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4 - PA 1 - Calculations > Chapter 5: Conversions Within Measurement Systems > Flashcards

Chapter 5: Conversions Within Measurement Systems Flashcards

1
Q

What is the Conversion Factor?

A

A ratio equal to 1, used to change one unit to another without changing the value of the measurement.

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2
Q

What is Dimensional Analysis (DA)?

A

A method used for converting between units by multiplying fractions, canceling unnecessary units until the desired unit is reached.

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3
Q

What is Ratio and Proportion (R&P)?

A

A method for single-step conversions between units involving cross-multiplication and division to solve for the unknown.

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4
Q

List the steps for solving conversions using R&P.

A
  1. Identify the unknown unit.
  2. Find the known equivalent.
  3. Set up a fraction with the known equivalent on one side.
  4. Set up a fraction with the unknown unit on the other side.
  5. Cross-multiply and divide to solve.
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5
Q

Steps for solving conversions using Dimensional Analysis (DA).

A

1) Identify the unit of the answer needed.

2) Set up a fraction with the desired unit in the numerator.

3) Set up the next fraction so the units cancel.

4) Multiply and cancel until the desired unit remains.

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6
Q

How many teaspoons (tsp) are in 1 tablespoon (Tbsp)?

A

3 tsp = 1 Tbsp

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7
Q

How many tablespoons are in 1 ounce (oz)?

A

2 Tbsp = 1 oz

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8
Q

How many ounces are in 1 cup (c)?

A

8 oz = 1 c

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9
Q

Convert 1 pint (pt) to cups (c).

A

1 pt = 2 c

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10
Q

Convert 1 quart (qt) to pints (pt).

A

1 qt = 2 pt

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11
Q

Convert 1 gallon (gal) to quarts (qt).

A

1 gal = 4 qt

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12
Q

How many grams (g) are in 1 kilogram (kg)?

A

1 kg = 1,000 g

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13
Q

How many milligrams (mg) are in 1 gram (g)?

A

1 g = 1,000 mg

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14
Q

How many micrograms (mcg) are in 1 milligram (mg)?

A

1 mg = 1,000 mcg

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15
Q

How many milliliters (mL) are in 1 liter (L)?

A

1 L = 1,000 mL

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16
Q

When converting from a larger metric unit to a smaller one, do you multiply or divide?

A

Multiply (e.g., 1 kg = 1,000 g).

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17
Q

When converting from a smaller metric unit to a larger one, do you multiply or divide?

A

Divide (e.g., 500 mg = 0.5 g).

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18
Q

Convert 1 kilogram (kg) to milligrams (mg).

A

1 kg = 1,000,000 mg

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19
Q

Convert 1.2 liters (L) to milliliters (mL).

A

1.2 L = 1,200 mL

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19
Q

Convert 5.6 kg to mg.

A

5.6 kg = 5,600,000 mg

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20
Q

Convert 0.005 grams (g) to milligrams (mg).

A

0.005 g = 5 mg

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21
Q

Convert 0.002 kg to grams (g).

A

0.002 kg = 2 g

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22
Q

Convert 6.54 kg to mg using the DA method.

A

6.54 kg = 6,540,000 mg

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23
Q

What is the main unit of mass in the Apothecary System?

A

The grain (gr).

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24
Q

How many grains (gr) are approximately equal to 1 gram?

A

1 gr ≈ 60 mg

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25
Q

How many fluid drams (fl ʒ) are in 1 fluid ounce (fl oz)?

A

8 fl ʒ = 1 fl oz

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26
Q

Convert 4 fluid ounces (fl oz) to fluid drams (fl ʒ).

A

4 fl oz = 32 fl ʒ

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27
Q

Convert 15 grains (gr) to milligrams (mg).

A

15 gr = 900 mg

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28
Q

Convert 60 drops (gtt) to teaspoons (tsp).

A

60 gtt = 1 tsp

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29
Q

Convert 45 micrograms (mcg) to milligrams (mg).

A

45 mcg = 0.045 mg

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30
Q

Convert 0.25 grams (g) to milligrams (mg).

A

0.25 g = 250 mg

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31
Q

What is the shortcut rule for converting between metric units?

A

Move the decimal point by 3 places for each 1,000-fold difference.

32
Q

What is the primary use of Dimensional Analysis (DA) in pharmacy?

A

To handle multistep conversions between units in pharmaceutical calculations.

33
Q

What is the primary method to handle single-step conversions?

A

Ratio and Proportion (R&P), using cross-multiplication.

34
Q

What is the abbreviation for teaspoon?

A

tsp

35
Q

What is the abbreviation for tablespoon?

A

Tbsp

36
Q

What is the abbreviation for pound?

A

lb or #

37
Q

What is the abbreviation for ounce?

A

oz

38
Q

What should you use instead of cc for volume to avoid confusion?

A

mL (milliliters)

39
Q

How many ounces (oz) are in 1 pound (lb)?

A

16 oz = 1 lb

40
Q

What is the conversion for 1 Tbsp to teaspoons (tsp)?

A

1 Tbsp = 3 tsp

41
Q

What is the abbreviation for grain in the Apothecary system?

A

gr

42
Q

How many micrograms (mcg) are in 0.25 milligrams (mg)?

A

250 mcg

43
Q

Convert 1.75 L to mL.

A

1.75 L = 1,750 mL

44
Q

Convert 36 kg to grams (g).

A

36

45
Q

How many quarts (qt) are in 6 pints (pt)?

A

6 pt = 3 qt

46
Q

Convert 0.125 mg to micrograms (mcg).

A

0.125 mg = 125 mcg

47
Q

How many milliliters (mL) are in 0.5 liters (L)?

A

0.5 L = 500 mL

48
Q

Convert 58,400 mL to liters (L).

A

58,400 mL = 58.4 L

49
Q

Convert 0.05 grams (g) to milligrams (mg).

A

0.05 g = 50 mg

50
Q

Convert 24 ounces (oz) to cups (c).

A

24 oz = 3 cups

51
Q

Convert 1 Tbsp to mL.

A

1 Tbsp ≈ 15 mL

52
Q

Convert 3.75 liters (L) to milliliters (mL).

A

3.75 L = 3,750 mL

53
Q

How many gallons (gal) are in 32 ounces (oz)?

A

32 oz = 0.25 gal

54
Q

What is the rule for moving the decimal when converting from a smaller metric unit to a larger metric unit?

A

Move the decimal point to the left by 3 places or divide by 1,000.

55
Q

Convert 6 cups to ounces (oz).

A

6 cups = 48 oz

56
Q

Convert 45 gtt (drops) to tsp.

A

45 gtt ≈ 0.75 tsp

57
Q

How many fluid drams are in 4 fluid ounces?

A

4 fl oz = 32 fl drams

58
Q

What are the most common weight units used in pharmacy in the metric system?

A

Kilogram (kg), gram (g), milligram (mg), microgram (mcg).

59
Q

What are the most common volume units used in pharmacy in the metric system?

A

Liter (L) and milliliter (mL).

60
Q

Convert 500 mL to liters (L).

A

500 mL = 0.5 L

61
Q

How many pints (pt) are in 4 cups (c)?

A

4 cups = 2 pints

62
Q

What is the apothecary system symbol for fluid ounce?

A

The symbol for fluid ounce is fl ℥.

63
Q

How do you convert grains (gr) to milligrams (mg)?

A

Multiply the number of grains by approximately 60 to get milligrams (e.g., 1 gr ≈ 60 mg).

64
Q

Convert 125 mg to grams (g).

A

125 mg = 0.125 g

65
Q

Convert 0.5 mg to grams (g).

A

0.5 mg = 0.0005 g

66
Q

What should be used to measure liquid medications at home?

A

Calibrated medication cups or oral syringes should be used to measure liquid medications at home.

67
Q

Convert 2.5 grams (g) to milligrams (mg).

A

2.5 g = 2,500 mg

68
Q

Convert 3.56 grams (g) to milligrams (mg).

A

3.56 g = 3,560 mg

69
Q

How many milliliters (mL) are in 8 ounces (oz)?

A

8 oz = 240 mL

70
Q

Convert 0.04 kg to grams (g).

A

0.04 kg = 40 g

71
Q

Convert 2 gallons to quarts.

A

2 gallons = 8 quarts

72
Q

Convert 2 quarts to liters (L).

A

2 quarts ≈ 1.89 liters (L)

73
Q

What are the most common units of mass in the apothecary system?

A

Grain (gr) and dram (ʒ).

74
Q

How do you convert between metric and household systems?

A

Use conversion factors such as 1 tsp = 5 mL, 1 oz = 30 mL, and 1 cup = 240 mL.

75
Q

Convert 0.5 tsp to milliliters (mL).

A

0.5 tsp = 2.5 mL

76
Q

Convert 250 mg to grams (g).

A

250 mg = 0.25 g

77
Q
A

4 - PA 1 - Calculations (15 decks)

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