Use of amount of substance in relation to masses of pure substances key terms

Mole

A unit of measurement for the amount of substance, representing 6.02 x 10^23 particles. In Moles (HT only), this term helps explain (HT only) State that chemical amounts are measured in moles for AQA GCSE Chemistry 8462 Unit 4.3.

Relative Formula Mass

The mass of a formula unit of a compound, calculated as the sum of the relative atomic masses of its constituent atoms.

Mole

The unit of measurement for the amount of substance, symbolized as 'mol'. In Moles (HT only), this term helps explain (HT only) State that the symbol for the unit mole is mol for AQA GCSE Chemistry 8462 Unit 4.3.

Relative Formula Mass

The mass of one mole of a substance in grams, numerically equal to the sum of the relative atomic masses of all atoms in its formula.

Mole

A unit of measurement for the amount of substance, defined as containing 6.02 x 10^23 particles.

Relative Formula Mass

The sum of the relative atomic masses of all atoms in a chemical formula, expressed in grams per mole.

Mole

A unit of measurement for the amount of substance, defined as containing exactly 6.02 x 10^23 particles.

Avogadro constant

The number of atoms, molecules, or ions in one mole of a substance, approximately 6.02 x 10^23.

Avogadro constant

The number of atoms, molecules, or ions in one mole of a substance, approximately 6.02 x 10^23.

Mole

The unit of measurement for the amount of substance, symbolized as 'mol'. In Moles (HT only), this term helps explain (HT only) Define the Avogadro constant as the number of atoms, molecules or ions in one mole of a substance for AQA GCSE Chemistry 8462 Unit 4.3.

Avogadro constant

The number of atoms, molecules, or ions in one mole of a substance, approximately 6.02 x 10^23.

Mole

A unit of measurement for the amount of substance, defined as containing 6.02 x 10^23 particles.

Mole

A unit of measurement for the amount of substance, defined as containing 6.02 x 10^23 particles.

Avogadro constant

The number of atoms, molecules, or ions in one mole of a substance, approximately 6.02 x 10^23.

Relative Formula Mass

The sum of the relative atomic masses of all atoms in a chemical formula. In Moles (HT only), this term helps explain (HT only) Use relative formula mass to calculate the number of moles in a given mass of a substance for AQA GCSE Chemistry 8462 Unit 4.3.

Mole

A unit of measurement for the amount of substance, defined as containing 6.02 x 10^23 particles.

Mole

A unit of measurement for the amount of substance, representing 6.02 x 10^23 particles. In Moles (HT only), this term helps explain (HT only) Use the number of moles and relative formula mass to calculate the mass of a substance for AQA GCSE Chemistry 8462 Unit 4.3.

Relative Formula Mass

The sum of the relative atomic masses of all atoms in a chemical formula. In Moles (HT only), this term helps explain (HT only) Use the number of moles and relative formula mass to calculate the mass of a substance for AQA GCSE Chemistry 8462 Unit 4.3.

Mole

A unit of measurement for the amount of substance, defined as containing 6.02 x 10^23 particles.

Relative Formula Mass

The sum of the relative atomic masses of all atoms in a chemical formula, used to calculate moles.

Mole

The unit of measurement for the amount of substance, symbolized as 'mol'. In Moles (HT only), this term helps explain (HT only) Recognise and use decimal form in mole calculations. (MS 1a) for AQA GCSE Chemistry 8462 Unit 4.3.

Decimal Form

A numerical representation that uses a decimal point to denote fractions of whole numbers.

Avogadro constant

The number of atoms, molecules, or ions in one mole of a substance, approximately 6.02 x 10^23.

Standard form

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, typically in the format a x 10^n.

Significant Figures

Digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in the decimal portion.

Amount of Substance

A measure of the quantity of substance, expressed in moles, that relates to the number of particles present.

mathematical symbols

Symbols used to represent mathematical concepts, such as = for equality, < for less than, > for greater than, and proportionality symbols.

approximate relationships

Relationships that indicate a rough or estimated equivalence between quantities, rather than an exact value.

Balanced Chemical Equation

An equation that shows the reactants and products of a chemical reaction with equal numbers of atoms for each element on both sides.

Mole Ratio

The ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Balanced symbol equation

A chemical equation where the number of atoms for each element is the same on both sides, ensuring the law of conservation of mass is followed.

Mass calculation

The process of determining the mass of reactants or products in a chemical reaction using the mole concept and balanced equations.

Balanced symbol equation

An equation that shows the reactants and products of a chemical reaction with equal numbers of atoms for each element on both sides.

Mass calculation

The process of determining the mass of reactants or products in a chemical reaction using the balanced equation and known quantities.

Balanced symbol equation

A chemical equation where the number of atoms for each element is the same on both sides, ensuring mass conservation.

Mass of products

The total mass of substances formed in a chemical reaction, calculated from the balanced equation and the mass of reactants.

mole ratio

The ratio of the amounts in moles of reactants and products in a balanced chemical equation.

balanced equation

A chemical equation in which the number of atoms for each element is the same on both sides, ensuring mass conservation.

reacting-mass calculations

Calculations that involve determining the masses of reactants and products in a chemical reaction using ratios and percentages.

ratios

A relationship between two quantities, indicating how many times one value contains or is contained within the other, often used in calculations involving moles.

algebraic equation

An equation that includes variables and constants, which can be solved for the values of the variables.

appropriate units

Units that are suitable for the quantities being measured or calculated, ensuring consistency and accuracy in calculations.

reacting-mass calculations

Calculations that determine the masses of reactants and products in a chemical reaction based on balanced equations.

subject of an equation

The variable in an equation that is isolated on one side, allowing for the calculation of its value based on other known quantities.

decimal form

A numerical representation that uses a decimal point to separate the whole number from the fractional part.

mass calculation

A mathematical process used to determine the mass of a substance based on its amount in moles and relative formula mass.

Mole

The amount of substance that contains the same number of entities as there are atoms in 12 grams of carbon-12.

Balanced equation

A chemical equation in which the number of atoms for each element is the same on both sides, reflecting the conservation of mass.

Mole Ratio

The ratio of the amounts in moles of reactants and products in a balanced chemical equation.

Whole-Number Ratio

A ratio that expresses the relative amounts of substances in whole numbers, derived from mole ratios.

Mole Ratio

The ratio of the amounts in moles of reactants and products in a balanced chemical equation.

Balanced Equation

A chemical equation that has the same number of each type of atom on both sides, reflecting the conservation of mass.

Balanced equation

A chemical equation that has the same number of each type of atom on both sides, ensuring the law of conservation of mass is followed.

Reactant

A substance that undergoes a chemical change in a reaction, typically found on the left side of a balanced equation.

Mole calculations

Mathematical processes used to determine the amount of substance in moles based on mass and relative formula mass.

Changing the subject of an equation

The process of rearranging a mathematical equation to isolate a specific variable.

Mole

The unit of measurement for the amount of substance, symbolized as 'mol'. In Using moles to balance equations (HT only), this term helps explain (HT only) Substitute numerical values into equations using appropriate units. (MS 3c) for AQA GCSE Chemistry 8462 Unit 4.3.

Balanced equation

A chemical equation in which the number of atoms for each element is equal on both sides, ensuring mass conservation.

Mole Ratio

The ratio of the amounts in moles of reactants and products in a balanced chemical equation.

Mass Ratio

The ratio of the masses of reactants and products in a chemical reaction. In Using moles to balance equations (HT only), this term helps explain (HT only) Avoid confusing mole ratios with mass ratios when balancing equations from data for AQA GCSE Chemistry 8462 Unit 4.3.

Limiting reactant

The reactant that is completely used up in a chemical reaction, determining the maximum amount of product formed.

Excess reactant

The reactant that remains after the limiting reactant is completely consumed in a chemical reaction.

Excess reactant

A reactant that is present in a quantity greater than necessary to completely react with the limiting reactant.

Limiting reactant

The reactant that is completely consumed in a chemical reaction, determining the maximum amount of product formed.

Limiting reactant

The reactant that is completely used up in a reaction, determining the maximum amount of product formed.

Product yield

The amount of product obtained from a chemical reaction, which can be affected by the limiting reactant.

Limiting Reactant

The reactant that is completely used up in a chemical reaction, determining the maximum amount of product formed.

Mole

A unit of measurement for the amount of substance, defined as containing 6.02 x 10^23 particles.

Limiting reactant

The reactant that is completely used up in a reaction, determining the maximum amount of product formed.

Mass in grams

The measurement of the amount of a substance expressed in grams, used to calculate limiting reactants.

Limiting reactant

The reactant that is completely used up in a reaction, determining the maximum amount of product formed.

Balanced equation

A chemical equation in which the number of atoms for each element is the same on both sides, ensuring mass conservation.

Limiting reactant

The reactant that is completely used up in a reaction, determining the maximum amount of product formed.

Percentage yield

The ratio of the actual yield of a product to the theoretical yield, expressed as a percentage.

Concentration

The amount of solute present in a given volume of solution, often expressed in g/dm^3.

Mass per Volume

A way to express concentration, indicating the mass of solute in grams for each cubic decimeter of solution.

Concentration

A measure of the amount of solute present in a given volume of solution, often expressed in grams per cubic decimetre (g/dm^3).

g/dm^3

The unit of concentration representing grams of solute per cubic decimetre of solution. In Concentration of solutions, this term helps explain use grams per cubic decimetre, g/dm^3, as a unit of concentration for AQA GCSE Chemistry 8462 Unit 4.3.

Concentration

The amount of solute present in a given volume of solution, typically measured in grams per cubic decimetre (g/dm³).

Solute

The substance that is dissolved in a solution, resulting in a homogeneous mixture. In Concentration of solutions, this term helps explain calculate the mass of solute in a given volume of solution of known concentration for AQA GCSE Chemistry 8462 Unit 4.3.

Concentration

The amount of solute present in a given volume of solution, often expressed in grams per cubic decimetre (g/dm³).

Solute

The substance that is dissolved in a solution, resulting in a homogeneous mixture. In Concentration of solutions, this term helps explain calculate concentration when given mass of solute and volume of solution for AQA GCSE Chemistry 8462 Unit 4.3.

Concentration

The amount of solute present in a given volume of solution, often measured in grams per cubic decimetre (g/dm^3).

Volume

The amount of space that a substance occupies, typically measured in cubic decimetres (dm^3) or cubic centimetres (cm^3).

Concentration

The amount of solute present in a given volume of solution, often expressed in g/dm^3.

Ratio

A relationship between two quantities, indicating how many times one value contains or is contained within the other.

Concentration

The amount of solute present in a given volume of solution, typically measured in grams per cubic decimetre (g/dm^3).

Rearranging equations

The process of manipulating an equation to isolate a specific variable, such as concentration, mass, or volume.

Concentration

The amount of solute present in a given volume of solution, often expressed in g/dm^3.

Solute

The substance that is dissolved in a solution, resulting in a homogeneous mixture. In Concentration of solutions, this term helps explain (HT only) Explain how mass of solute and volume of solution are related to concentration for AQA GCSE Chemistry 8462 Unit 4.3.

mass concentration

The mass of solute per unit volume of solution, typically expressed in grams per cubic decimetre (g/dm^3).

amount concentration

The amount of substance per unit volume of solution, usually expressed in moles per cubic decimetre (mol/dm^3).