Question

Atomic mass of some elements are given [Mg=24, O= 16) a) How many atoms are there in 120g Mg? b) Find the mass of 4 x 6.022 x 10 oxygen atoms.

Answer 1

Answer:

(a)5×6.022× 10^23atoms( b) 64g

Explanation:

no of moles of my = given mass of mg÷ molar mass of mg = 120÷24=5 moles

no of atoms = no of moles ×avogadro no.=5×6.022×10^23atoms

Answer 2

Answer:

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