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The pH of a solution is prepared by dissolving 0.30 mol of the weak acid, HA, in enough water to make 1.0 liter of solution w/ a pH of 6.1. calculate Ka and % ionization of the HA solution.
What is the relationship between coordination number, packing, and density (as mass/volume). How do the two more efficient forms of packing compare regarding volume.
a robust first grader goes for swimming lessons three times a week and he enjoys it thoroughly. during the first week
Write a balanced equation for the spontaneous reaction that would occur if a cell were constructed using a manganese metal electrode in a 1.00M solution of Mn(NO3)2 and an inert electrode
Compound B gave a positive 2,4-dinitrophenylhydrazine test, but a negative result when treated with the Tollens reagent. However, B did give a positive iodoform test. The 1H NMR spectrum for Compound A showed the following
The dehydration of trans-2-methylcyclopentanol with H2SO4 will give what major product? a) cyclopentene b) 1-methylcyclopentene c) 2-methylcyclopentene d) 3-methylcyclopentene
If 4.00 g of the unknown compound contained 0.133 mol of C and 0.267 mol of H, how many moles of oxygen, O, were in the sample?
A 0.4168-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.7745 g of CO2 and 0.1586 g of H2O. What is the empirical formula of the compound?
How many moles of solute particles are present when 0.25 moles of CaSO4 is dissolved in water
An oxide of manganese consists of 77.4% manganese by mass. Determine its empirical formula and enter it in the box below.
How many grams of water can be cooled from 54.7 ? to 43.1? by the evaporation of 19.7 g of water? The heat of vaporization of water in this temperature range is 2.40 kJ/g
A certain indicator, HA, has a Ka value of 0.000040. The protonated form of the indicator is yellow and the ionized form is red. What is the pKa of the indicator
The compound K2SiO 3 • χH2O is a hydrated crystal. It is analyzed for percent water in a procedure similar to the laboratory assignment with barium chloride
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