The main idea is the first sentence (1). The rest of the sentences support the main idea that cockroaches have some amazing characteristics.
Its the one that sounds the best that you really like doing so thats what i think about.
Definitions is usually what all dictionaries provide.
It is B. (Does) she (have) any sisters?
To get from moles to grams you would use molar mass. The molar mass of MgCl2 is 95.211. The equation would look as so:
<u>88.1 mol MgCl</u><span><u>2</u> x <u>95.211 g </u></span><u>MgCl</u><span><u>2</u> = </span><span>8388.0891 g MgCl2 </span><span>
1 1 mol</span>