Final answer:
To calculate the mass of something given the volume in liters and density in kilograms per liter, use the formula Mass = Volume × Density. This formula is derived from the fact that density is defined as mass per unit volume. The correct option is a.
Step-by-step explanation:
To find the mass of an object when you know the volume in liters and the density in kilograms per liter, you can use the formula:
Mass = Volume × Density.
This relationship tells us that mass is directly proportional to both volume and density. For example, if an object has a volume of 2 liters and a density of 3 kg/L, its mass would be calculated as 2 L × 3 kg/L = 6 kg.
The density of a substance is a measure of its mass per unit of volume. It's often expressed in units like g/cm³ for solids and liquids, or g/L for gases. Keeping in mind these different units and using dimensional analysis can help in solving problems related to mass, volume, and density. Hence, a is the correct option.