(Answered) A calculate the mass in kg of 1 atom of silver with three

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a) Calculate the mass in kg of 1 atom of silver with three significant figures.

b) how many atoms of oxygen are present in 2.43 g of O2 ?

c) Fill in the missing information in the table.

Symbol Na+ ---
Atomic number ----- 1
Protons 11 1
Neutrons --- ---
Mass number 23 3
Electrons -- 1

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