1.

15. 3.011 x 10-22 atoms of an elementweight.15 gm. The atomic mass of theelement is:

Answer»

Convert no of atoms to moles moles = No of atoms/Avagadro's numbermoles = (3.011*10^22)/(6.022*10^23)moles = 0.05

moles = given mass/atomic mass0.05 = 1.15/atomic mass

atomic mass = 1.15/0.05 = 23Element weight = 23

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