calculate the energy required to heat (22.5g) of liq water at 0c and change it to steam at 100c the specific heat capacity of liq water is 4.184 the molar heat of vaporization of water is (40.6kj)

Yes you are correct use the scientific method

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Ithink it’s one of those things that you put the object on

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.