(a)
Interpretation: The condensed structural and line-angle formulas for heptane should be drawn.
Concept Introduction:
- In condensed structural formula, the organic structures of the compound are written in a line of text showing all the atoms in the molecule and omitting the vertical bonds.
- In line-angle formula, the organic structures of the compound are shown by zigzag lines in which each end and corner of the line represents carbon atom and the valency of each carbon atom is understood to be satisfied by hydrogen atoms.
(b)
Interpretation: Whether at room temperature, the heptane is a solid, liquid, or gas should be determined.
Concept Introduction: The boiling point is defined as the temperature at atmospheric pressure at which a material changes from a liquid-state to a gaseous state.
(c)
Interpretation: Whether heptane is soluble in water or not should be determined.
Concept Introduction: The solubility of a compound in a solvent is determined by the polarity of both that is the compound and the solvent. When the polarity of both the compound and the solvent is the same then the compound is soluble in solvent whereas when there is a difference in the polarity then they are insoluble.
(d)
Interpretation: Whether heptane will float on water or sink should be determined.
Concept Introduction: The density of a compound is defined the ratio of mass and volume. The mathematical expression for density is:
(e)
Interpretation: The complete equation for the combustion of heptane should be determined.
Concept Introduction: Chemical equation is written in such a way that the symbolic representation of reaction represents the reaction taking place in the system. The reactants are written on the left-hand side and the products are written on the right-hand side of the equation and are separated by an arrow, two or more reactants and products are separated by “+”.
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Basic Chemistry
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