1816674
Description
Flashcards by Megan Vann, updated more than 1 year ago
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Created by Megan Vann
almost 11 years ago
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| Question | Answer |
| What is molar mass the same as? | The relative molecular mass. |
| How do you work out moles? | Mass Moles=-------------------- Molar mass/ Mr |
| How do you work out concentration? | Moles Concentration=---------------------------- Volume in dm^(3) |
| How do you convert cm^(3) to dm^(3)? | divide by 1000. |
| What is the volume of any gas at room temperature pressure? (298K/25C and 100kPa) | 24dm^(3) |
| How do you work out the moles in a volume of gas at ROOM TEMP PRESSURE. | Volume in dm^(3) Number of moles=----------------------------- 24 |
| What is the ideal gas equation? | pV= nRT |
| What is 'P' in the ideal gas equation and what are its units? | Pressure (Pa) |
| What is 'V' in the ideal gas equation and what are its units? | Volume (m^(3)) |
| How do you convert cm^(3) to m^(3)? | divide by 1,000,000 |
| What is 'R' in the ideal gas equation and what is its units? | The gas constant. ALWAYS 8.31 JK^(-1)mol^(-1) |
| Define relative atomic mass. | Average mass of an atom of an element ----------------------------------- 1/12 x mass of one atom of 12C |
| Define relative molecular mass. | average mass of one molecule of an element --------------------------------------- 1/12 x mass of one atom of 12C |
| how many particles does one mole contain? ( Avogadro constant) | 6.023 x 10^(23) |
| What is T in the ideal gas equation and what is its units? | Temperature in Kelvin ( K) - add 273 to Celsius. |
| What is empirical formula? | The simplest whole number ratio of atoms of each element in a compound. |
| What is molecular formula? | The actual number of atoms of each element in one molecule. |
| How do you calculate % atom economy? | mass of desired product --------------------------------- x100 total mass of reactants |
| How do you calculate percentage yield? | actual yield ------------------ x100 Theoretical yield |
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