Chemistry / Chemie - 124
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Which of the ions below has a noble gas electron configuration? | Watter van die onderstaande ione besit die edelgas konfigurasie? |
| Give a set of quantum numbers to describe the electron lost when an atom from the alkali metals in the fifth period ionizes. | Gee 'n stel kwantumgetalle wat die elektron kan verteenwoordig wat verloor word wanneer 'n atoom van die alkali metale in die vyfde periode ioniseer. |
| n = ; ℓ = ; mℓ = ; ms = |
Which | Watter |
Which sets of three quantum numbers (n, ℓ, mℓ) correspond to a 2p orbital? | Watter stelle van drie kwantumgetalle (n, ℓ, mℓ) stem ooreen met 'n 2p-orbitaal? |
Which of the following orbitals might have an mℓ equal to -1? | Watter van die volgende orbitale kan ‘n mℓ van -1 besit? |
Which of the following sets of quantum numbers are not permissible? | Watter van die volgende stelle kwantumgetalle is nie toelaatbaar nie? |
How many electrons can be described by the quantum numbers n = 3, ℓ = 1, mℓ = 0, ms = +1/2? | Hoeveel elektrone kan beskryf word deur die kwantumgetalle n = 3, ℓ = 1, mℓ = 0, ms = +1/2? |
| The enthalpy change for the formation of NO(g) from its elements, as indicated below, cannot be measured directly because the reaction is reactant favoured. | Die entalpieverandering vir die vorming van NO(g) vanaf sy elemente, soos hieronder aangedui, kan nie direk bepaal word nie, want die reaksie is reaktant gedrewe. |
Use Hess's Law as well as the enthalpy changes for the reactions below, which was determined experimentally, to determine the enthalpy change (in kJ) of formation for NO(g). | Gebruik Hess se Wet sowel as die entalpieveranderinge vir die reaksies hieronder, wat eksperimenteel bepaal is, om die entalpieverandering (in kJ) vir die vorming van NO(g) te bepaal. |
N2(g) + 3 H2(g) → 2 NH3(g) ΔHo = -91.1 kJ. mol-1 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) ΔHo = -906.2 kJ.mol-1 H2(g) + |
Calculate the change in enthalpy for the following reaction, using the appropriate standard enthalpies of formation given below. ΔfH°[FeCℓ3(s)] = -412 kJ mol-1 ΔfH°[FeCℓ2(s)] = -360 kJ mol-1 ΔfH°[HCℓ(aq)] = -167.1 kJ mol-1 ΔfH°[HCℓ(g)] = -127 kJ mol-1 | Bereken die entalpie-verandering vir die volgende reaksie met behulp van die toepaslike standaard vormingsentalpieë hieronder. ΔfH°[FeCℓ3(s)] = -412 kJ mol-1 ΔfH°[FeCℓ2(s)] = -360 kJ mol-1 ΔfH°[HCℓ(aq)] = -167.1 kJ mol-1 ΔfH°[HCℓ(g)] = -127 kJ mol-1 |
2 FeCℓ2(s) + 2 HCℓ(g) → 2 FeCℓ3(s) + H2(g)
| For which one of the following reactions is ΔrxnH° equal to the heat of formation (ΔfH°) of the product? | Vir watter van die volgende reaksies is ΔrxnH° gelyk aan die vormingswarmte (ΔfH°) van die produk? |
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