What is the mole to mole ratio of nitrogen to H2O

What were the success and failures that came to boyle’s excitements?

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6