An "empty" container is not really empty if it contains air. How may moles of oxygen are in an "empty" two-liter cola bottle at atmospheric pressure (1 atm) and room temperature (25∘C)? Assume ideal behavior.

The number of moles present in the container N = 81.56

Explanation:

Pressure = 1 atm = 101325 K pa

Temperature = 298 K

Volume = 0.002

Gas constant for oxygen = = 0.26

From ideal gas equation

P V = m R T -------- (1)

Put all the values in above formula,

101325 × 0.002 = m × 0.26 × 298

⇒ m = 2.61 kg=  2610 gm

This is the mass of the gas.

Now no. of moles of the gas is calculated by

Mass of one mole of oxygen = 32 gm

N =

N = 81.56

These are the number of moles present in the container.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.