Which one of the following is an indication that a chemical reaction has occurred? a. formation of a salt
b. a change in the size of the material
c. reactant and product composition are not the same
d. a and c above

Hope the image of the frequency formula

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

Answer:   d.  carbon dioxide.