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an oxide of iron is found to be 7775 iron by mass determine the empirical formula for this compound and name
what would be the percentage error of water if the volume was 50 ml mass a of the graduated cylinder is 1950 mass b
if 600 grams of naoh is used to neutralize 10 l of 0500 m h2so4 what reactant is in excess is the resulting solution
you mix together the following three solutions the order of mixing doesnt matter1000 ml 0100nbspmnbspna2so4 500 ml
electron in a one-dimensional box uncertainty relation 25 setup one electron mass me charge e in a one-dimensional box
this is the last of my problems and i cant even figure out how to start this i believe this problem is combining
the metals in group iiia iva and va of the periodic table are not transition metals however all but 1 have variable
determine the concentrations of mgcl2 mg2 and cl- in a solution prepared by dissolving 130 times 10-4 g mgcl2 in 225 l
1 name a reagent that will precipitate sulfate phosphate and carbonate ions2 name a reagent that will dissolve
balanced equation for thenbspdouble-replacement precipitationnbspreaction described using the smallest possible integer
the reaction between hcl and nahco3 should take place quickly and release gaseous co2 you will then use the mass lost
a student placed 125 g of glucose in a volumetric flask added enough water to dissolve the glucose by swirling then
1 what type of process is involved in going from element to compounds and vice
calculate the of calcium carbonate in a mixture of calcium carbonate sodium carbonate and magnesium sulfate if we
what concentrations of acetic acid pka 476 and acetate would be required to prepare a 015 m buffer solution at ph 50
if 143 grams of water having an initial tempurature of 257 c are cooled by removing 427 kj of heat from it what is the
a balloon is filled with gas to 165 ml at 20c the balloon then expands to 345 ml by changing the temperature what
experiment steps1 boil 200ml water in a 400ml beaker2 add 50 ml 030m pbno32nbspto a regular test tube3 add 030 m hcl in
a molecule with a central atom and two bonded atoms is bent with a bond angle of 105 degrees assuming the central atom
describe thenbsp4 levels of protein structurenbspwhy is shape so
a solution of ammonia and water contains 150times1025nbspwater molecules and 550times1024nbspammonia molecules how many
give the percent yield when 2816 g of co2 are formed from the reaction of 5000 moles of c8h18 with 4000 moles of o2
what effect has a directional bond on the weight to volume ratio of in an atomic
the fundamental frequency is 2230 cm-1 for 1h 127i if the h atom is replaced with d isotope of h atom calculate the
a compound of carbon hydrogen and nitrogen was analyzed and found to contain 4662 c 1220 h 4118 n by mass what is