Question

please solve questions​

Answer 1

Step-by-step explanation:

the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.

Answer 2

$8 \sqrt{13} (6 \times 2 \sqrt{13} - 4 \sqrt{117} ) \\ 8 \sqrt{13}(12 \sqrt{13} - 4 \times 3 \sqrt{13} ) \\ 8 \sqrt{13} (12 \sqrt{13} - 12 \sqrt{13} ) \\ 8 \sqrt{13} \times 0 \\ \sf \implies 0$