Question

select all that apply
which are measurements of volume in the si system?

18.055 l
45 cm³
22.4 μl
23.03 nm

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Explanation:

1. Recall the SI units for volume. The base SI unit for volume is the cubic meter ($m^3$), but derived units like liter (L), cubic centimeter ($cm^3$), and microliter ($\mu L$) are also used to measure volume.

• $18.055\ L$: Liter (L) is a unit of volume (1 L = $1\ dm^3$ = $10^{-3}\ m^3$), so this is a volume measurement.
• $45\ cm^3$: Cubic centimeter ($cm^3$) is a unit of volume (1 $cm^3$ = $1\ mL$ = $10^{-6}\ m^3$), so this is a volume measurement.
• $22.4\ \mu L$: Microliter ($\mu L$) is a unit of volume (1 $\mu L$ = $10^{-6}\ L$ = $10^{-9}\ m^3$), so this is a volume measurement.
• $23.03\ nm$: Nanometer (nm) is a unit of length (1 nm = $10^{-9}\ m$), not volume, so this is not a volume measurement.

Answer:

A. $18.055\ L$, B. $45\ cm^3$, C. $22.4\ \mu L$