<span>Mn's
atomic number is 25 so you have 25 protons and 25 electrons in a
neutral atom. Since no charge is shown, the number of electrons is 25
Ni's atomic number is 28 so you have 28 protons and 28 electrons in a
neutral atom. This one shows a +3 so there are 3 missing electrons, the
number of electrons is 28 - 3 = 25
Cu's atomic number is 29 so you have 29 protons and 29 electrons in a
neutral atom. This one shows a +2 so there are 2 missing electrons, the
number of electrons is 29 - 2 = 27
Ti's atomic number is 22 so you have 22 protons and 22 electrons in a
neutral atom. This one shows a -2 so there are 2 EXTRA electrons, the
number of electrons is 22 + 2 = 24 </span>
The answer is 4.0 moles of magnesium
because...
..
...4.0mol Makmol O2 =3.0mol O2
Answer:
the overall reaction is
P4(s) + 10Cl2(g) => 4PCl5(g)
and its ΔH is
ΔH overall = (-1608 KJ)
Explanation:
given that
P4(s) + 6Cl2(g) => 4PCl3(g) , ΔH1 = –1148 kJ
4PCl3(g) + 4Cl2(g) => 4PCl5(g) , ΔH2 =–460 kJ
summing both equation gives
P4(s) + 6Cl2(g) +4PCl3(g) + 4Cl2(g) => 4PCl3(g) + 4PCl5(g)
but 4PCl3(g) is in both sides , so is cancelled out
P4(s) + 6Cl2(g)+ 4Cl2(g) => 4PCl5(g)
summing the Cl2(g)
P4(s) + 10Cl2(g) => 4PCl5(g) → overall reaction
(can be verified that the reaction is balanced)
since we sum both equations the ΔH of the overall reaction is also the sum of the ΔH of the individual reactions.
ΔH overall = ΔH1 + ΔH2 = (–1148 kJ) + (–460 kJ) = (-1608 KJ)
Answer:
The Rutherford Model shows an atom with electrons orbiting a fixed, positively charged nucleus in set, predictable paths. The Bohr model shows electrons travel in defined circular orbits around the nucleus.
