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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…
State the overall reaction of the cycle and determine its enthalpy change, in kJ mol−1.
Use bond enthalpies to calculate the enthalpy change, in kJ mol−1, for the first reaction. Br ∙ (g) + O3(g) → BrO ∙ (g) + O2(g) Use section 12 of the data booklet and the table below.
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
What is the correct formula of calcium phosphide? A. Ca3P2 B. Ca2P3 C. CaPO4 D. Ca3(PO4)2
Which compounds contain ionic bonds? I. SiO2 II. CH3COONa III. MgO A. I and II only B. I and III only C. II and III only D. I, II and III
Chrome alum has the formula KCr(SO4)2 ⋅ 12 H2O. Which option shows the charges of the ions that make up this salt, in the order potassium, chromium, sulfate? A. K+, Cr2+, SO42− B. K+, Cr3+, SO43− C.…
Which properties are expected for the compound lithium bromide? A. Not soluble in water, low melting point, does not conduct electricity when solid, does not conduct electricity when molten B. Not soluble in water, low melting point, conducts electricity when…
The structure of dimethylamine, (CH3)2NH, is shown. What are the molecular geometries around a carbon atom and around the nitrogen atom? In each option the geometry around carbon is given first and the geometry around nitrogen second. A. Trigonal…
Which statement about diamond, carbon dioxide and silicon dioxide is correct? A. The central atoms in carbon dioxide and in silicon dioxide have the same electron domain geometry B. Diamond and carbon dioxide both have high melting points C. Diamond and…