Explanation

• Sand does not dissolve in water.
• Unlike sugar, glucose, and salt, which are all soluble in water.

Explanation

The catalyst in Friedel-Crafts alkylation is AlCl3 (aluminum chloride).

Explanation

• As a result of the flow of energy (heat) from a region of high temperature to a region of low temperature: the warmer materials cool down and cooler materials warm up.
• This flow of energy is known as heat transfer.
• It occurs through conduction, convection, and radiation.
  
• As a result, the warmer materials lose energy and cool down, while the cooler materials gain energy and warm up.

Explanation

The percentage of a sample of HBr decomposes at 430 °C. is 0.1.

Explanation

Carboxylic acids with long hydrocarbon chains are called fatty acids.

Explanation

: CsCl has a body-centered cubic (bcc) structure, where each Cs⁺ ion is surrounded by 8 Cl⁻ ions and vice versa.

Explanation

The molar heat of vaporization for water is 40.7 kJ/mol, which is the energy required to vaporize one mole of water.

Explanation

Ammonia has a pH level of around 11-12, which is strongly alkaline (basic).

Explanation

The equation A+B → AB represents an addition reaction, where two substances (A and B) combine to form a new compound (AB).

Explanation

• Ionization energy is represented by the symbol ΔH (or Ei) and its unit is typically measured in kilojoules per mole (kJ/mol or kJmole-1).
• This represents the energy required to remove one mole of electrons from an atom or molecule.