Is it science subject or math
The answer is 4. It can hold 4 sublevels as s.p,d,f and it holds 32 electrons
Answer:
0.20 moles
Explanation:
The pressure is proportional to the quantity of gas at a given temperature and volume. So, the quantity needs to be increased by a factor of ...
(35 psi)/(29.2 psi) = 175/146 ≈ 1.19863
The fractional increase required is ...
1.19863 -1 = 0.19863
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The quantity of air currently in the tire is ...
1 mol·519.67°R/(atm·23.6442 L) × (29.2/14.7 atm) × (11.6 L) / (45+459.67)°R
= 1.0035 mol
so we need to add ...
(fraction to add) × (current quantity) = amount to add
0.19863 × 1.0035 mol = 0.1993 mol = amount to add
About 0.20 moles of air must be added to the tire to bring the pressure up.
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)
