You need to calculate the atomic weight of that element.
number of moles = mass / atomic weight
atomic weight = mass / number of moles
atomic weight = 209.1 / 3 = 69.7 g/mol
The element produced will be gallium, Ga.
Answer:
The element produced is gallium, Ga
Explanation:
Given:
Moles of the product = 3 moles
Weight of the product = 209.1 g
To determine:
The identity of the product formed i.e. the unknown element
Calculation:
The identity of element can be deduce from its atomic weight and comparing the calculated weight to that of the elements in the periodic table.
[tex]Number\ of\ moles = \frac{mass\ of\ the\ element}{atomic\ weight}[/tex]
[tex]Atomic\ weight = \frac{mass\ of\ the\ element}{number\ of\ moles}[/tex]
In this case:
[tex]Atomic\ weight = \frac{209.1\ g}{3\ moles} = 69.7\ g/mol[/tex]
From the periodic table, the element with an atomic mass = 69.7 g/mol is gallium, Ga
