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A 2.89 g sample of solid calcium carbide (CaC2) reacted with water to produce acetylene gas (C2H2) and aqueous calcium hydroxide. If the acetylene was collected over water at 16.3 C and 0.973 atm, how much acetylene was produced? Answer in units of mL
suppose you chose phenolphthalein , which changes color at the end point from colorness(acidic) to pink at pH8.5 .Would you need the same , more or less volume of NaOH in the back-titration?
Assuming that the gas becomes saturated with benzene vapor and that the total gas volume and temperature remain constant, what is the vapor pressure of the benzene in torr
Determine the amount of heat required to raise the temperature of a 153 g bar of gold by 50.0C. (specific heat of gold = 0.128 J/g.C)
350.0 mL of 2.50 M HCL are added to 400.0mL of 5.00 M HCL. Assuming that the volumes are additive, what is the final concentration
What is the structure (including functional groups)? Stereochemistry (racemic or single enantiomer)?
A chemist wants to make 6.5 L of a 0.270 M solution. What mass in grams should the chemist use?
Calculate the cost in free energy to move 1mol K+ through the cell wall by active transport. Assume no change in K+ concentrations during this process.
A buffer that contains 0.255 M of acid, HA and 0.153 M of its conjugate base A-, has a pH of 3.39. What is the pH after 0.0115 mol of NaOH are added to 0.666 L of the solution
Based on the ionization energies of the alkali metals, which alkali metal would you expect to undergo the least exothermic reaction with chlorine gas
The normal boiling point of acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr.a. What would be the boiling point of acetone (AHvap = 32.0 kJ/mol) at this elevation?
A gas stream that contains 1.50 mole% CO2 flows through a pipeline. 20.0 kg/min of CO2 is injected into the line. A sample of the gas is drawn from a point in the line 10 meters downstream of the injection point and found to contain 2.3 mole% CO2.
using a solution contains 10 ammonium by mass and hasnbsp density 0.99 gcm-3. determinenbsp hydroxyl and hydrogen ion
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