Asolution of salt water is boiled. the water evaporates and solid salt remains. which statement is true?
a.
the salt and the water have both undergone chemical changes.
b.
the salt has undergone a physical change, and the water has undergone a chemical change.
c.
the salt and the water have both undergone physical changes.
d.
the salt has undergone a chemical change, and the water has undergone a physical change.

C=59(f−32)the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true? a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of 59 degree celsius. a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit. a temperature increase of 59 degree fahrenheit is equivalent to a temperature increase of 1 degree celsius. a) i onlyb) ii onlyc) iii onlyd) i and ii only