Where do most volcanoes on earth occur? a. on the ocean floor b. along the equator c. over hotspots d. on land

The answer is A. on the ocean floor.

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answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

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