wzorowane2 pktobliczenioweśrednie (szac.)
Determine the standard enthalpy change of the reaction, in kJ mol⁻¹. Use section 12 of the data booklet. Ignore interactions between ions and the solvent.
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Determine the standard enthalpy change of the reaction, in kJ mol⁻¹. Use section 12 of the data booklet. Ignore interactions between ions and the solvent.
Under which conditions does the gas behave most like an ideal gas? A. Helium at 200 kPa and 300 K B. Helium at 20 kPa and 600 K C. Sulfur dioxide at 20 kPa and 600 K D. Sulfur dioxide at 200 kPa and 300 K
Contrast the two isotopes in terms of atomic structure.
Calculate the relative atomic mass of chlorine from the sample, giving your answer to two decimal places.
(i) Deduce the condensed electron configuration of chlorine. (ii) Describe the bonding in a molecule of chlorine in terms of valence electrons. (iii) Explain why chlorine has a much lower boiling point than bromine, although both exist as simple diatomic…
Part of the lattice of potassium bromide, KBr, is shown in an expanded view. Which statement about the lattice of potassium bromide is correct? A. Each bromide ion is in contact with six potassium ions. B. Neighbouring ions are held together by shared pairs of…
What are the electron domain geometry and the molecular geometry of sulfur dioxide, ? A. Electron domain geometry: trigonal planar; molecular geometry: bent B. Electron domain geometry: trigonal planar; molecular geometry: trigonal planar C. Electron…
Which substance has dipole-dipole forces between its molecules? A. B. C. D.
Which statement best explains why aluminium can be drawn into thin wires? A. The delocalized electrons carry charge through the metal. B. The layers of aluminium ions can slide over each other while the delocalized electrons keep the lattice bonded. C.…
Which substance is a good conductor of electricity in the solid state? A. Graphene B. Diamond C. Silicon dioxide D. Silicon