Calculate the moles of cu in 7.4×1021 atoms of cu.
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Ответ:
?? moles 7.4x10²¹ atoms
moles = 7.4x10²¹ / 6.02x10²³
= 0.01229 moles
hope this helps!
Ответ:
I think the answer is Chemists have selected a number of particles with which to work. Hope it helps and stay healthy :)