Calculations

Question 1

1 tsp=

Answer 1

5 mL

Question 2

1 tbsp=

Answer 2

15 mL

Question 3

1 fl.oz=

Answer 3

30 mL

Question 4

1 cup=

Answer 4

8 oz= 240 mL

Question 5

1 pint=

Answer 5

2 cups= 16 oz= 480 mL

Question 6

1 quart=

Answer 6

2 pints= 960 mL

Question 7

1 gallon=

Answer 7

4 quarts= 3840 mL

Question 8

1 kg=

Answer 8

2.2 lbs

Question 9

1 oz=

Answer 9

28.4 g (about 30 g)

Question 10

1 lb=

Answer 10

454 g

Question 11

1 grain=

Answer 11

65 mg

Question 12

1 inch=

Answer 12

2.54 cm

Question 13

1 meter=

Answer 13

100 cm

Question 14

Ca & other divalent ions

Answer 14

1 mEq= 0.5 mmol

Question 15

Furosemide IV:PO conversion

Answer 15

1:2; other loops=1:1

Question 16

Levothyroxine IV:PO conversion

Answer 16

0.75:1

Question 17

Metoprolol IV:PO conversion

Answer 17

1:2.5

Question 18

Aminophylline to Theophylline

Answer 18

ATM (multiply by 0.8)

Question 19

Theophylline to Aminophylline

Answer 19

Divide by 0.8

Question 20

calcium carbonate=

Answer 20

40% elemental calcium

Question 21

calcium citrate=

Answer 21

21% elemental calcium

Question 22

insulin conversion

Answer 22

normally 1:1; NPH dosed BID to daily glargine (use 80% of NPH dose); Toujeo to Lantus or Basaglar (use 80% of Toujeo dose)

Question 23

ferrous sulfate=

Answer 23

20% elemental iron

Question 24

5 mL lithium citrate syrup=

Answer 24

300 mg lithium carbonate= 8 mEq Li ion

Question 25

KCl 10% solution=

Answer 25

20 mEq/15 mL

Question 26

Statin potency (from strongest to weakest)

Answer 26

Pitavastatin, Rosuvastatin, Atorvastatin, Simvastatin, Lovastatin, Pravastatin, Fluvastatin

Question 27

BMI (kg/m^2)=

Answer 27

(weight (kg)/ (height (m)^2)

Question 28

BMI=

Answer 28

weight(lb)/ [height (inches)^2] * 703

Question 29

Express 0.04% as a ratio strength (convert to g/100 mL)

Answer 29

(0.04/100)= (1 part/x parts); x=2500; 1:2500

Question 30

Express 1:4,000 as a % strength

Answer 30

(1 parts/4000 parts)= (x/100); x= 0.025; 0.025%

Question 31

Express 0.00022% as parts per million (PPM) (move the decimal to the right 4 places)

Answer 31

(0.00022g/100 mL)= (x parts/1,000,000); x= 2.2 PPM

Question 32

Express 30 PPM of copper in solution as a % (move the decimal to the left 4 places)

Answer 32

(30 parts/1,000,000)= (x g/100 mL); x= 0.003%

Question 33

SG= (weight of substance (g) /weight of equal volume of water (g)

Answer 33

g/mL (M/V)

Question 34

Q1 (old quantity) * C1 (old concentration) =

Answer 34

Q2 (new quantity) * C2 (new concentration)

Question 35

Osmolarity measures the…

Answer 35

of particles/L of solution (mOsmol/L)

Question 36

mOsmol/L=

Answer 36

(weight in g/L)/MW (g/mole) [(# of particles)1,000]

Question 37

Body solutions are isotonic and solutions used in humans must match the tonicity of body fluid…

Answer 37

as closely as possible (has osmotic pressure= 0.9% NaCl)

Question 38

The dissociation factor (or ionization) for compounds is symbolized by the…

Answer 38

i

Question 39

Non-ionic compounds do not dissociate and have an i of…

Answer 39

1

Question 40

Compounds that dissociate into 2 ions will have an i of…

Answer 40

1.8 (keep adding 1.8 for each additional ion ex. 3,4,5 ions)

Question 41

The E-value is…

Answer 41

the relationship between the amount of drug that produces a particular osmolarity and the mount of NaCl that products the same osmolarity)

Question 42

E=

Answer 42

[(58.5)(i)]/[(MW of drug)(1.8)]

Question 43

mols=

Answer 43

g/MW

Question 44

mmols=

Answer 44

mg/MW

Question 45

mEq=

Answer 45

(mg*valence)/MW

Question 46

mEq=

Answer 46

mmols*valence