Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
suppose you have a solution of acid hf with concentration of 0003m what would the concentration of h and f- be at
you need to make 500 ml of 100 mm potassium phosphate buffer at ph 75 you have the stock solutions of kh2po4 and k2hpo4
born-haber cycles are called cycles because they form closed loops if any five of the six energy changes in the cycle
the solubility of a slaked lime caoh2 in water is 185g100ml what volume of 00400 m hcl is needed to neutralize 100ml of
how many moles of oxygen are formed when 586 g of kno3 decomposes according to the following reaction the molar mass of
compound ch32cchch3 contains 8563 g carbon per 1000 g compound calculate the mass g of a sample of ch32cchch3 if it
calculate the energy change in kilojoules per mole when lithium atoms lose an electron to bromine atoms to form
calculate the change in internal energy u2-u1 in kjkg of oxygen o2 when the temperature of the gas is increased from
helium gas is contained in a pressure vessel of volume v10m3 determine the mass in kg of helium in the tank if the
what will be the temperature difference needed in a hot-air balloon to lift 100 kg of mass assume that the volume of
water softeners often replace calcium ions in hard water with sodium ions since sodium compounds are soluble the
1000 ml of 0100 m acetic acid is placed in a flask and is titrated with 0100 m sodium hydroxide an appropriate
a certain reaction has an activation energy of 5742 kjmol at what kelvin temperature will the reaction proceed 350
one of the major problems in peptide synthesis concerns racemization of the amino acids if all the stereogenic centers
a pentapeptide was found to contain the amino acids phe gly met ala and ser n-terminal analysis yielded the pth
244 grams of metal was heated in boiling water and then dropped in a calorimeter containing 100 grams of water the
1 write the reaction of phosphoric acid with sodium hydroxide use only the first dissociation of the acid2 a student
we are unable to detect iron via atomic spectroscopy the problem is we have added fe-edta in a formulation for
how many aluminum cans would you have to collect to earn 300 if each can weighs 1875 g and al is worth 800 per
a 2007 g sample of a hydrocarbon is combusted to give 1389 g of h2o and 6785 g of co2 what is the empirical formula of
nitroglycerine decomposes violently according to the unbalanced chemical equation below what mass of nitrogen gas is
a 321 g iron rod initially at 230c is submerged into an unknown mass of water at 634c in an insulated container the
if 500 g br2 and 300 g nh3 react according to the equation below what is the maximum mass of ammonium bromide produced3
write the structural formula and other name of a 2-bromo-33-dimethylhexane b
what is the ph of a solution prepared by dissolving 53g of lithium hydroxide in water to give 280ml of