Consider a mercury atom (z=80,A=200) a-) calculate its mass in kg
b-) how many atoms of mercury does a drop of mercury contain ?
mp=1.67×10-27 kg=mn
volume of a drop =0.05 ml
p mercury =13.6×10*3 kg. m*-3

The answer is b because c don't explain why the moths are on them and it isn't a because as we know only one species of moth does this

Rate law for this reaction israte of the reaction = k[a]²[b].second order in a  means concentration of a in power of two, and  first order in b means concentration of b in power of one.

Acidichope this  

3-isopentane; 3-methylbutane, and 1,2-methylpropane do not meet iupac rules, so they are wrong names.the only valid name onthe list is 2-methylbutane, which is the same isopentane.this is its formula:                   ch2                    |ch3 - ch - ch2 - ch3answer: 2-methylbutane