Consider 100 moles of a gas stream containing 15 mol% cs2, 18 mol% o2, and 67 mol% n2. the gas is fed to a continuous absorption tower, where it contacts liquid benzene, which absorbs cs2, but not o2 or n2. benzene is fed to a column in a 2: 1 mole ratio to the feed gas. some of the benzene entering as liquid evaporates and leaves the top of the tower as vapor. the gas leaving the absorber contains 2 mol% cs2 and 2 mol% benzene. how many independent material balances can you write?

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