Term
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Definition
| The volume of gas maintained at a constant temperature and pressure is directly proportional to the number of moles of the gas. |
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Term
| A sample of oxygen gas occupies 1 L when its temperature is 190K and its pressure is 129kPa. How many mole of oxygen are present? |
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Definition
| 129kPa *1.00 L *273 K/190K 101 k pa = V2 V2 = 1.83 L at STP once the gas's volume at STP has been calculated number of moles can be found. 1.83 L/1 mol O2/22.4 L -= 0.0817 mol O2 |
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Term
| Formula for density at STP |
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Definition
| g/L g/L divided by L/mol = molar mass/molar volume |
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Term
| Formula for rate of effusion? |
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Definition
| 1 divided by square root of molar mass. |
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Term
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Definition
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Term
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Definition
| the volume of a dry gas is inversely related to the pressure if the temperature is held constant P1V1=K = P2V2 |
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Term
| How many atoms are in a 4.5 mol sample of helium? |
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Definition
| Since one mole of any substance contains 6.022 x 10^23 objects, this relationship can be used as a conversion factor to change 4.5 mols into the number of atoms = 4.5/6.022x10^23 atoms = 2.7 x 24 atoms |
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