Question

how can i convert 10mol% of SmCl3 to grams

Answer 1

Samarium chloride(III) has a molecular mass of 256.76 g/mol.

Mole percentage is number of moles of component per 100 moles of the solution. It is the mole fraction of the component multiplied by 100.

then   because  

where is the mole fraction of SmCl₃

= n_a/ (n_a+ n_b) and   =  n_b/ (n_a+ n_b)

From the above equations we infer that the ratio of n_a:n_b is 0.1: 0.9 or 1 : 9.

0.1 moles of SmCl₃ has a molecular mass of 0.1*  256.76 = 25.6 grams