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Determine the ion concentrations, the pH, and the POH of a 0.050M solution of NaOH. NaOH is a strong base.
The student titrated 25.0 mL of the buffer with 0.115 M NaOH. What is the concentration of the weak acid in the buffer? what is the buffer strength i.e, the total HA and A
Determine the activation energy Ea in kJ/mol for a reaction who's rate constant k1 = 4.600 x 10(-5) at 364.00 Kelvin changes to k2 = 7.500 x 10(-3) when the temperature is changed to 790.00 Kelvin. R = 8.314 J Enter your answer in kJ.K-1mol-1
the standard enthalpy of formation of brf3g is -79.0 kjmol. the standard enthalpies for the atomization of br2l and
At t= 0 , a particle leaves the origin with a velocity of 5.0 m/s in the positive y direction. Its constant acceleration is giving as a = (3.0i - 2.0j) m/s^2. At the instant the particle reaches its maximum y coordinate how far is the particle fro..
what are the concentrations of the significant ionic species of a 0.100M solution of lysine at pH=4
How many electrons are there in an s sub-level? a p sub-level? a d sub-level?An f sub-level?
Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
Zinc carbonate hydroxide contains 59.55% zinc by mass. Calculate the molecular weight (molar mass) of zinc carbonate hydroxide. (There are 5 atoms of zinc in every unit of zinc carbonate hydroxide.)
a beaker with 130ml of an acetic acidbuffer with a ph of 5.00 is sitting on a benchtop. the totalmolarity of acid and
How much hexanol was in the sample represented by this chromatogram? ( chromatogram shows retention time for butanol to be 10 min and retention time for pentanol to be 20min.
An example of an amine containing drug is Procaine which contains 2 amine groups.When HCl is added to procaine I think the tertiary amine is protonated as it has more electrons and the benzene amine is delocalised by resonance with the ring so is ..
an unknown element forms a yellow ion xo . it forms a precipitate with silver ions. if 48.0 ml of a 0.250 moll solution
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