Question

4.6x10^22 atoms of an elements weigh 13.8 g. The atomic mass of the element is
(approximately)
a) 290
b) 180
c) 37.6
d) 27.6

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Its urgent.
But answer correctly.​

Answer 1

Hyy Dude

The answer is B

Given that 4.6 * 10^22 atoms of an element weight = 13.8gm.

Then the weight of 1 element = 13.8/4.6 * 10^22

                                                  = 3 /10^22

We know that the number of moles = number of atoms/6.02 * 10^23

                                                            = 3 * 6.02 * 10^23/10^22

                                                            = 180.6g

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