1. <span>number of electrons
2.Si
3.Cu
4.There are three positively charged proton in the nucleus
5.mass number
6. A physical substance occur in A and a chemical change occur in B
7.53
8. dont know what you talking about.sorry
9. Independent variable
10.7.5g
This is an answer I can come up with.</span>
Is constant (matter that has a composition that is the same everywhere)
In nmr spectroscopy the aromatic hydrogens show multiplets near 7-8 δ
so if the given aromatic compound undergoes reduction, there will be reduction of aromatic ring and the peaks near the given values will not be observed making it clear that benzene ring of methyl cinnamate was reduced during the hydrogenation