Calculations

Question 1

1 oz

Answer 1

28.4 grams

Question 2

1 lb

Answer 2

454 grams

Question 3

1 grain

Answer 3

65 mg or 64.8 mg

Question 4

1 mEq =

Answer 4

1 mmol for monovalent ions

1/2 mmol for divalent ions

Question 5

ratio strength to percentage

Answer 5

100/ratio

Question 6

percentage strength to ratio

Answer 6

100/percentage

Question 7

PPM –> %

Answer 7

move decimal to left 4 places

Question 8

% –> PPM

Answer 8

move decimal to right 4 places

Question 9

SG

Answer 9

SG = g/mL

Question 10

osmolarity (mOsml/L)

Answer 10

mOsml/L = ( wt of substance [g/mL] / MW [g/mole] ) * # particles * 1000

Question 11

isotonicity (E value)

Answer 11

E = [(58.5)(i)] / [(MW drug)(1.8)]

Question 12

mols =

Answer 12

mols = g/MW

Question 13

mmols =

Answer 13

mmols = mg/MW

Question 14

mEq =

Answer 14

mEq = [mmols x valence] / MW

or

mmols x valence

Question 15

enteral nutrition calories

Answer 15

carbs, protein = 4 kcal/gram

fats = 9

Question 16

parenteral nutrition calories

Answer 16

dextrose monohydrate = 3.4 kcal/gram
amino acids = 4 kcal/gram
ILE 10% = 1.1 kcal/mL
ILE 20% = 2 kcal/mL
ILE 30% = 3 kcal/mL