The number of moles of K+ that are on 750 mL of the patient's blood is = 3.375moles.
How to calculate blood potassium levels
Since mmol is one-thousandth of a mole also a mEq is one-thousandth of an equivalent. Therefore both can be used interchangeably.
That is 4.5mEq/L of potassium = 4.5mmol/L
If 4.5 moles = 1000ml ( 1 liter =1000ml)
x mole = 750 ml
Make x the subject of formula,
x mole = 750 × 4.5 / 1000
= 3,375/1000
= 3.375moles
Therefore, the number of moles of K+ that are on 750 mL of the patient's blood is = 3.375moles.
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