Question

An atom of oxygen weighs 2.656 10g Calculate the number of aroms in 2 g of oxygen​

Answer 1

Answer:

No. of atoms in 16g of oxygen = NA(6.022*10^23)

So No of atoms in 2 g of oxygen will be = NA*2/16

(Unitary Method)

which equals 7.5*10^22 atoms

Explanation:

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Answer 2

Answer: Atomic mass: Mass of an atom of an element, expressed in

Atomic mass: Mass of an atom of an element, expressed in atomic mass units

Atomic mass unit (amu): 1.661 x 10-24g

Atomic mass unit (amu): 1.661 x 10-24g Atomic weight: Average mass of all isotopes of a given

Atomic mass unit (amu): 1.661 x 10-24g Atomic weight: Average mass of all isotopes of a given element; listed on the periodic table

V. 1.

The main points of Dalton's atomic theory are: Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. ... A chemical reaction results in the rearrangement of atoms in the reactant and product compounds.

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