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Consider the titration of 25.0 mL of a 0.723 M HCl solution with a 0.273 M KOH solution. Calculate the hydrogen ion concentration before any titrant, KOH solution, is added.
How many grams of water are formed when 5.00 g of butanol combust with excess oxygen according to the reaction shown below?
Normalize the wave function x(a - x) y(b - y) over the range 0
2.10 L of a buffer solution that is 0.360 M in NH3 and 0.430 M in NH4Cl are diluted to 4.30 L with distilled water. What is the pH of the buffer? Kb of NH3 = 1.8 10-5.
Three compounds are to be separated using HPLC. Compound A and Compound B have the same polarity but are more polar that Compound C. Compound A and Compound C have the same molecular weight (5000), and Compound B has a molecular weight of 26,000.
Four kg of steam in a piston/cylinder device at 400kpa and 175C (448.15) undergoes a mechanically reversible, isothermal compression to a final pressure
A buffer is made by combining 3.50 L of 0.200M butylamine, C4H9NH2 with 7.50L of 0.100M butylammonium chloride, C4H9NH3Cl. Assuming that volumes are additive
Calculate the pH for the soluton after addition of solid sodium formate to cause the formate ion (CHOO-) to increase to 0.2 M
Calculate how long it will take for 0.500 g of the isotope to be reduced to 0.150 g by decay.
a) what is the new volume if 0.500 mol of O2 gas is added? b) Oxygen is released until the volume is 10.0 L. How many moles of O2 are removed? c) What is the volume after 4.00 g of He is added to the 4.80 g of O2 gas in the container
write the balanced molecular equation of the reaction performed. include the physical state of each species aq l g or
Identify the statements that accurately describe how hydrogen ion concentration relates to energy production in oxidative phosphorylation.
at 25.0degc a sample of xe gas occupies 545 ml in a piston-cylider apparatus when the external pressure is 751 torr. at
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