A graduated cylinder has mass of 50 g when empty When 30 ml of water is?

added, the total mass of the graduated cylinder becomes 80 g. This indicates that the mass of the 30 ml of water is 30 g, since the mass of the empty graduated cylinder is 50 g (80 g - 50 g = 30 g). Therefore, the water's density can be calculated as mass divided by volume, which is 30 g / 30 ml = 1 g/ml, consistent with the density of water.