Chemistry NCFE 2018-19 #16-28

Front

What is the ideal gas law and its formula?

Back

The ideal gas law relates the pressure, volume, temperature, and number of moles of a gas. The formula is PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the law of conservation of mass is obeyed, meaning the number of atoms of each element is the same on both sides of the equation.

Front

What is the molar mass of zinc (Zn)?

Back

The molar mass of zinc (Zn) is approximately 65.38 g/mol.

Front

What is the process of decomposition in chemistry?

Back

Decomposition is a chemical reaction where a single compound breaks down into two or more simpler products.

Front

What is the role of hydrochloric acid (HCl) in reactions with metals?

Back

Hydrochloric acid (HCl) acts as an acid that can react with metals to produce hydrogen gas and a metal chloride.

Front

What is the definition of a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the concept of equilibrium in a chemical reaction?

Back

Equilibrium in a chemical reaction occurs when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.

Front

What is the definition of a mole in chemistry?

Back

A mole is a unit of measurement in chemistry that represents 6.022 x 10^23 particles (atoms, molecules, ions, etc.) of a substance.

Front

What is the significance of temperature in gas laws?

Back

Temperature affects the kinetic energy of gas particles; higher temperatures increase particle movement, affecting pressure and volume.

Front

What is the definition of a saturated solution?

Back

A saturated solution is a solution that contains the maximum amount of solute that can be dissolved at a given temperature.