Solid sodium and chlorine gas are formed by the decomposition of solid sodium chloride. Write a balanced chemical equation for this reaction.

a. a clone will be physically identical to the original, but won’t be genetically identical

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a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

i think it's letter a.