Calculate the equilibrium number of vacancies per cubic meter for copper at 27°c and 1000°c, respectively. assume that the energy for vacancy formation is 0.9 ev/atom; the atomic weight and density (at both 27 and 1000 ° c) for copper are 63.5 g/mol and 8.4 g/cm3, respectively

i think its

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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explanation:

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 .