dimensional analysis: a room measures 775 cm x 1400 cm x 260 cm. the density of oxygen is. 001429 g/cm^3. how many kilograms of oxygen are present in the room

The number in Kg of oxygen that are present in the room is

403.1209 kg

calculation

mass=density x volume

density = 0.001429 g / cm³

volume = 775 cm x 1400 cm x 260 cm = 2.821 x10^8 cm³

mass = 0.001429 g/cm³ x (2.8 x 10^8 cm³) = 403120.9 grams

convert g to Kg

that is 1 kg = 1000 g

? kg = 403120.9 g

by cross multiplication

=[ (403120.9 g x 1 kg) / 1000 g] = 403.1209 kg