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8 Cards in this Set
- Front
- Back
What is a mole? How do you work out the number of elementary particles? What is molar mass and its formula? |
A mole of a substance is the amount of that substance that contains the same number of elementary particles are there are carbon atoms in 12.000g of Carbon-12. Elementary particles = moles X 6.02x10^23 Molar mass is the mass of one mole of a substance in grams per mole. Moles = mass / RFM. |
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What is the equation for percentage yield and atom economy? |
Percentage yield = amount of product formed / maximum amount of product x 100. Atom economy = molar mass of desired product/ total molar mass of products x 100. |
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What is a solution? |
A solution is a homogeneous mixture of 2 or more substances in which the proportions of the substances are identical throughout. |
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What are solutions made up of? What is concentration and its formula? |
Solutions are made up of the solvent and the solute. The concentration is the amount of solute in the mixture. Molarity = moles / RFM. Concentration (g/dm3) = Molarity x RFM |
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What is the ideal gas equation and its units? |
PV = nRT where P is pressure in Pascals, V is volume in m3, n is the number of moles, R is the ideal gas constant (8.31) and T is the temperature in Kelvin. |
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What factors affect the volume occupied by a gas? |
Temperature- hotter the gas, faster the particles moving, more space occupied. Pressure- higher pressure, more compressed, less space occupied. Amount- more gas particles, more space they will occupy. |
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What is percentage purity? |
Percentage purity = mass of pure substance/ mass of impure substance x 100 |
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How do ionic equations work? |
Spectator ions are left out and only reacting ions are shown. Look for which ion has changed state Acid base reactions have the general ionic equation: H+ + OH- -> H20 |