level: Moles
Questions and Answers List
level questions: Moles
| Question | Answer |
|---|---|
| What are moles | A measure of chemical amounts |
| What is the avogadro number | 1 mole of any substance = 6.02x10^23 |
| RFM and mole | The RFM of a substance is equal to 1 mole of that substance |
| Equation for moles | mass/RFM |
| What is a limiting reactant | The reactant that is completely used up because the reaction stops when its used up |
| How do we make sure that no acid remains after a chemical reaction | an excess amount of other reactant |
| How do we calculate the number of moles when a substance is dissolved in solution | We use the solutions concentration |
| What are the two different units when we measure concentration and how do we het them | 1) Grams per decimetre cubed - mass/volume 2) Moles per decimetre cubed - moles/volume |
| How do you work out percentage yeild | Actual yeild/theoretical yeild |
| How do you work out atom economy | Mr of atoms of products/mr of reactants |