# How to convert the value of 1,80 mmol/L (hemoglobin) to g/L?

Well, haemoglobin has a molecular mass of $68000 \cdot g \cdot m o {l}^{-} 1$.
And thus $1.80 \times {10}^{-} 3 \cdot \cancel{m o l} \cdot {L}^{-} 1 \times 68000 \cdot g \cdot \cancel{m o {l}^{-} 1}$
$= 122.4 \cdot g \cdot {L}^{-} 1$