Question

multiple choice question which is an si unit for density? ○ cm³ ○ g/cm³ ○ g/l³ ○ ml/cm³

Explanation:

Density is defined as mass per unit volume. The SI unit for mass is kilogram (kg) and for volume is cubic meter ($m^3$), but commonly used non - SI unit for density is $g/cm^3$ (gram per cubic centimeter). Let's analyze each option:

• Option 1: $cm^3$ is a unit of volume, not density.
• Option 2: $g/cm^3$ is a unit of density as it represents mass (in grams) per unit volume (in cubic centimeters).
• Option 3: $g/L^3$ is not a standard unit for density. The correct unit related to liters would be $g/L$ (gram per liter) for density, and $L^3$ is incorrect.
• Option 4: $mL/cm^3$ is a unit for comparing volumes (since 1 mL = 1 $cm^3$, so $mL/cm^3$ is a dimensionless quantity related to volume equivalence, not density).

Answer:

B. $g/cm^3$ (assuming the options are labeled as A. $cm^3$, B. $g/cm^3$, C. $g/L^3$, D. $mL/cm^3$)