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A 1.74 g sample of a compound that contains only Carbon and Hydrogen was burned in Oxygen and 5.28 g of CO2 and 2.70 g of H2O were obtained. What is the empirical formula of the compound?
Gas x effuses 0.629 times as far as oxygen under the same conditions. what is the molar mass of gas x.
Dissolving NH4Cl(s) in water is endothermic with a heat of the solution of 15.2 kJ/mol. If a 6.134 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 24.5°C, what is the minimum temperature reached by the solution
if you were monitring the titation by visivle spectroscopy what wavelength would you select for the data analysis? why?
A bottle contains 225 mL of insulin at a concentration of 50.0 mg/mL. What is the total mass of insulin in the bottle?
Make a rough sketch showing how the following properties of a baseball depend on time, from the moment it is hit high into left field to the time it is caught by the outfielder. You may neglect the effects of friction!
In an acid base titration a 25mL portion of a solution containing sulfuric acid (H2SO4) was titrated with a 0.200M NaOH(aq). write the chemical equation for this particular titration
Calculate the osmotic pressure of a solution containing 18.55 of hemoglobin in 13.7 of solution at 24. The molar mass of hemoglobin is .
Aqueous solutions of ammonium sulfide, (NH4)2S, and Hg(NO3)2 react to produce HgS and NH4NO3. a. Write the overall balanced equation for the reaction. Indicate the state (s, aq) for each compound. b. Name each compound. c. What type of reaction is..
Determine the empirical and molecular formulas of Ibuprofen has 75.69% C, 8.80%H and 15.51%O by mass and has a molar mass about 206g/mol.
assuming stp how many liters of carbon dioxide are produce when 5.74 g of caco3 reacts with an excess of
What is the kinetic energy in joules of a 1183 motorcycle moving at 63.
A buffer solution is prepared by adding 32.8 grams of sodium acetate, NaC2H3O2 to 1.00 L of 0.500 M acetic acid, CH3CO2H. Ka = 1.8 x 10-5 for acetic acid.
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