If a chemical reaction occurs in a flask, and the flask becomes colder, the reaction was exothermic. true or false

false

Explanation:

hope this helps you

False, if the flask becomes colder it's endothermic. I hope this helps! :)

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

hope it

and ur welcm

: )

c. 75.7

i think that is the right