Noel carries out the thermal decomposition of calcium carbonate shown below. Besides the calcium carbonate and the calcium oxide, what else would he have needed to measure in order to see evidence of the conservation of mass? Give the full name of the substance

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.