Acube of copper metal has a density of 8.96 g/cm3. the cube has a mass of 29.54 g. the atomic radius of a copper atom is 1.28 angstroms. how many atoms is the cube of copper metal?

The answer to your question is:  3.745 x 10 ²³ atoms

Explanation:

Data

density = 8.96 g/cm³

mass = 29.54 g

atomic radius = 1.28 A° 1.28 x 10⁻¹⁰ m

Volume of a cube

                              density = mass / volume

                              volume = mass / density

                              volume = 29.54 / 8.96

                              volume = 3.29 cm³

Volume of a copper atom

                              volume = (4/3) πr³

                              volume = (4/3) π (1.28 x 10 ⁻⁸)³

                                           = 8.784 x 10 ⁻²⁴ cm³

Number of atoms = 3.29 cm³ / 8.784 x 10 ⁻²⁴ cm³

                             = 3.745 x 10 ²³ atoms

your answers are a,b,,e and f

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answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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