Which of these is a demonstration of a chemical change?
a. ice melting into water
b. wood becomes charred and black from burning
c. water evaporates from a sugar solution, leaving behind sugar crystals
d. a balloon suddenly popping
explain the answer : )

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

The boiling point of liquids is very high what does it indicate

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.