the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
The increase in the average kinetic energy of the molecules needs the increase of temperature. The relation of ℃ and K is n ℃ = m K -273. So if we change all the K unit to ℃ unit, we can get the answer is (1).
Answer: option D. Atoms containd small negatively charged particles that are called electrons.
JJ Thompson carried out three important experiments with cathode rays. With them he proveed that cathode rays were negative charged particles and that the ratio charge/mass was so large that the particles either had a huge charge or had a very small mass, and he came up with the latter, defining that these negative charged particle were very small.
2C2H2 + 5O2 ---> 4CO2 + 2H2O
<span>mole ratio of O2:C2H2 is 2.5:1 </span>
<span>for 37 mol C2H2 you need 2.5 x 37 mol = 92.5 moles O2. </span>
<span>Thus, O2 is limiting.</span>
