Zadanie 2a
Demonstrate that these data are consistent with the formula MgSO4 ⋅ 7 H2O.
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Demonstrate that these data are consistent with the formula MgSO4 ⋅ 7 H2O.
The uncertainty in each mass reading is ±0.04 g. (i) Calculate the percentage uncertainty in the total mass loss. (ii) Using your answer to (i), calculate the absolute uncertainty in the number of moles of water per mole of MgSO4, that is the…
Deduce what the graph shows about the water in hydrated magnesium sulfate.
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Give the full electron configuration of a nitrogen atom in its ground state and state how many of its electrons are unpaired.
(i) Draw a Lewis (electron dot) structure of the nitrite ion. (ii) Deduce the formal charges of the nitrogen atom and of both oxygen atoms, and add them to the structure you drew in (i). (iii) Predict the shape of the ion and the size of the O-N-O bond angle.…
Suggest a length, in pm, for the nitrogen-oxygen bonds in the nitrite ion and explain your choice. Use section 11 of the data booklet.
Chlorine molecules, Cl2, and bromine molecules, Br2, can both be split into atoms by radiation. Use section 12 of the data booklet. Explain how the wavelengths of radiation that can split Cl2 and Br2 molecules into atoms compare.
Atmospheric carbon dioxide and the pH of surface seawater were measured at a monitoring station over nineteen years. The graph shows the annual mean values. (i) Outline the relationship between the carbon dioxide mixing ratio and the pH of the seawater. (ii)…
(i) The ideal PMI, which corresponds to the greenest possible process, is 1. Estimate the ideal value of each of the other three metrics. (ii) Identify the metric in the table that cannot be affected by the choice of solvent. (iii) Suggest one reason why the…