Inorganic Chemistry Answers

What are the key features of Rigid Unit Modes that allow for NTE? (5 marks)

The two cubic oxides ReO3and BaRuO3both adopt a cubic perovskite type structure; however whilst ReO3displays Negative Thermal Expansion (NTE) between 10 and 250 K BaRuO3displays Positive Thermal Expansion (PTE) over the same temperature range. The occurrence of NTE in ReO3 has been explained using the concept of Rigid Unit Modes.


Given both ReO3and BaRuO3contain the same structural frameworks what is the likely cause of the absence of NTE in BaRuO3?

Given both ScF3 and KCaF3 contain the same structural frameworks what is the like cause of the inhabitation of NTE in KCaF3

Explain the observation that the diffraction peaks in nanoparticles of ZrO2are extremely broad but these sharpen remarkably as the material is heated.

Explain the observation that the diffraction peaks in nanoparticles of ZrO2are extremely broad but these sharpen remarkably as the material is heated.

When 0.72g of a liquid vaporized at 110.0oC and 0.967atm, the gas occupies a volume of 0.417L. The empirical formula of the gas is CH2. What is the molecular formula of the gas?

Hydrogen gas is generated by the decomposition of water to fill a 1.1 kL weather balloon at 20°C and 100.0 kPa. What is the mass of hydrogen required?

Good day, 5Br−(aq)+BrO−3(aq)+6H+(aq)→3Br2(aq)+3H2O(l) The average rate of consumption of Br− is 1.06×10−4 M/s over the first two minutes. The average rate of formation of Br2 during the same time interval is 6.36·10-5 M/s. What is the average rate of consumption of H+ during the same time interval?Thanks

The compound ph3(As)2Cl2Rh(C4H7) shows two peaks in 1HNMR spectra at 60degree but at 30degree it shows three peaks relative intensities 3:2:2.explain with mechanism

What is coordination unsaturation and various factor affecting of these reactions