10. how is the mass number calculated for an element? a. the difference between the mass and the protons b. the sum of protons and neutrons c. the product of neutrons and protons d. there is no calculation.

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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