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The running engine of an automobile produces carbon monoxide at the rate og 188 g CO per hour.A car is left idling at 293.15 K in a garage that is 6 m long, 4m wide and 2.2m high How long would it take to build up a lethal concentration of CO of 1000 ppmv ?
A 750-mL sample of nitrogen was collected by displacement of water from a container at 30°C and an atmospheric pressure of 742 Torr. If the vapor pressure of water at 30°C is 31.8 Torr, calculate the number of moles of nitrogen gas produced.
if you add .454g of nitroglycerine to 100g of benzene at 25C, the vapor pressure of the solution is 94.85mmHg. Calculate the molar mass of nitroglycerine.
If the extinction coefficient of cobalt (II) ion is 5.0, what would the absorption of the solutioni in 2-a be in a 1.00cm cell
the system acd is hinged at a and d and supported by a cable which passes through a ring at b and is attached to hooks
A 0.0623g sample of cobalt sulfate was dissolved in dilute HCl and treated with 10% BaCl2 solution. The BaSO4 precipitate weighed 0.1075g. Determine the formula of this sulfate of cobalt.
A reaction mixture in a 10.00-L flask contains 0.42 moles each of hydrogen and fluorine gases plus 0.15 moles of HF. What will be the concentration of H2 when this mixture reaches equilibrium
flask a 25 ml 8 oh- ions and 4 ca 2 ionsflask b 25 ml 6 h ions and 6 cl- ionsa if each sphere represents 1.0 x 10-3 mol
Calculate Equilibrium constant, if delta Gf for NH3(aq) is -26.50 kj/mole; for H2O(l) is 237.13 kj/mole;for NH4+(aq) is -79.31 kj/mol; for OH-(aq) is 157.3 kj/mole. How many moles of NH4Cl must be added to 1.0L of 0.10M NH3 to make a buffer whose ..
Caffeine is a stimulant found in coffee and tea . A solution of caffeine in chloroform as a solvent has a concentration of 7.9 x 10^-2m. What's the percent of caffeine by mass? Calculate the mole fraction of caffeine.
Titration of 80 ml of unknown concentration of H3PO4 requires 126ml of 0.128M KOH. What is the concentration of H3PO4?
Draw the complete mechanism for the reaction that occurrs in this solvolysis experiment showing all intermediates and using curvy arrows to show electron movement.
Helium= ? g/mL Neon= ? g/mL Carbon monoxide= ? g/mL Nitrogen monoxide= ? g/mL If the density of air at 25 degrees C and 1.00 atm is 0.00117 g/mL, will any of the balloons float in this air? Which ones?
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