Ezekielcassese
30.06.2019 •
Chemistry
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
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Ответ:
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
Ответ:
Copper iodate
Explanation: