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calculate the activation energy for a reaction that has a rate constant of 146 x 10 6 m-1s-1 at 298k and 647x10-7
the standard enthalpy of formation of nh3g is -460 kjmol calculate the thermal energy evolved when 80g of h2g react
c18h21no3 solution of 779g codeine in water to make 147l of solution if the ph of this codeine solution is 959
how many grams of cobalt iii chloride and of hydrogen fluoride are needed to prepare 10000 grams of cobalt iii
a gas sampling device containing 200g of the sorbent tenax is used to collect organic impurities from air that may be
we have a situation where hydrogen gas at 300 degrees c is flowing out of a tube at the rate of 100mlminamp160 the tube
we have a situation where hydrogen gas at 300 degrees c is flowing out of a tube at the rate of 100mlmin the tube is
the bond length of 13 na 19f is 1926 pm calculate the value of b and the spacing between lines in the pure rotational
why would you observe a pure rotational spectrum in the microwave region and a rotational-vibrational spectrum rather
what quantity of energy in joules is required to raise the temperature of 454g of tin from room temperature 250 degree
a 200 l flask is filled with 600 mol of n2 g abd 1500 mol of h2 at eq at 400 c the flask contains 050 mol of nh3 what
for a first ordwr reaction theconcentration of the reactant was reduced from 0150 m to 0120 m after heating at 500 c
calculate the mass of each product formed when 174 g of silver sulfide reacts with excess of hydrochloric acid hciag2s
a certain amount of gas at 25degrees celcius and at a pressure of 0800atm is contained in a glass vessel suppose that
calculate the ph of a solution containing 035m lactic acid and 025m sodium lactate is this a buffered solution explain
calculate the ph of a solution containing 020m in hcn and 012m nacn is this a buffered
given a solution of ammonium chloride what additional reagent or reagents are needed to prepare a buffer from the
1-consider the element with the electron configuration kr5s2 4d10 5p3 this element isa an alkali metal b a
a mixture of the compounds sodium bromide and calcium oxide contains 234 g of calcium oxide and is 691 by mass calcium
describe how you would prepare 1000 l of 005m hepes buffer ph 745 in the lab you have pure hepes a ph meter 100 m hcl
calculate the equilibrium constant for the weak base ch3nh2 if a solution of the base with an initial concentration of
when 150 ml of 0400 m h are mixed with 200 ml of 0500 m oh- the final temperature of the solution is 265degc what was
household bleach is an aqueous solution of sodium hypochlorite what is the molarity of a bleach solution that contains
the measured dipole for a binary molecule is 053 d with a bond length of 219 pm what is the separated charge in
at a temperature of 250k the molecules of an unknown gas z have an average velocity equal to that of hi at 500k what is