stochiometry (1.4-1.5)

the mole

exactly the number of elementary given by the avogrados constant (6.0 X 10ˆ23)

carbon 12 and are expressed as relative atomic mass Ar and relative formula mass Mr

simplest whole ratio of atoms of each element present in compound

ratio shows actual amount of atoms of each element present in that compound

-weigh weighing boat, note mass -add about 2g acid, note mass -add acid to washed beaker -reqeigh the boat and wirte the weight -add 50ml distileled water to beaker stir to dissolve crystals crush them-put a washed funne into washed volumetric flask and carefully pour the acid down stirring rod into funnel do not lose any acid -return rod to beaker and add 50 ml to rinse beaker and add to flask rinse rod and funnel, do not go over 250ml -put lid into flask secure base and shake

cm-dm = /1000

[ ] square brackets

-rinse buretter with small amount of acid, throw to waste -fill burette with acid until bottom of miniscus 0.00 line -rinse pipette with base/ alklai -use pump and volumetric pipetter to pipette 25 ml of base into conical flask -add a few drops of indicator eg.phenolpthalein indicator -add acid washing and swirling until you achieve a pale pink color -record volume on burette -wash out flask and repeat -achieve until you have 2 concordant results (within 0.2)

divide the uncertainty of aparatus by weight or value of measured eg mass times by 100% and all uncertaintys, and calculate the percentage difference from og value

equal volumes of all gases under same conditions (temp and pressure) contain euqal numbers of mlecules (22.7 dm cubed molˆ-1)

volume= mol * 22.7

the sum of all the relative atomic masses

atomic masses of the constituent elements in the molecule

273K, 100KPa

-moving particles with negible volume and intermoecular forces -all collisions between particles are considered elastic and frictionless( no energy loss in motion or collision) -moelcules constantly moving in random directions with distribution of speeds -molecules of gas are indistinguishible small hard spheres that are point-like

-some factors such as gravity will cause particles to have variable concentrations -particles have intermolecular forces attractive and electrons are repulsive -have volumes that cannot be ignores at high pressures - have intermolecular forces which become more significant at low temperatures

great seperation of the particles

doubles the collisions, doubles pressure

double the numb of collisions, doubles pressure

double temp you double the KE and therefore double the collisions and the pressure

they are inversely porportional when its p vs 1/v then its a positive correlation, directly porportional

directly porportional

directly porportional