Umiejętności z tego działu sprawdza 35 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 27 z 54 arkuszy w bazie.
(i) The first step is the catalytic oxidation of ammonia gas to nitrogen monoxide. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) Determine the volume, in dm3, of nitrogen monoxide produced from 20.0 g of ammonia, at STP, using section 2 of the data booklet.…
The student repeated the experiment using Method 2, with the same quantities of acid and solid. (i) Calculate the volume of gas that will have collected in the measuring cylinder once the reaction has finished, measured at T = 22 °C and…
What will be the volume of 4.00 dm3 of gas that has had the pressure decreased from 150 kPa to 50.0 kPa, and its temperature increased from 27.0 °C to 127 °C? A. 16.0 dm3 B. 12.0 dm3 C. 56.4 dm3 D. 1.78 dm3
Iodine crystals, I2(s), were sealed in a flask and left until an equilibrium was reached with violet vapour above the crystals. I2(s) ⇌ I2(g) (i) Name the change of state from I2(s) to I2(g) and state the type of force between…
(i) Sulfur dioxide is oxidized to sulfur trioxide by nitrogen dioxide in the atmosphere. Determine the enthalpy change, ΔH⊖, in kJ mol−1, for the reaction SO2(g) + NO2(g) → SO3(g) + NO(g) given these reactions and enthalpy…
Methane behaves almost as an ideal gas at room temperature and atmospheric pressure. Under which conditions would the molar volume of methane deviate most from the value predicted for an ideal gas? A. Low temperature and high pressure B. Low temperature and…
A fixed amount of an ideal gas is kept at constant temperature while its pressure P is changed. Which graph gives a straight line passing through the origin? A. V against P B. 1/V against 1/P C. PV against P D. V against 1/P
Sodium azide, NaN3 (Mr = 65.0), decomposes on heating to form sodium and nitrogen gas. 2 NaN3(s) → 2 Na(s) + 3 N2(g) What volume of nitrogen is produced from 26.0 g of sodium azide at STP? A. 6.05 dm3 B. 9.08 dm3…
The sealed vessel was left for the reaction to proceed. Suggest two properties of the system, other than its colour, that could be measured to follow the progress of the reaction over time, and predict how each would change as the forward reaction proceeds.
(i) Write a balanced equation, with state symbols, for this reaction. (ii) Deduce which of the two reactants runs out first, that is, which one limits the reaction. Use sections 1, 4 and 7 of the data booklet. (iii) Calculate the volume, in dm3,…
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