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potassium-40 has a natural abundance of 00118 explain how many atoms of potassium-40 are present in a 135 g sample of
in a thin layer chromatography experiment a plate of length 897 cm was utilized and a horizontal line was made at 123
explain what is the freezing point of 50 percent by weight solution of ethylene glycol c12h6o2 in water anitfreeze mol
1 compute delta g or the oxidation of fre fadh2 by o2 explain what is the maximum number of atps that can be
the activity of a sample of ba-137m has reduced by 75 from its initial activity after 510 minutes explain what is the
if a reaction is second order in hydroxide ion by explain what factor the initial rate would change if the
explain what are the concentrations of benzoic acid as well as benzoate if a solution containing 02 mm benzoic acid is
explain what is the rate molls for 25ml nh22s2o8 ammonium persulfate with reaction time of 349s and 1l total
neutralization of a 3000ml sample of a sulfuric acid solution needed 4033ml of 03870 m sodium hydroxide explain what is
one way of obtaining pure sodium carbonate is from side to side the decomposition of the mineral trona na 3co3hco32h2o
explain what is the probability of finding an electron anywhere in one lobe of a p-orbital given that it occupies that
if 300ml of 0250 m calcium nitrate is added to 125g of potassium phosphate explain what is the mass in grams of the
two beakers are places in a closed container beaker a initially contains 015 mole of naphthalene c10h8 in 100g benzene
explain when it comes to an infrared spectrum what denotes the purity of a sample explain how one refers to specific
find out the empirical and molecular formulas for the following 1250g sample molar mass 8812gmol 4539g oxygen 1146g
if in a distillation apparatus does the water enter the condenser at the hose connection closer to the receiving flask
compute the freezing point of a 19 molal aqueous glucose solution the freezing point depression steady for water is 186
explain a water sample is found to contain the pollutant chlorofluorobenzene cfb with a concentration of 25 ppb by mass
compute the boiling point of an aqueous solution containing 1215 g of copper ii chloride as well as 450e2 g of water
a solution is prepared by dissolving 1004g sucrose c12h22o11 in 0554 kg of water the final volume of the solution is
a solution contains 0400 mol of calcium nitrate as well as 6500 mol of water compute the vapor pressure of the solution
explain what pressure of carbon dioxide is necessary to keep the carbon dioxide concentration in a bottle of club soda
compute the osmotic pressure in atm of a solution containing 550 g ethylene glycol c2h6o2 in 900ml of solution at 25
a compound with molecular formula c9h12o has strong infrared absorption at 3300 to 3400cm-1 the 13c nmr spectrum of
choose five different polymers obtained through step polymerization present its synthesis as well as the detail