Draw an alcohol and an alkyl bromide that could be combined to give the ether shown.

See explanation

Explanation:

The question is incomplete, however, I found an example of this question on another site, so, I'm going to explain to you how to do it basing on this example, and then, apply it in your case. In the picture 1, is the example, and picture 2 is the solution.

Now, this type of reaction is known as the "Williamson Ether synthesis" and the overall of this, is a reaction that involves an alkoxyde ion with an primary alkyl halide like this:

RO- + R'X ------> ROR' + X-

This is a Sn2 reaction, and it's really fast.

Following the example in picture 1, the result is in picture 2. Hope this can help you.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.