.

Now we can calculate the density by dividing the weight (2790 grams) by the volume (2365.88 milliliters). This gives us a density of approximately 1.179 grams per milliliter.

Finally, to find the specific gravity, we divide the density of the HCl solution by the density of water, which is 1 gram per milliliter.

Therefore, the specific gravity of the HCl solution is approximately 1.179.

The correct answer is 1.180.

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Quiz- InterSystem Conversion With Dimensional Analysis

How many drops would be prescribed in each dose of a liquid medicine if 20 mL contained 60 doses? The dispensing dropper calibrates 35 gtts per mL.

If a pint of a certain liquid weighs 9200 grains, what is the specific gravity of the liquid?

Nitrostat Sublingual tablets are available as 1/200-gr tablets. What is the approximate equivalent in milligrams?

Four thousand (4000) nanograms equals 4

If a physician prescribed 4 grams of aspirin to be taken by a patient daily, about how many 5-grain tablets should the patient take each day?

Pico denotes _____ of the basic unit

Sudafed cough syrup contains 0.09 g of dextromethorphan hydrobromide in each fluidounce. How many milligrams of this agent would be present in each teaspoonful dose?

How many 1-fluidounce bottles of lagundi syrup can e prepared form 5 gallons of the syrup?

A formula for a cough syrup contains 1/8 grain f codeine phosphate per teaspoonful. How many grams of codeine phosphate should be used to prepare a quart of the cough syrup?

The inhalant dose of amyl nitrite is 0.18 mL. Express the dose in minims.

Tetracycline has been shown to form a calcium complex in bone-forming tissue in infants given oral tetracycline in doses of 0.011 g/lb body weight every 6 hours. Express the dose in terms of milligrams per kilogram of body weight.

How many grams of reserpine would be required to prepare 10,000 tablets, each containing 250 mg of reserpine?

A pharmacist purchased 5 gallons of alcohol. At different times, 2pints, 2 gallons, 8 fluidounces, and ½ gallon were used by the pharmacist. What volume, in fluidounces, remained?

Reduce 25 mcg to g

Five pints of HCl weigh 2.79 kg. Calculate its specific gravity. a. 0.810 b. 1.180 c. 2.180 d. 3.180