Chemistry NCFE 2018-19 #16-28

Front

What is the ideal gas law?

Back

The ideal gas law is a fundamental equation in chemistry that relates the pressure (P), volume (V), temperature (T), and number of moles (n) of an ideal gas: PV = nRT, where R is the ideal gas constant.

Front

What is the relationship between moles of gas and volume at constant temperature and pressure?

Back

At constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas. This is described by Avogadro's Law.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is the empirical formula?

Back

The empirical formula is the simplest whole-number ratio of atoms of each element in a compound.

Front

How do you determine the molecular formula from the empirical formula?

Back

To find the molecular formula, divide the molecular mass by the empirical formula mass and multiply the subscripts in the empirical formula by that ratio.

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What is chemical equilibrium?

Back

Chemical equilibrium is the state in which the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.

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What is vaporization?

Back

Vaporization is the process by which a liquid turns into vapor, which occurs when molecules gain enough energy to overcome intermolecular forces.

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What is condensation?

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Condensation is the process by which vapor turns back into liquid, typically when the vapor cools and loses energy.

Front

What is the significance of coefficients in a balanced chemical equation?

Back

Coefficients indicate the relative number of moles of each substance involved in the reaction, which is essential for stoichiometric calculations.

Front

What is the molar mass of a compound?

Back

The molar mass of a compound is the mass of one mole of that compound, calculated by summing the atomic masses of all atoms in its molecular formula.