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why are boiling chips added to the round bottom flasks of both simple and fractional distillations explain in detail
describe the role of the fractioning column in fractional distillation in detail what is it made of and what does it do
you have a helium balloon that contains 120 grams of helium at 230degc it takes 1488 calories of heat to raise the
you have a piece of metal that has a mass of 162 grams and a volume of 111 cm3 what is the density of your metal in
you have a glass that contains 23 grams of water at 25degc you add 253 calories of heatenergy to the waternbspwhat is
what is the main process that dominates what shape your crystals formwhat is the most important criteria for completing
a mixture was recrystallized to purify compound a melting point of 105 degc from compound b melting point 85 degc which
can you please assist me on a question that requires the calculation of valence electrons and the lewis structure of
magnetite is a mineral having the formula fe3o4 or feofe2o3 a 11324-g sample of a magnetite ore was dissolved in
soil sampling results indicated the area impacted with lead above action levels is 30 feet by 55 feet the depth of the
what is the net ionic reaction for the reaction between aqueous solutions of hydrochloric acid with sodium
on the basis of general solubility rules predict the identity of the precipitate that forms when aqueous solutions of
a long glass tube sealed at one end has an inner diameter of 163 mm the tube is filled with water and inverted into a
if the solution contains 524 g silver nitrate and is mixed with 531 g of barium chloridenbspwhat is the mass of the
what is the relationship between the atomic mass of an element and a mole of that elements
a large flask with a volume of 936 ml is evacuated and found to have a mass of 13466 g it is then filled to a pressure
through a series of tricky chemical reactions your instructor has you decompose both samples into the constituent
what would the partial pressure be for each gas present also the total pressure of the tank for scuba dives below 150
consider the combustion of octane c8h18 what volume of oxygen gas at stp would be needed for the complete combustion of
what would the pressure of the gas in the flask for an open-tube manometer if the level of the mercury that is open to
with ammonium carbonate and calcium chloride on the basis of general solubility rules predict the identity of the
beers law states aebc which directly relates the concentrationc of a sample its molar absorptivity e and the
use the ideal gas laws to calculate the mass of 25 m3 of a mixture of 21 vv oxygen o2 and 79 nitrogen n2 which is at a
suppose that you add 25 g of naoh to 50g of hno3 in a calorimeter and you measure a resulting temp increase of 1517 c