Question

2) Calculate no of moles in 204 g of
Aluminium oxide. (Given Al = 27 u , O=16
u) (2)​

Answer 1

Answer:

n= given mass

-------------------

molar mass

* molar mass = 27 +(16)2

= 27+32

=59

★ 204 g (given)

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59. g

★ no. of moles = 3.46 (approx)

Explanation:

when mass is given the mole is equal to given mass of substance by molar mass of substance