Mol/mass calculations
what is avogadro's constant
there are 6.02x1023 atoms in a mol
how to separate different subtances dissolved in a liquid
chromatography
what does a catalyst do to the rate of reaction
increase it
mass of 5 mols of CHOOH
C=12 H=1 O=16
230g
what is the measurement calculated from chromatography
Rf / retention factor
what are the units for rate of reaction
g/s or cm3/s
what is the mass of one molecule of methane
C=12 H=1
2.66x10-23
what is the stationary and mobile phase in chromatorgraphy?
mobile = usually a solvent or mixture of solvents
stationary = does not move eg the paper
what are the three ways rate of reaction can be measured/seen
dissapearing cross
loss of mass
gas produced
112g of methane reacted with 448g of oxygen , 252g of water was produced, what mass of carbon dioxide was produced?
308g of carbon dioxide
what is the word for 'a mixture that is always made with the same proportions of the same substances'
formulation
what does a reaction have to be for the energy of a reaction calculated to be accurate
a closed system
in a reaction iron oxide reacts with carbon to produce carbon dioxide and iron. calculate the mass of iron produced from 500g of iron oxide (unbalanced)
Fe2O3+ C --> CO2 +Fe
Fe=56 O=16 C=12
2Fe2O3+ 3C --> 3CO2 +4Fe
350g
what can be identified using silver nitrate
barium , chloride , iodine (ions for the points)
what can affect rate of reaction
temperature
catalyst
pressure
surface area
concentration of reactant