Zadania z chemii IB HL

(i) The boxes for the 1s and 2s orbitals of a sulfur atom are shown below. Draw the remaining orbitals needed for its ground-state electron configuration, filling and labelling each one. Use section 7 of the data booklet. (ii) For a sulfur atom, sketch the…

4.81 g of sulfur was heated in a stream of chlorine gas until the reaction was complete. The mass of the chloride produced was 10.13 g. (i) Calculate how many atoms are present in this 4.81 g sample of sulfur. Use sections 2 and 7 of the data booklet. (ii)…

Sulfur forms a dichloride, $\ce{SCl2}$, and a hexafluoride, $\ce{SF6}$. (i) Deduce the Lewis formula of $\ce{SCl2}$. (ii) Deduce the molecular geometry of $\ce{SCl2}$ and of $\ce{SF6}$. (iii) Suggest a value for the bond angle in $\ce{SCl2}$.

Which term describes the change of state shown in the equation below? $\ce{I2(s) -> I2(g)}$ A. Deposition B. Melting C. Evaporation D. Sublimation

Titanium is not included in the graph. Use sections 9 and 10 of the data booklet to find its atomic radius and first ionization energy, and annotate the graph with a cross (X) at the position of the data point for titanium.

Suggest what causes the two quantities in the graph to be related in this way.

The data show that the first ionization energy and the atomic radius are related. (i) State what kind of relationship links the two variables. (ii) Compare and contrast the trends observed for the three groups.

Outline one reason why $\ce{SO2}$ is considered a pollutant.

A sample of flue gas has a volume of $2.5 \times 10^{-3}\ \mathrm{m^3}$ at 150 °C and $1.2 \times 10^5$ Pa, and contains 0.20 % $\ce{SO2}$ by volume. Using sections 1 and 2 of the data booklet, calculate the amount, in moles, of $\ce{SO2}$ present.