The normal boiling point of a certain liquid x is 120.7°c , but when 58.66g of urea nh22co are dissolved in 950.g of x , it is found that the solution boils at 123.0°c instead. use this information to calculate the molal boiling point elevation constant kb of x .

Explanation:

Formula used for Elevation in boiling point :

or,

where,

= change in boiling point

= boiling point constant

m = molality

moles of solute 9urea)=

Putting in the values we get:

Thus molal boiling point elevation constant is

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

sure im new too!

explanation: