# CHEM1 - Chemical Equations

What is the equation for calculating the moles of a substance?
Number of moles = mass / molar mass (Mr)
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What is the equation for calculating the moles in a solution?
Number of moles = (concentration x volume in cm^3) / 1000
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What is the equation for calculating the number of moles in a gas at r.t.p?
Number of moles = volume in dm^3 / 24
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What is the ideal gas equation?
PV = nRT
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State what 'P' stands for in the ideal gas equation, include the unit and conversion.
Pressure. Measured in Pascals (Pa). To get from KPa to Pa, you multiply by 10^3.
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State what 'V' stands for in the ideal gas equation, include the unit and conversion.
Volume. Measured in m^3. To get from cm^3 to m^3, you multiply by 10^-3.
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State what 'N' stands for in the ideal gas equation, include the units.
The number of moles. Measured in Moles.
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State what 'R' stands for in the ideal gas equation, include its value.
The gas constant. It is always 8.31.
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State what 'T' stands for in the ideal gas equation, include the unit and conversion.
Temperature. Measured in Kelvins (K). To get from temperature to Kelvins you add 273.
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What is the equation for calculating a volume?
Volume = (Number of moles x 1000) / concentration
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What is the equation for calculating percentage yeild?
Percentage yeild = (Actual yeild / theoretical yeild) x 100
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What is the equation for calculating the atom economy?
% Atom economy = (Mass of desired products / Mass of reactants) x 100
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The number of particles in a mole. It is roughly 6 x 10^23.
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## Other cards in this set

### Card 2

#### Front

What is the equation for calculating the moles in a solution?

#### Back

Number of moles = (concentration x volume in cm^3) / 1000

### Card 3

#### Front

What is the equation for calculating the number of moles in a gas at r.t.p?

### Card 4

#### Front

What is the ideal gas equation?

### Card 5

#### Front

State what 'P' stands for in the ideal gas equation, include the unit and conversion.