Question

3.011x 10^22atoms of an element weight 1.15 gm. The atomic mass of the element is:
a) 10
(b) 2.3
(©) 35.5
(d) 23​

Answer 1

Answer:

No. of atoms /Avogadro number =Weight of element/atomic mass of elements

Atomic mass of element = weight of element * Avogadro No./No. of atoms

                                          = 1.15 * 6.022 * 10^23/3.011 * 10^22

                                          = 2.3 * 10

                                          =23

Therefore, option (D) is correct.

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