Across
- 9. The weighted average mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12.
- 11. A measure of the amount of solute dissolved in a given volume of solution. It is typically expressed in moles per cubic decimetre (mol/dm³).
- 13. he sum of the relative atomic masses of all the atoms in a chemical formula. It applies to compounds and is used in calculations involving moles and mass.
- 16. The mass of one mole of a substance, typically expressed in grams per mole (g/mol). For example, the molar mass of carbon dioxide (CO₂) is 44 g/mol.
- 17. The percentage by mass of each element in a compound, calculated by dividing the total mass of each element by the relative formula mass of the compound and multiplying by 100.
Down
- 1. The number of atoms, molecules, or ions in one mole of a substance, which is 6.02×10236.02 \times 10^{23}6.02×1023.
- 2. The reactant in a chemical reaction that is completely consumed first, limiting the amount of products formed.
- 3. The principle stating that mass is neither created nor destroyed in a chemical reaction. The mass of the products is always equal to the mass of the reactants.
- 4. The volume occupied by one mole of gas at room temperature (20°C) and pressure (1 atm), typically 24 dm³.
- 5. The maximum amount of product that can be formed in a reaction, based on the amount of limiting reactant.
- 6. The actual number of atoms of each element in a molecule of a compound.
- 7. The amount of product actually obtained from a reaction, which is usually less than the theoretical yield due to various factors like incomplete reactions or side reactions.
- 8. The reactant in a chemical reaction that remains when the reaction is complete. It is present in a greater amount than necessary to react with the limiting reactant.
- 10. A unit for measuring the amount of substance. One mole of any substance contains the same number of particles (atoms, molecules, ions, or electrons) as there are atoms in 12 grams of carbon-12. This number is Avogadro's constant, 6.02×10236.02 \times 10^{23}6.02×1023.
- 12. The volume occupied by one mole of a gas at a specified temperature and pressure. At RTP, the molar volume is 24 dm³/mol.
- 14. The ratio of the actual yield of a product to the theoretical yield, expressed as a percentage. It is calculated using the formula:
- 15. The simplest whole number ratio of atoms of each element in a compound.