A tank contain 4liters of Oxygen. The gas temperature is 20oC and the measured pressure is 20 x 105 N/m2. Determine the mass of Oxygen. Given; Patm = 1x105, O = 16, 1dm3 = 1L, R = 8.314 N/mol/K)

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

the answer is 75.0%.