Question

calculate the mass of the following: (a) 1.22 mol sodium (b) 14.5 mol copper

Answer 1

a) 1.22 mol sodium x 22.99 g/mole = 28.0 grams sodium 

b) 14.5 mol copper x 63.546 g/mole = 921 grams copper 

Answer 2

Answer:

(a) The mass of 1.22 mol sodium is equal to 28.06g.

(b) The mass of 14.5 mol of copper is equal to 920.75g.

Explanation:

Given, the number of moles of sodium = 1.22 moles

The atomic mass of sodium = 23g/mol

The mass of  1 mole of sodium = 23g

The mass of 1.22 mol of sodium = $={23} \times 1.22= 28.06g$

Similarly,

Given, the number of moles of copper = 14.5

The atomic mass of copper = 63.5g

So, mass of 1 mole of cooper = 63.5 g

The mass of 14.5 mol of copper $= 14.5\times 63.5 =920.75g$

Therefore, the mass of 1.22 mol of sodium and 14.5 mol of copper are 28.06g and 920.75g respectively.

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