Answer:
24.309
Explanation:
mass×percentage+.. = average amu
23.985×78.7/100+24.986×10.13/100+25.983×11.17/100
to three decimal places
=24.309
Chemical energy
the energy stored in the bonds of atoms and molecules
Mg = 24.3 g/mol
23.5 g / 24.3 g/mol = 0.97 mol Mg
Answer: The gas, ethyne, C₂H₂, and the liquid benzene, C₆H₆, have the same percentage composition.
