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11 Cards in this Set
- Front
- Back
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What is Mole? |
The mole is the amount of substance in grams that has the same number of particles as there are atoms in 12 grams of Carbon-12. |
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What is R. A. M? |
Relative Atomic Mass is the average mass of one atom compared to one twelfth of the mass of one atom of carbon-12. |
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What is the R. M. M? |
Relative Molecular Mass is the average mass of a molecule compared to one twelfth of the mass of one atom of carbon-12. |
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One mole of any specified entity contains (Avogadro's number) of entity. |
The Avogadro's number is 6.022 times 10^23. |
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Formula for moles |
Moles= mass ÷ molar mass |
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Formula for molar concentration |
Concentration= moles ÷ volume |
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State the Avogadro's law |
This states that equal volumes of all gases at the same temperature and pressure have equal number of moles. |
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Formula for mass concentration |
Mass concentration= (moles ÷ volume) times molar mass Or Mass concentration= molar concentration times molar mass |
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N2 + 3H2 → 2NH3 An example, as to explain the equation, is 1 mole of dinitrogen reacts with 3 moles of (di) Hydrogen to produce 2 moles of Ammonia. What are the numbers in the equation called? |
The balancing/ stoichiometric numbers are 'mole ratios'. |
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What is an empirical formula? |
An empirical formula is the simplest ratio of atoms of each element in the compound. |
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What is a molecular formula? |
A molecular formula is the actual number of atoms of each element in the compound. |
