Respuesta :

taskmasters
There are several information's of immense importance already given in the question. The answer to the question can be easily determined using those available information's. 

Mr of pure tungsten = 183.84
Mass of tungsten = Mole * Mr
                             = 0.7 * 183.84
                             = 128.7 gm
From the above deduction, it can be concluded that the correct option among all the options that are given in the question is the third option or the penultimate option.
Blacklash

Answer:

Option C is the correct answer.

Explanation:

Standard atomic mass of tungsten = 183.84 u

1 u = 1.66 x 10⁻²⁴ g

1 mol = 6.02 x 10²³ atoms

Mass of 0.7 mol tungsten = 0.7 x 6.02 x 10²³ x 183.84 x 1.66 x 10⁻²⁴ = 128.7 g

Mass of 0.7 mol tungsten = 128.7 g

Option C is the correct answer.