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Calculate the amount of heat (in kj) required to heat 2.75 kg of water from 13.20 degrees celsius to 46.32 degrees celsius
Find the volume of O2 produced if 10 g KCIO3 are completely decomposed by heating. 2KCIO3-heat----> 2KCI + 3O2
how many moles of zinc were oxidized. by how many grams did the mass of of the zinc electrode change during this process
How many moles of H^+ came out of the column? c.) How many moles of Ag^+ were trapped by the column? d.) How many moles of Ag^+ came out of (i.e. were eluted from) the column
What is the theoretical yeild of sodium carbonate for the equation: 2NaHCO3(s)--> Na2CO3(aq) + H2O(g) + CO2(g)
A box contains 126000 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
given that the specific heat capacities of ice and steam are 2.06 jgdegc and 2.03 jgdegc the molar heats of fusion and
Write the structures of all dimethylcyclobutanes. Specify those that are chiral. Show the planes of symmetry in those that are not. Explain.
What was the concentration, in mol/L and mg/L, of Cu^2+ and Zn^2+ in the original solution? If the solution was prepared by dissolution of 0.654 g of brass in 250.00 mL solution, what the percentage of copper and zinc in the original sample of bra..
How many grams of CaCl2 are needed to make 968.1 g of a solution that is 35.5% (m/m) calcium chloride in water? (Note that m/m has the same meaning as w/w.)
calculated on the basis of 1g mol pV = zRT so U = H- pV = H-zRT U ?=16,660-0.96/ x 8.314/ x 283/ x /1000=16,658 Is this calculation correct
Calculate the CO3- concentration of a 5.45 x 10-4 M H2CO3 (carbonic acid) solution. Ka1 and Ka2 of carbonic acid are 4.3 x 10-7 and 4.8 x 10-11 respectively.
A sample of propane,C3H8, contains 11.7 moles of carbon atoms. How many total moles of atoms does the sample contain?
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