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celinarubio77
20.01.2021 •
Chemistry
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Ответ:
Average atomic mass = 32 amu
Explanation:
Given data:
Abundance of X-30.00 amu = 30%
Abundance of X-32.00 amu = 50%
Abundance of X-35.00 amu = 20%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) +(abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (30×30)+(50×32)+(20×35) /100
Average atomic mass = 900 + 1600 +700 / 100
Average atomic mass = 3200 / 100
Average atomic mass = 32 amu.
Ответ:
Answer : The density of aluminium will be,![2.73g/cm^3](/tpl/images/0214/6569/21c1f.png)
Explanation :
Density : It is defined as the mass contained per unit volume.
Formula used for density :
Given :
Mass of aluminum = 74.6 grams
Volume =![27.3cm^3](/tpl/images/0214/6569/c0192.png)
Now put all the given values in the above formula, we get the density of aluminium.
Therefore, the density of aluminium will be,![2.73g/cm^3](/tpl/images/0214/6569/21c1f.png)