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Section 2: Mole-Mass and Mole-Volume Relationships
Terms in this set (16)
How do you convert the mass of a substance to the number of moles of the substance?
Use the molar mass of an element or compound to convert between the mass of a substance and the moles of a substance
mass (grams) = number of moles x [mass (grams) / 1 mole]
moles (g/mol) = mass (grams) x [1 mol / mass (grams)]
States that equal volumes of gases at the same temperature and pressure contain equal numbers of particles
Volume of A Gas
Varies with temperature and pressure
Because of these variations, the volume of a gas is usually measured at a standard temperature and pressure
Standard Temperature and Pressure (STP)
A temperature of 0°C and a pressure of 101.3 kPa, or 1 atmosphere (atm)
What is the volume of a gas at STP?
At STP, 1 mol or 6.02 x 10 ^ 23 representative particles, of any gas occupies a volume of 22.4 L
Molar Volume of A Gas
Calculating Volume at STP
volume of gas = moles of gas x (22.4 L / 1 mol)
Calculating Molar Mass From Density
grams / mole = grams / L x 22.4 L / 1 mole
How is the density of a gas usually measured?
in grams per liter (g / L) and at a specific temperature
Molar Mass =
density at STP and molar volume at STP
Unit of the Molar Mass of A Gas At STP
Unit of the Density of A Gas At STP
Unit of Molar Volume At STP
22.4 L / 1 mol
Unit of Molar Mass of A Compound
THIS SET IS OFTEN IN FOLDERS WITH...
Section 1: The Mole - A Measurement of Matter
Chemistry Chapter 8 Covalent Bonding Section 1
8.1 Molecular Compounds
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