Answer:
In my perspective I think its D because Electrical energy is converted to light and heat
<span>When a compound is decomposed into constituent elements, the amount of elements produced will remain in the same proportion every time it is decomposed. When the second sample of calcium fluoride is decomposed, the proportion of calcium and fluorine should remain same as first time.
Hence, calcium produced = 294 * 0.154/0.146 = 309 mg or 0.309 g</span>
B. <span>The heat lost by the metal will equal the heat gained by the water</span>