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8 Cards in this Set

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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.

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.





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.

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

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.

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.

What is percentage purity?

Percentage purity = mass of pure substance/ mass of impure substance x 100

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