Hi how statement about atomic structure is incorrect? a)protons are located in the nucleus b)protons and electrons the same mass. c)protons and electrons have opposite charges. d)neutral atoms contain the same number of protons and electrons.

Answer is: b) protons and electrons the same mass.

a) protons and neutrons are located in nucleus of an atom. Mass number is sum of protons and neutrons.

b) Protons and neutrons have nearly the same mass, while electrons are much less massive.

c) protons have positive and electrons have negative charge.

d) neutral atoms contain the same number of protons, for example, fluorine atom has 9 protons and 9 electrons.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

if you mean hydrogen and oxygen then water is the product