The Mass Density of Pure Water Is 1,000 Kg/m³

Multiple Choice

The mass density of pure water is 1,000 kg/m³. If the molecular mass of water is 18.0 u, how many water molecules are in spherical water balloon of radius 1.0 cm?

A) 1.0 × 10²³
B) 2.5 × 10²⁴
C) 1.4 × 10²³
D) 4.2 × 10²³