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Solid carbon dioxide goes directly from a solid to a gaseous state at -78 degrees Celsius (change of Hsub 25.2 kj/mol) calculate the amount of heat required for sublimation of 28.5 g of dry ice.
You require 36.78 mL of 0.0105 M HCl to reach the equivalence point in the titration of 25.0 mL of aqueous ammonia. What was the concentration of NH3 in the original ammonia solution
A 269 mg sample of rock was found to have 2.45 × 10-6 mol of potassium-40 (t1/2 = 1.3 × 109 yr) and 2.45 × 10-6 mol of argon-40. How old was the rock? What assumption is made about the origin of the argon-40?. Enter your answer in scientific notat..
The data are based on 106m3 measured at SC of methane burned. What is the approximate mole fraction of SO2, NO2, and CO (on a dry basis) for each class of combustion equipment
What mass of Titanium IV Chloride forms from 3.00g titanium and 8.00g chlorine gas
Draw the structure of any D-ketoheptose in the open chain form, and answer the following questions (you must use either Haworth projection or chair conformation in each of the points below)
A 25 ml sample of .10M sodium acetate is titrated with .10M HCl. What is the pH after the addition of 35ml of HCl. (Kb of CH3CO2=5.6e-10)
when 50.0 g of Copper are reacted with silver nitrate solution Cu + 2AgNo3 - Cu(No3)2 +2 Ag 148 g of silver are obtained. what is the percent yeild of silver obtained?
consider a reaction of 50.0 ml of 1.12 mhc2h3o2 with 50.0 ml of 1.27 mnh3. calculate the number of mole of hc2h302 and
a if 65.65 g of mercuryii nitrate and 4.26 g of hydrogen sulfide are mixed in 490.0 g of water to form 54.16g of
Compute the mass of H 2 O formed when 22 grams of propane are burnt if 4.4grams of propane are burnt in excess O2 7.2g of H 2 O are formed.
calcium oxide reacts with water in a combination reaction to produce calcium hydroxide caos h2ol --gt caoh2s. in a
what is the molarity of a solution containing 16.0 rm g of rm kcl in 324 rm ml of
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