Chemistry, 07.10.2020 22:01, DojaCat

An atom has the following three isotopes: 24 amu (percent abundance = 78.99%)25 amu (percent abundance =10.00\%) , and 26 amu (percent bundance=11.01\%) . Calculate the average atomic mass. What is the identity of this atom based on your calculation?

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answered: dswitz6604

1. The average atomic mass of the element is 24.32 amu

2. The identity of the atom is Magnesium (Mg)

Let the 1st isotope be A

Let the 2nd isotope be B

Let the 3rd isotope be C

From the question given above, the following data were obtained:

For Isotope A

Mass of A = 24 amu

Abundance of A (A%) = 78.99%

For Isotope B

Mass of B = 25 amu

Abundance of B (B%) = 10%

For Isotope C

Mass of C = 26 amu

Abundance of C (C%) = 11.01%

Average atomic mass =?

The average atomic mass of the atom can be obtained as follow:

Atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(24 × 78.99)/100] + [(25 × 10)/100] + [(26 × 11.01)/100]

= 18.9576 + 2.5 + 2.8626

= 24.32 amu

Therefore, the atomic mass of the atom is 24.32 amu.

From the periodic table, the element having atomic mass of 24.32 amu is Magnesium (Mg).

Therefore, the identity of the atom is Magnesium (Mg)

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answered: spearjj

We multiply each mass with its percentage.
24*(78.99/100) = 18.96
25*(10/100)= 2.5
26*(11.01/100)= 2.86
Then add these together.
18.96+2.5+2.86= 24.32amu
An element that has an average mass of nearly 24.32amu would be Mg (magnesium)

answered: Guest

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

answered: Guest

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An atom has the following three isotopes: 24 amu (percent abundance = 78.99%)25 amu (percent abundan...