How you can find gross and net mass?

To find gross mass, simply weigh the object including its packaging or container on a scale. To determine the net mass, subtract the weight of the packaging or container from the gross mass. This can be done by weighing the empty container first, then weighing the filled container and using the difference to calculate the net mass of the contents. Alternatively, if the packaging weight is known, you can directly subtract that value from the gross mass.