A bottle of pure element was missing part of a label.The label said 2.258 x 1023 atoms.You determine the mass of the elements in the bottle to be 10.51946.What is the identity of this element?
A)B
B)N
C)Si
D)Sr

Question

Quizplus · Accepted Answer

First, we need to find the molar mass of the element using the given mass and Avogadro's number:
10.51946 g / (2.258 x 10^23 atoms) = 4.66 x 10^-23 g/atom
Next, we can compare this molar mass to the known molar masses of elements to find a match. The closest match is silicon (Si), which has a molar mass of 28.09 g/mol, or 4.66 x 10^-23 g/atom (rounded to two significant figures). Therefore, the missing label on the bottle was likely for pure silicon.

A Bottle of Pure Element Was Missing Part of a Label.The