On the new scale , an a.m.u is ..... of C-12
Chemistry
Level
3
Atomic weight of Aluminium is found to be 18 while on conventional scale , it is 27 . On the new scale , an a.m.u is defined as ..... by weight of C-12.
The answer is 0.125.
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1 solution
On the conventional scale , an a.m.u is (1/12)th part by weight of C-12 isotope . So , the weight of Al is 27 ( Al is Aluminium) . On the new scale , it's weight is 18 . Now let's use the inverse relation between the part and weight . ---> 1/12 * 27 = .... 18 ---> 9/4 1/18 = .... ----> .....= 1/8 = 0.125