Answer:The rest of the energy were converted to heat energy
Explanation:
The chemical energy from the cell phone battery converted to both the sound energy and heat energy. No energy wasted, Energy always convert from one form to another form, it can never reduces or increases.
The answer is B between respiration and combustion
Number of moles Aluminium sulfide
1 mole of sulfide contains 150 g
Therefore; 16.2/150
= 0.108 moles
The mole ratio of Al2S3 : Al(OH)3 is 1:2
Therefore; moles of Aluminium hydroxide will be;
= (0.108 × 2)
= 0.216 moles
But, 1 mole of Al(OH)3 contains 77 g
Therefore, the mass of aluminium hydroxide is
0.216 moles × 77
= 16.632 g
Groups 3-12 (transition metals)
Group 13 (III) (boron group) 3
Group 14 (IV) (carbon group) 4
Group 15 (V) (pnictogens or nitrogen group)
