Calculate the atomic percent of tungsten in an alloy prepared with 56 grams of tungsten and...

Calculate the atomic percent of tungsten in an alloy prepared with 56 grams of tungsten and 48 grams of aluminum. The atomic mass of tungsten is 183.85 g/mol and aluminum is 26.98 g/mol.

Expert Solution

Given mass of aluminium , m_Al =48 g

Mass of tungsten , m_W = 56 g

Total mass , M = m_Al + m_W = 48+56 = 104 g

Number of moles of Al , n_Al = m_Al / atomic mass of Al

= 48 g / 26.98 (g/mol)

= 1.78 mol

Number of moles of W , n_W = m_W / atomic mass of W

= 56 g / 183.85 (g/mol)

= 0.304 mol

Total number of moles , N = n_Al + n_W = 1.78+0.304 = 2.084

So atomic percent of tungsten = (n_W / N )x100

= (0.304/2.084)x100

= 14.6 %

queen_honey_blossom answered 1 year ago

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