Question

gram-atomic mass.
2. An atom of oxygen weighs 2.656 x 10-23 g. Calculate the number of atoms in 4 g of oxygen.
[1.51 x 10231
3. An atom of magnesium weighs 3.98 x 10-23 g. Calculate the number of atoms in 12 g of magnesium.
[3.015 x 10231
V. LONG ANSWER QUESTION
1. Write important points of Dalton's Atomic theory of matter.​

Answer 1

ANSWER:

2. 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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Answer 2

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