12609835
Description
Flashcards by lucy latuske, updated more than 1 year ago
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Created by lucy latuske
about 6 years ago
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| Question | Answer |
| What is a mole? | One mole is the amount of substance that contains as many entities specified by a formula, as there are in 12g of Carbon-12 |
| How do you calculate moles? | Moles = mass / Mr |
| How do you calculate mass? | Mass = Mr X Moles |
| How do you calculate Mr? | Mr = mass / moles |
| What is Avogadro's Constant? | 6.02 x 10^23 |
| How do you calculate the number of entities? | 6.02 x 10^23 x Number Of Moles |
| What is 1 dm^3 equal to? | 1 litre |
| How do you convert dm^3 to cm^3 ? | x1000 |
| How do you convert cm^3 to dm^3? | / 1000 |
| How do you calculate volume? | Volume (cm^3) = moles x 24000 Volume (dm^3) = moles x 24 |
| How do you calculate percentage yield? | Percentage Yield = Actual yield/ theoretical yield x 100 |
| How do you calculate atom economy? | Atom Economy = Mr of desired products / Mr of all products x 100 |
| What is the ideal gas equation? | PV=nRT P = pressure (Pa) V = volume (m^3) n = number of moles R = gas constant (8.314) T = temperature (k) |
| How do you convert degrees C to K (kelvins) ? | add 273 |
| How do you calculate moles given concentration and volume? | Moles = concentration (mol dm^-3) x volume (dm^3) |
| Define Relative Atomic Mass (Ar) | the ratio of the average mass of one atom of an element to one twelfth of the mass of an atom of carbon-12 |
| Describe relative molecular mass (Mr) | the ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12 |
| Define empirical formula | the simplest whole number ratio of atoms of each element in a compound |
| Define molecular formula | the actual number of atoms of each element in a compoun |
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