rpufall3374 rpufall3374

07-08-2017
Chemistry

contestada

What is the mass in kilograms of 1.20x 1028 atoms of copper, cu?

Respuesta :

ray2me123 ray2me123

08-08-2017

Mass of 1 atom of Cu=63.546 A.M.U
=63.546×1.66×10^(-27) kg
= 105.48636×10^(-27) kg
So,
Mass of 1.2×1038 atoms of Cu
= 1.2×1028×105.48636×10^(-27) kg
= 130127.973696×10^(-27) kg ANS !!!!

Note that: 1 A.M.U=1.66×10^(-27) kg

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