Answer:
ΔH = 5102.88 KJ/mol
Explanation:
- Qp = ΔH = CpΔT... constant pressure
∴ Cp = 2.48 KJ/°C
∴ ΔT = 0.400°C
∴ Mw C8H18(g) = 114.22 g/mol
∴ mol C8H18(g) = (0.0222 g)×(mol C8H18/114.22 g) = 1.944 E-4 mol C8H18
⇒ ΔH = (2.48 KJ/°C)×(0.400°C) = 0.992 KJ
⇒ ΔH = 0.992 KJ/ 1.944 E-4 mol C8H18
⇒ ΔH = 5102.88 KJ/mol
Answer:
Mercury
Explanation: Under standard conditions mercury is a shiny, heavy, silvery liquid. It is the only metal that is liquid at room temperature.
Answer is: <span>C.)It will be closer to the mass of Vi–193.
</span><span>Average atomic mass of vitellium =
Ar(Vi-188) </span>· ω(Vi-188) + Ar(Vi-191) · ω(Vi-191) + Ar(Vu-193) · ω(Vi-193).
Average atomic mass of vitellium =
187.9122 amu · 0,10861 + 190.9047 amu · 0,12428 + 192.8938 amu · 0,76711.
Average atomic mass of vitellium = 20,409 + 23,725 + 147,970.
Average atomic mass of vitellium = 192,104.
Solution : As they have uniform composition throughout they are considered as homogeneous mixture. Both samples are mixture of two metals (gold and palladium) thus are alloys.
D. 0.2 M
The concentration of a solution is basically the ratio of the solute present to the solvent in the solution. This is an intrinsic property, independent of the amount of solution that is present. A similar example is that of density. No matter the size of a sample, the density and concentration of that sample remain constant.
