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An unknown acid was found by combustion analysis to have an empirical formula of CH2O. 3 grams of this acid was titrated against an aqueous solution of 10 grams of sodium hydroxide in 100ml. 20ml of the sodium hydroxide solution were required to reach the equivalence point.What is the Molecular formula of the acid.Assmue the neutralization reaction has the formula HA+NaOH--->NaA+H2O
The density of lead is 11.3 g/ml. The water level in a graduated cylinder initially at 220mL rises to 297mL after a piece of lead is submerged. What is the mass in grams of the lead?
An experiment requires 44.0 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
For the reaction:-2 HCl + Na2CO3 - 2 NaCl + H2O + CO2 ,179.2 liters of CO2 is collected at STP.
Lead-210 has a half-life of 20.4 years. This isotope decays by beta particle emissio, Calculate the mass defect and binding energy
Which reaction sequence would be best to prepare m-chloroaniline from benzene? a. chlorination, nitration, reduction
A mixture of copper(II) sulfate pentahydrate (249.70 g/mol) and magnesium sulfate heptahydrate (246.49 g/mol) is heated until all the water is lost. The weight of the initial mixture is 5.020 g, and the weight of the resulting anydrous compounds i..
How much heat energy is required to raise the temp. of 0.363 kg of copper from 23.0 C to 60.0 C The specific heat of copper is 0.0920 cal /(g.C).
A system at equilibrium contains I2(g) at a pressure of 0.16 atm and I(g) at a pressure of 0.20 atm. The system is then compressed to half its volume
we then titrated both the aqueous and organic layer. for organic layer, we used 0.1M (S2O3)2- for aqueous layer, we used 0.01M (S203)2- find concentration [I]2 (subscript 2) for aqueous and organic layer
A solution of KOH in ethanol is made up by dissolving 0.335 g KOH in ethanol to form 250.0 mL of solution. Similarly, 1.455 g of C2H5I is dissolved in ethanol to form 250.0 mL of solution.
Determine the equilibrium concentrations - what are the new equilibrium concentrations of all species.
what is the final volume of a 400.0 ml gas sample that is subjected to a temperature change from 22.0 degrees C to 30.0 degrees C and a pressure change from 760 mm Hg to 360 mm Hg
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