click below
click below
Normal Size Small Size show me how
Chemistry
Question | Answer |
---|---|
What is relative atomic mass? | The weighted mean mass of an atom compared to 1/12th of carbon 12. |
Calculate the mass of the following. 3.00 mol of Carbon | 36g. |
Calculate the following moles: 4g of Oxygen. | 0.25 moles. |
What is the gas formula? | Number of moles = voolume / 24dm3. |
Work out the number of moles: 36dm3 of an unspecified gas. | 1.5 mols. |
What is an acid? | An acid is a species that is a proton donor. |
What is an alkali? | An alkali is a type of base that dissolves in water to form hydroxide ions. |
What is a base? | A base is a species that is a proton acceptor. |
What is an isotope? | An isotope is an atom of the same element with a different number of protons. |
What number is Avogadro's constant? | 6.02*10^23 mol-1. |
Define Empirical Formula. | Empirical formula is the simplest whole-number ratio of atoms of each element present in a compound. |
What ions do acids release when added to water? | H+ ions. |
What are the products of a reaction between an acid and a carbonate? | Salt, CO2, H2O. |
What does Hydrated mean? | The term Hydrated refers to a crystalline compound containing water molecules. |
What does Anhydrous mean? | Anhydrous mean a substance that contains no water molecules. |